Commit Graph

537 Commits

Author SHA1 Message Date
Russell King
33fa9b1328 [ARM] Convert asm/uaccess.h to linux/uaccess.h
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-09-06 11:35:55 +01:00
Russell King
5ed5fdf50c [ARM] clean up a load of old declarations
... some of which are now in linux/*.h headers.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-09-06 11:23:30 +01:00
Russell King
012d1f4af1 [ARM] move initrd code from kernel/setup.c to mm/init.c
This quietens some sparse warnings about phys_initrd_start and
phys_initrd_size.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-09-06 10:57:03 +01:00
Russell King
1de765c1e9 [ARM] remove pc_pointer()
pc_pointer() was a function to mask the PC for 26-bit ARMs, which
we no longer support.  Remove it.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-09-06 10:35:51 +01:00
Russell King
09d9bae064 [ARM] sparse: fix several warnings
arch/arm/kernel/process.c:270:6: warning: symbol 'show_fpregs' was not declared. Should it be static?

This function isn't used, so can be removed.

arch/arm/kernel/setup.c:532:9: warning: symbol 'len' shadows an earlier one
arch/arm/kernel/setup.c:524:6: originally declared here

A function containing two 'len's.

arch/arm/mm/fault-armv.c:188:13: warning: symbol 'check_writebuffer_bugs' was not declared. Should it be static?
arch/arm/mm/mmap.c:122:5: warning: symbol 'valid_phys_addr_range' was not declared. Should it be static?
arch/arm/mm/mmap.c:137:5: warning: symbol 'valid_mmap_phys_addr_range' was not declared. Should it be static?

Missing includes.

arch/arm/kernel/traps.c:71:77: warning: Using plain integer as NULL pointer
arch/arm/mm/ioremap.c:355:46: error: incompatible types in comparison expression (different address spaces)

Sillies.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-09-05 14:11:24 +01:00
Catalin Marinas
93ed397011 [ARM] 5227/1: Add the ENDPROC declarations to the .S files
This declaration specifies the "function" type and size for various
assembly functions, mainly needed for generating the correct branch
instructions in Thumb-2.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-09-01 12:06:34 +01:00
Nicolas Pitre
2d4b6c9aeb [ARM] 5221/1: fix ldm/stm emulation for kprobes
Logic for the p bit was reversed.

Signed-off-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-09-01 12:06:33 +01:00
Nicolas Pitre
3305a60795 [ARM] 5206/1: remove kprobe_trap_handler() hack
As mentioned in commit 796969104c,
and because of commit b03a5b7559,
the direct calling of kprobe_trap_handler() can be removed.

Signed-off-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-09-01 12:06:26 +01:00
Russell King
46097c7dd8 [ARM] cachetype: move definitions to separate header
Rather than pollute asm/cacheflush.h with the cache type definitions,
move them to asm/cachetype.h, and include this new header where
necessary.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-09-01 12:06:24 +01:00
Russell King
0ba8b9b273 [ARM] cputype: separate definitions, use them
Add asm/cputype.h, moving functions and definitions from asm/system.h
there.  Convert all users of 'processor_id' to the more efficient
read_cpuid_id() function.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-09-01 12:06:23 +01:00
Linus Torvalds
9c0d2a20fe Merge master.kernel.org:/home/rmk/linux-2.6-arm
* master.kernel.org:/home/rmk/linux-2.6-arm: (38 commits)
  [ARM] 5191/1: ARM: remove CVS keywords
  [ARM] pxafb: fix the warning of incorrect lccr when lcd_conn is specified
  [ARM] pxafb: add flag to specify output format on LDD pins when base is RGBT16
  [ARM] pxafb: fix the incorrect configuration of GPIO77 as ACBIAS for TFT LCD
  [ARM] 5198/1: PalmTX: PCMCIA fixes
  [ARM] Fix a pile of broken watchdog drivers
  [ARM] update mach-types
  [ARM] 5196/1: fix inline asm constraints for preload
  [ARM] 5194/1: update .gitignore
  [ARM] add proc-macros.S include to proc-arm940 and proc-arm946
  [ARM] 5192/1: ARM TLB: add v7wbi_{possible,always}_flags to {possible,always}_tlb_flags
  [ARM] 5193/1: Wire up missing syscalls
  [ARM] traps: don't call undef hook functions with spinlock held
  [ARM] 5183/2: Provide Poodle LoCoMo GPIO names
  [ARM] dma-mapping: provide sync_range APIs
  [ARM] dma-mapping: improve type-safeness of DMA translations
  [ARM] Kirkwood: instantiate the orion_spi driver in the platform code
  [ARM] prevent crashing when too much RAM installed
  [ARM] Kirkwood: Instantiate mv_xor driver
  [ARM] Orion: Instantiate mv_xor driver for 5182
  ...
2008-08-16 16:48:45 -07:00
Huang Ying
163f6876f5 kexec jump: rename KEXEC_CONTROL_CODE_SIZE to KEXEC_CONTROL_PAGE_SIZE
Rename KEXEC_CONTROL_CODE_SIZE to KEXEC_CONTROL_PAGE_SIZE, because control
page is used for not only code on some platform.  For example in kexec
jump, it is used for data and stack too.

[akpm@linux-foundation.org: unbreak powerpc and arm, finish conversion]
Signed-off-by: Huang Ying <ying.huang@intel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-08-15 08:35:42 -07:00
Nicolas Pitre
da1562af62 [ARM] 5194/1: update .gitignore
Signed-off-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-08-12 19:54:09 +01:00
Stefan Schmidt
751a8ae95d [ARM] 5193/1: Wire up missing syscalls
Setup some missing syscall pointed out by the checksyscalls.sh script. Fix two
small whitespace issues while being there.

Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-08-12 19:54:07 +01:00
Russell King
b03a5b7559 [ARM] traps: don't call undef hook functions with spinlock held
Calling the undefined instruction handler functions with a
spinlock held is a recipe for must_sleep() warnings.  Avoid it.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-08-12 19:54:07 +01:00
Russell King
492c71dd54 Merge branch 'for-rmk' of git://git.marvell.com/orion 2008-08-09 18:03:13 +01:00
Lennert Buytenhek
60296c71f6 [ARM] prevent crashing when too much RAM installed
This patch will truncate and/or ignore memory banks if their kernel
direct mappings would (partially) overlap with the vmalloc area or
the mappings between the vmalloc area and the address space top, to
prevent crashing during early boot if there happens to be more RAM
installed than we are expecting.

Since the start of the vmalloc area is not at a fixed address (but
the vmalloc end address is, via the per-platform VMALLOC_END define),
a default area of 128M is reserved for vmalloc mappings, which can
be shrunk or enlarged by passing an appropriate vmalloc= command line
option as it is done on x86.

On a board with a 3:1 user:kernel split, VMALLOC_END at 0xfe000000,
two 512M RAM banks and vmalloc=128M (the default), this patch gives:

	Truncating RAM at 20000000-3fffffff to -35ffffff (vmalloc region overlap).
	Memory: 512MB 352MB = 864MB total

On a board with a 3:1 user:kernel split, VMALLOC_END at 0xfe800000,
two 256M RAM banks and vmalloc=768M, this patch gives:

	Truncating RAM at 00000000-0fffffff to -0e7fffff (vmalloc region overlap).
	Ignoring RAM at 10000000-1fffffff (vmalloc region overlap).

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Tested-by: Riku Voipio <riku.voipio@iki.fi>
2008-08-09 15:38:15 +02:00
Russell King
058ddee562 [ARM] Fix SMP booting with non-zero PHYS_OFFSET
The existing code tries to get the pmd for the temporary page table
by doing:

        pgd = pgd_alloc(&init_mm);
        pmd = pmd_offset(pgd, PHYS_OFFSET);

Since we have a two level page table, pmd_offset() is a no-op, so
this just has a casting effect from a pgd to a pmd - the address
argument is unused.  So this can't work.

Normally, we'd do:

	pgd = pgd_offset(&init_mm, PHYS_OFFSET);
	...
	pmd = pmd_offset(pgd, PHYS_OFFSET);

to get the pmd you want.  However, pgd_offset() takes the mm_struct,
not the (unattached) pgd we just allocated.  So, instead use:

        pgd = pgd_alloc(&init_mm);
        pmd = pmd_offset(pgd + pgd_index(PHYS_OFFSET), PHYS_OFFSET);

Reported-by: Antti P Miettinen <ananaza@iki.fi>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-08-07 22:36:59 +01:00
Russell King
a09e64fbc0 [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach
This just leaves include/asm-arm/plat-* to deal with.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-08-07 09:55:48 +01:00
Russell King
be50972935 [ARM] Remove asm/hardware.h, use asm/arch/hardware.h instead
Remove includes of asm/hardware.h in addition to asm/arch/hardware.h.
Then, since asm/hardware.h only exists to include asm/arch/hardware.h,
update everything to directly include asm/arch/hardware.h and remove
asm/hardware.h.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-08-07 09:40:08 +01:00
Russell King
0f8469a54f [ARM] Eliminate useless includes of asm/mach-types.h
There are 43 includes of asm/mach-types.h by files that don't
reference anything from that file.  Remove these unnecessary
includes.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-08-07 09:40:04 +01:00
Russell King
897d85275d [ARM] Fix circular include dependency with IRQ headers
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-08-07 09:39:37 +01:00
Russell King
4baa992243 [ARM] move include/asm-arm to arch/arm/include/asm
Move platform independent header files to arch/arm/include/asm, leaving
those in asm/arch* and asm/plat* alone.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-08-02 21:32:35 +01:00
Srinivasa D S
ef53d9c5e4 kprobes: improve kretprobe scalability with hashed locking
Currently list of kretprobe instances are stored in kretprobe object (as
used_instances,free_instances) and in kretprobe hash table.  We have one
global kretprobe lock to serialise the access to these lists.  This causes
only one kretprobe handler to execute at a time.  Hence affects system
performance, particularly on SMP systems and when return probe is set on
lot of functions (like on all systemcalls).

Solution proposed here gives fine-grain locks that performs better on SMP
system compared to present kretprobe implementation.

Solution:

 1) Instead of having one global lock to protect kretprobe instances
    present in kretprobe object and kretprobe hash table.  We will have
    two locks, one lock for protecting kretprobe hash table and another
    lock for kretporbe object.

 2) We hold lock present in kretprobe object while we modify kretprobe
    instance in kretprobe object and we hold per-hash-list lock while
    modifying kretprobe instances present in that hash list.  To prevent
    deadlock, we never grab a per-hash-list lock while holding a kretprobe
    lock.

 3) We can remove used_instances from struct kretprobe, as we can
    track used instances of kretprobe instances using kretprobe hash
    table.

Time duration for kernel compilation ("make -j 8") on a 8-way ppc64 system
with return probes set on all systemcalls looks like this.

cacheline              non-cacheline             Un-patched kernel
aligned patch 	       aligned patch
===============================================================================
real    9m46.784s       9m54.412s                  10m2.450s
user    40m5.715s       40m7.142s                  40m4.273s
sys     2m57.754s       2m58.583s                  3m17.430s
===========================================================

Time duration for kernel compilation ("make -j 8) on the same system, when
kernel is not probed.
=========================
real    9m26.389s
user    40m8.775s
sys     2m7.283s
=========================

Signed-off-by: Srinivasa DS <srinivasa@in.ibm.com>
Signed-off-by: Jim Keniston <jkenisto@us.ibm.com>
Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-25 10:53:30 -07:00
Linus Torvalds
ecc8b655b3 Merge branch 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  nohz: adjust tick_nohz_stop_sched_tick() call of s390 as well
  nohz: prevent tick stop outside of the idle loop
2008-07-24 12:55:01 -07:00
Andrea Righi
27ac792ca0 PAGE_ALIGN(): correctly handle 64-bit values on 32-bit architectures
On 32-bit architectures PAGE_ALIGN() truncates 64-bit values to the 32-bit
boundary. For example:

	u64 val = PAGE_ALIGN(size);

always returns a value < 4GB even if size is greater than 4GB.

The problem resides in PAGE_MASK definition (from include/asm-x86/page.h for
example):

#define PAGE_SHIFT      12
#define PAGE_SIZE       (_AC(1,UL) << PAGE_SHIFT)
#define PAGE_MASK       (~(PAGE_SIZE-1))
...
#define PAGE_ALIGN(addr)       (((addr)+PAGE_SIZE-1)&PAGE_MASK)

The "~" is performed on a 32-bit value, so everything in "and" with
PAGE_MASK greater than 4GB will be truncated to the 32-bit boundary.
Using the ALIGN() macro seems to be the right way, because it uses
typeof(addr) for the mask.

Also move the PAGE_ALIGN() definitions out of include/asm-*/page.h in
include/linux/mm.h.

See also lkml discussion: http://lkml.org/lkml/2008/6/11/237

[akpm@linux-foundation.org: fix drivers/media/video/uvc/uvc_queue.c]
[akpm@linux-foundation.org: fix v850]
[akpm@linux-foundation.org: fix powerpc]
[akpm@linux-foundation.org: fix arm]
[akpm@linux-foundation.org: fix mips]
[akpm@linux-foundation.org: fix drivers/media/video/pvrusb2/pvrusb2-dvb.c]
[akpm@linux-foundation.org: fix drivers/mtd/maps/uclinux.c]
[akpm@linux-foundation.org: fix powerpc]
Signed-off-by: Andrea Righi <righi.andrea@gmail.com>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-24 10:47:21 -07:00
Jason Wessel
5cbad0ebf4 kgdb: support for ARCH=arm
This patch adds the ARCH=arm specific a kgdb backend, originally
written by Deepak Saxena <dsaxena@plexity.net> and George Davis
<gdavis@mvista.com>.  Geoff Levand <geoffrey.levand@am.sony.com>,
Nicolas Pitre, Manish Lachwani, and Jason Wessel have contributed
various fixups here as well.

The KGDB patch makes one change to the core ARM architecture such that
the traps are initialized early for use with the debugger or other
subsystems.

[ mingo@elte.hu: small cleanups. ]
[ ben-linux@fluff.org: fixed early_trap_init ]

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Acked-by: Deepak Saxena <dsaxena@plexity.net>
2008-07-23 11:30:15 -05:00
Kay Sievers
3f9787046e arm: bus_id -> dev_name() and dev_set_name() conversions
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-07-21 21:55:03 -07:00
Andi Kleen
4a0b2b4dbe sysdev: Pass the attribute to the low level sysdev show/store function
This allow to dynamically generate attributes and share show/store
functions between attributes. Right now most attributes are generated
by special macros and lots of duplicated code. With the attribute
passed it's instead possible to attach some data to the attribute
and then use that in shared low level functions to do different things.

I need this for the dynamically generated bank attributes in the x86
machine check code, but it'll allow some further cleanups.

I converted all users in tree to the new show/store prototype. It's a single
huge patch to avoid unbisectable sections.

Runtime tested: x86-32, x86-64
Compiled only: ia64, powerpc
Not compile tested/only grep converted: sh, arm, avr32

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-07-21 21:55:02 -07:00
Greg Kroah-Hartman
fc3a8828b1 driver core: fix a lot of printk usages of bus_id
We have the dev_printk() variants for this kind of thing, use them
instead of directly trying to access the bus_id field of struct device.

This is done in order to remove bus_id entirely.

Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-07-21 21:54:53 -07:00
Ingo Molnar
9b610fda0d Merge branch 'linus' into timers/nohz 2008-07-18 19:53:16 +02:00
Thomas Gleixner
b8f8c3cf0a nohz: prevent tick stop outside of the idle loop
Jack Ren and Eric Miao tracked down the following long standing
problem in the NOHZ code:

	scheduler switch to idle task
	enable interrupts

Window starts here

	----> interrupt happens (does not set NEED_RESCHED)
	      	irq_exit() stops the tick

	----> interrupt happens (does set NEED_RESCHED)

	return from schedule()
	
	cpu_idle(): preempt_disable();

Window ends here

The interrupts can happen at any point inside the race window. The
first interrupt stops the tick, the second one causes the scheduler to
rerun and switch away from idle again and we end up with the tick
disabled.

The fact that it needs two interrupts where the first one does not set
NEED_RESCHED and the second one does made the bug obscure and extremly
hard to reproduce and analyse. Kudos to Jack and Eric.

Solution: Limit the NOHZ functionality to the idle loop to make sure
that we can not run into such a situation ever again.

cpu_idle()
{
	preempt_disable();

	while(1) {
		 tick_nohz_stop_sched_tick(1); <- tell NOHZ code that we
		 			          are in the idle loop

		 while (!need_resched())
		       halt();

		 tick_nohz_restart_sched_tick(); <- disables NOHZ mode
		 preempt_enable_no_resched();
		 schedule();
		 preempt_disable();
	}
}

In hindsight we should have done this forever, but ... 

/me grabs a large brown paperbag.

Debugged-by: Jack Ren <jack.ren@marvell.com>, 
Debugged-by: eric miao <eric.y.miao@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-07-18 18:10:28 +02:00
Ingo Molnar
1a781a777b Merge branch 'generic-ipi' into generic-ipi-for-linus
Conflicts:

	arch/powerpc/Kconfig
	arch/s390/kernel/time.c
	arch/x86/kernel/apic_32.c
	arch/x86/kernel/cpu/perfctr-watchdog.c
	arch/x86/kernel/i8259_64.c
	arch/x86/kernel/ldt.c
	arch/x86/kernel/nmi_64.c
	arch/x86/kernel/smpboot.c
	arch/x86/xen/smp.c
	include/asm-x86/hw_irq_32.h
	include/asm-x86/hw_irq_64.h
	include/asm-x86/mach-default/irq_vectors.h
	include/asm-x86/mach-voyager/irq_vectors.h
	include/asm-x86/smp.h
	kernel/Makefile

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-15 21:55:59 +02:00
Linus Torvalds
af5329cdf5 Merge branch 'core/stacktrace' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core/stacktrace' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  generic-ipi: powerpc/generic-ipi tree build failure
  stacktrace: fix build failure on sparc64
  stacktrace: export save_stack_trace[_tsk]
  stacktrace: fix modular build, export print_stack_trace and save_stack_trace
  backtrace: replace timer with tasklet + completions
  stacktrace: add saved stack traces to backtrace self-test
  stacktrace: print_stack_trace() cleanup
  debugging: make stacktrace independent from DEBUG_KERNEL
  stacktrace: don't crash on invalid stack trace structs
2008-07-15 10:31:35 -07:00
Linus Torvalds
85082fd7cb Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (241 commits)
  [ARM] 5171/1: ep93xx: fix compilation of modules using clocks
  [ARM] 5133/2: at91sam9g20 defconfig file
  [ARM] 5130/4: Support for the at91sam9g20
  [ARM] 5160/1: IOP3XX: gpio/gpiolib support
  [ARM] at91: Fix NAND FLASH timings for at91sam9x evaluation kits.
  [ARM] 5084/1: zylonite: Register AC97 device
  [ARM] 5085/2: PXA: Move AC97 over to the new central device declaration model
  [ARM] 5120/1: pxa: correct platform driver names for PXA25x and PXA27x UDC drivers
  [ARM] 5147/1: pxaficp_ir: drop pxa_gpio_mode calls, as pin setting
  [ARM] 5145/1: PXA2xx: provide api to control IrDA pins state
  [ARM] 5144/1: pxaficp_ir: cleanup includes
  [ARM] pxa: remove pxa_set_cken()
  [ARM] pxa: allow clk aliases
  [ARM] Feroceon: don't disable BPU on boot
  [ARM] Orion: LED support for HP mv2120
  [ARM] Orion: add RD88F5181L-FXO support
  [ARM] Orion: add RD88F5181L-GE support
  [ARM] Orion: add Netgear WNR854T support
  [ARM] s3c2410_defconfig: update for current build
  [ARM] Acer n30: Minor style and indentation fixes.
  ...
2008-07-14 16:06:58 -07:00
Russell King
a177ba3b7a Merge branches 'at91', 'dyntick', 'ep93xx', 'iop', 'ixp', 'misc', 'orion', 'omap-reviewed', 'rpc', 'rtc' and 's3c' into devel 2008-07-10 16:38:50 +01:00
Russell King
9ecba1f288 [ARM] rpc: ecard: remove deprecated ecard_address() and relatives
ecard_address() is obsolete, and has been marked deprecated since
at least 2.6.12-rc2.  All in-tree users have been updated to use
the new approach, so it's time to remove this.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-07-03 14:25:58 +01:00
Ingo Molnar
7b4c9505f2 stacktrace: export save_stack_trace[_tsk]
Andrew Morton reported this against linux-next:

ERROR: ".save_stack_trace" [tests/backtracetest.ko] undefined!

Reported-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-03 09:17:55 +02:00
Jens Axboe
15c8b6c1aa on_each_cpu(): kill unused 'retry' parameter
It's not even passed on to smp_call_function() anymore, since that
was removed. So kill it.

Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-06-26 11:24:38 +02:00
Jens Axboe
f6dd9fa5a7 arm: convert to generic helpers for IPI function calls
This converts arm to use the new helpers for smp_call_function() and
friends, and adds support for smp_call_function_single().

Fixups and testing done by Catalin Marinas <catalin.marinas@arm.com>

Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-06-26 11:22:57 +02:00
Abhishek Sagar
395a59d0f8 ftrace: store mcount address in rec->ip
Record the address of the mcount call-site. Currently all archs except sparc64
record the address of the instruction following the mcount call-site. Some
general cleanups are entailed. Storing mcount addresses in rec->ip enables
looking them up in the kprobe hash table later on to check if they're kprobe'd.

Signed-off-by: Abhishek Sagar <sagar.abhishek@gmail.com>
Cc: davem@davemloft.net
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-23 22:10:56 +02:00
Nicolas Pitre
f76e915473 [ARM] latencytop support
Available for !SMP only at the moment.

From Russell:

|Basically, if a thread is running on a CPU, thread_saved_fp() is invalid.
|So, the question is: what guarantees do we have here that 'tsk' is not
|running on another CPU?

Signed-off-by: Nicolas Pitre <nico@marvell.com>
Tested-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
2008-06-22 22:44:36 +02:00
Abhishek Sagar
1d74f2a0f6 ftrace: remove ftrace_ip_converted()
Remove the unneeded function ftrace_ip_converted().

Signed-off-by: Abhishek Sagar <sagar.abhishek@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-10 11:57:49 +02:00
Abhishek Sagar
e077341024 ftrace: export kretprobe_trampoline for function tracer
Follow suit from kprobe implementations on other archs and make kretprobe_trampoline non-static. Ftrace implmentation (more specifically, kernel/trace/trace.c) requires access to it (see-> http://kerneltrap.org/mailarchive/linux-kernel/2008/5/27/1955234).

Signed-off-by: Abhishek Sagar <sagar.abhishek@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-02 13:32:10 +02:00
Abhishek Sagar
014c257cce ftrace: core support for ARM
Core ftrace support for the ARM architecture, which includes support
for dynamic function tracing.

Signed-off-by: Abhishek Sagar <sagar.abhishek@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-02 11:32:20 +02:00
Uwe Kleine-König
f7b0b939d5 clean up atags exporting code
This gets rid of two static variables (one of them being __initdata)
and a static function.

Signed-off-by: Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com>
Acked-by: Uli Luckas <u.luckas@road.de>
2008-05-30 10:33:49 +02:00
Uwe Kleine-König
8ff7f2a46b There is no need to have BOOT_PARAMS_SIZE known outside of atags.c
atags.c was the only user of KEXEC_BOOT_PARAMS_SIZE and kexec.h
was only included to get that definition.

Signed-off-by: Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com>
Acked-by: Uli Luckas <u.luckas@road.de>
2008-05-30 10:30:05 +02:00
Linus Torvalds
e23a5f6687 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6:
  [PATCH] return to old errno choice in mkdir() et.al.
  [Patch] fs/binfmt_elf.c: fix wrong return values
  [PATCH] get rid of leak in compat_execve()
  [Patch] fs/binfmt_elf.c: fix a wrong free
  [PATCH] avoid multiplication overflows and signedness issues for max_fds
  [PATCH] dup_fd() part 4 - race fix
  [PATCH] dup_fd() - part 3
  [PATCH] dup_fd() part 2
  [PATCH] dup_fd() fixes, part 1
  [PATCH] take init_files to fs/file.c
2008-05-19 16:37:45 -07:00
Adrian Bunk
7cc09c248f [ARM] arm/kernel/arthur.c: add MODULE_LICENSE
This patch adds the missing MODULE_LICENSE("GPL").

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-05-17 22:55:16 +01:00
Russell King
db2c439290 [ARM] export copy_page
Martin Michlmayr reported that fuse complains:
  ERROR: "copy_page" [fs/fuse/fuse.ko] undefined!

so export the needed function.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-05-17 22:55:12 +01:00
Al Viro
f52111b154 [PATCH] take init_files to fs/file.c
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2008-05-16 17:22:20 -04:00
Russell King
205bee6ad8 [ARM] dyntick: Remove obsolete and unused ARM dyntick support
dyntick is superseded by the clocksource/clockevent infrastructure,
using the NO_HZ configuration option.  No one implements dyntick on
ARM anymore, so it's pointless keeping it around.  Remove dyntick
support.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-05-12 17:39:14 +01:00
Ulrich Drepper
d35c7b0e54 unified (weak) sys_pipe implementation
This replaces the duplicated arch-specific versions of "sys_pipe()" with
one unified implementation.  This removes almost 250 lines of duplicated
code.

It's marked __weak, so that *if* an architecture wants to override the
default implementation it can do so by simply having its own replacement
version, since many architectures use alternate calling conventions for
the 'pipe()' system call for legacy reasons (ie traditional UNIX
implementations often return the two file descriptors in registers)

I still haven't changed the cris version even though Linus says the BKL
isn't needed.  The arch maintainer can easily do it if there are really
no obstacles.

Signed-off-by: Ulrich Drepper <drepper@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-05-03 13:50:33 -07:00
Linus Torvalds
d973664992 Merge master.kernel.org:/home/rmk/linux-2.6-arm
* master.kernel.org:/home/rmk/linux-2.6-arm: (26 commits)
  [ARM] pxa: fix 1c104e0e4f
  [ARM] serial: s3c2410: platform_get_irq() may return signed unnoticed
  [ARM] am79c961a: platform_get_irq() may return signed unnoticed
  [ARM] Feroceon: Feroceon-specific WA-cache compatible {copy,clear}_user_page()
  [ARM] Feroceon: fix function alignment in proc-feroceon.S
  [ARM] Orion: catch a couple more alternative spellings of PCIe
  [ARM] Orion: fix orion-ehci platform resource end addresses
  [ARM] Orion: fix ->map_irq() PCIe bus number check
  [ARM] Orion: fix ioremap() optimization
  [ARM] feroceon: remove CONFIG_CPU_CACHE_ROUND_ROBIN check
  [ARM] feroceon: remove CONFIG_CPU_DCACHE_WRITETHROUGH check
  kprobes/arm: fix decoding of arithmetic immediate instructions
  kprobes/arm: fix cache flush address for instruction stub
  [ARM] 5022/1: Race in ARM MMCI PL18x driver, V2
  [ARM] 5021/1: at91: buildfix for sam9263 + PM
  [ARM] 5018/1: RealView: Fix the ARM11MPCore Oprofile compilation
  [ARM] 5016/1: AT91: typo in mci configuration for at91cap at91sam9263
  [ARM] 5017/1: pxa3xx: Report unsupported wakeup sources in pxa3xx_set_wake()
  [ARM] 5020/1: magician: remove __devinit marker from pasic3_leds_info
  [ARM] 5014/1: Cleanup reset state before entering suspend or resetting.
  ...
2008-04-29 15:18:06 -07:00
Christoph Lameter
02cbe4749a arm: use kbuild.h instead of macros in asm-offsets.c
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29 08:06:29 -07:00
Alexey Dobriyan
9b0012126a proc: switch /proc/bus/ecard/devices to seq_file interface
Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Yani Ioannou <yani.ioannou@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29 08:06:19 -07:00
Alexey Dobriyan
c74c120a21 proc: remove proc_root from drivers
Remove proc_root export.  Creation and removal works well if parent PDE is
supplied as NULL -- it worked always that way.

So, one useless export removed and consistency added, some drivers created
PDEs with &proc_root as parent but removed them as NULL and so on.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29 08:06:18 -07:00
Alexey Dobriyan
9c37066d88 proc: remove proc_bus
Remove proc_bus export and variable itself. Using pathnames works fine
and is slightly more understandable and greppable.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29 08:06:18 -07:00
Lennert Buytenhek
a3fd133c24 kprobes/arm: fix decoding of arithmetic immediate instructions
The ARM kprobes arithmetic immediate instruction decoder
(space_cccc_001x()) was accidentally zero'ing out not only the Rn and
Rd arguments, but the lower nibble of the immediate argument as well
-- this patch fixes this.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Acked-by: Nicolas Pitre <nico@marvell.com>
2008-04-28 15:54:55 -04:00
Nicolas Pitre
8f79ff0cb5 kprobes/arm: fix cache flush address for instruction stub
It is more useful to flush the cache with the actual buffer address
rather than the address containing a pointer to the buffer.

Signed-off-by: Nicolas Pitre <nico@marvell.com>
Acked-by: Lennert Buytenhek <buytenh@marvell.com>
2008-04-28 15:54:37 -04:00
Russell King
cf816ecb53 Merge branch 'merge-fixes' into devel 2008-04-19 17:17:34 +01:00
Russell King
adf6d34e46 Merge branch 'omap2-upstream' into devel 2008-04-19 17:17:29 +01:00
Russell King
d1964dab60 Merge branches 'arm', 'at91', 'ep93xx', 'iop', 'ks8695', 'misc', 'mxc', 'ns9x', 'orion', 'pxa', 'sa1100', 's3c' and 'sparsemem' into devel 2008-04-19 17:17:25 +01:00
Russell King
28fab1a2fd [ARM] Fix kernel mode preemption
Luc Van Oostenryck reported:

  The code removed by this patch tested the irq_cpustat_t members
  __local_irq_count and __local_bh_count but these fields have
  been removed some time ago:

  http://git.kernel.org/?p=linux/kernel/git/tglx/history.git;a=commitdiff;h=3ab146c93e039dec99fec8d441a8dd046fe510cc

Fix this oversight.

Acked-by:  Bill Gatliff <bgat@billgatliff.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-04-19 11:28:09 +01:00
Lennert Buytenhek
84081bd220 [ARM] 4881/1: print unrecognised processor ID as part of failure message
If we fail to boot due to an unsupported processor ID, print the
processor ID as part of the failure message.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Acked-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-04-19 11:28:08 +01:00
Uwe Kleine-König
cbfc0f0406 [ARM] 4852/1: Add timerfd_create, timerfd_settime and timerfd_gettime syscall entries
Signed-off-by: Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-04-19 11:28:06 +01:00
Paul Brook
cb170a45d6 Linux Thumb-2 support for user-space applications
This patch implements Thumb-2 application support in Linux. Original
implementation by Paul Brook with fixes for VFP and Neon by Catalin
Marinas.

Signed-off-by: Paul Brook <paul@codesourcery.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2008-04-18 22:43:08 +01:00
Paul Brook
48d7927bdf Add a prefetch abort handler
This patch adds a prefetch abort handler similar to the data abort one
and renames the latter for consistency. Initial implementation by Paul
Brook with some renaming by Catalin Marinas.

Signed-off-by: Paul Brook <paul@codesourcery.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2008-04-18 22:43:07 +01:00
Catalin Marinas
d7f864be83 ARMv7: Add support for the ThumbEE state saving/restoring
This patch adds the detection and handling of the ThumbEE extension on
ARMv7 CPUs.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2008-04-18 22:43:06 +01:00
Matthew Wilcox
64ac24e738 Generic semaphore implementation
Semaphores are no longer performance-critical, so a generic C
implementation is better for maintainability, debuggability and
extensibility.  Thanks to Peter Zijlstra for fixing the lockdep
warning.  Thanks to Harvey Harrison for pointing out that the
unlikely() was unnecessary.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
2008-04-17 10:42:34 -04:00
Riku Voipio
c60afe1014 [ARM] 4878/1: Add oabi shim for fstatat64
Ccoreutils and other have started using fstatat64. Thus, we
need a shim for it if we want to support modern oldabi
userlands (such as Debian/arm/lenny) with EABI kernels.

See http://bugs.debian.org/462677

Acked-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Riku Voipio <riku.voipio@movial.fi>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-03-28 15:00:46 +00:00
janboe
ee4cd588a3 [ARM] 4870/1: fix signal return code when enable CONFIG_OABI_COMPAT
fix signal return code when enable CONFIG_OABI_COMPAT

Signed-off-by: Janboe Ye <janboe.ye@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-03-20 15:59:31 +00:00
Greg Ungerer
9c4c9f3879 [ARM] 4849/1: move ATAGS asm definitions
Move the definitions of ATAG_CORE and ATAG_CORE_SIZE in head.S to
head-common.S. There is no use of these in head.S itself, but they
are used in head-common.S. When building for the !CONFIG_MMU case
these were not defined when compiling head-nommu.S (which includes
head-common.S).

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-03-06 12:18:18 +00:00
Nicolas Pitre
b24061fadc [ARM] 4847/1: kprobes: fix compilation with CONFIG_DEBUG_FS=y
Signed-off-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-03-06 12:18:18 +00:00
Jan Engelhardt
2ffd6e182c [ARM] constify function pointer tables
Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-02-09 22:46:44 +00:00
David Howells
1eb1141123 aout: remove unnecessary inclusions of {asm, linux}/a.out.h
Remove now unnecessary inclusions of {asm,linux}/a.out.h.

[akpm@linux-foundation.org: fix alpha build]
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-08 09:22:30 -08:00
David Howells
7fa3031500 aout: suppress A.OUT library support if !CONFIG_ARCH_SUPPORTS_AOUT
Suppress A.OUT library support if CONFIG_ARCH_SUPPORTS_AOUT is not set.

Not all architectures support the A.OUT binfmt, so the ELF binfmt should not
be permitted to go looking for A.OUT libraries to load in such a case.  Not
only that, but under such conditions A.OUT core dumps are not produced either.

To make this work, this patch also does the following:

 (1) Makes the existence of the contents of linux/a.out.h contingent on
     CONFIG_ARCH_SUPPORTS_AOUT.

 (2) Renames dump_thread() to aout_dump_thread() as it's only called by A.OUT
     core dumping code.

 (3) Moves aout_dump_thread() into asm/a.out-core.h and makes it inline.  This
     is then included only where needed.  This means that this bit of arch
     code will be stored in the appropriate A.OUT binfmt module rather than
     the core kernel.

 (4) Drops A.OUT support for Blackfin (according to Mike Frysinger it's not
     needed) and FRV.

This patch depends on the previous patch to move STACK_TOP[_MAX] out of
asm/a.out.h and into asm/processor.h as they're required whether or not A.OUT
format is available.

[jdike@addtoit.com: uml: re-remove accidentally restored code]
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-08 09:22:30 -08:00
Benjamin Herrenschmidt
5e5419734c add mm argument to pte/pmd/pud/pgd_free
(with Martin Schwidefsky <schwidefsky@de.ibm.com>)

The pgd/pud/pmd/pte page table allocation functions get a mm_struct pointer as
first argument.  The free functions do not get the mm_struct argument.  This
is 1) asymmetrical and 2) to do mm related page table allocations the mm
argument is needed on the free function as well.

[kamalesh@linux.vnet.ibm.com: i386 fix]
[akpm@linux-foundation.org: coding-syle fixes]
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05 09:44:18 -08:00
Davide Libenzi
4d672e7ac7 timerfd: new timerfd API
This is the new timerfd API as it is implemented by the following patch:

int timerfd_create(int clockid, int flags);
int timerfd_settime(int ufd, int flags,
		    const struct itimerspec *utmr,
		    struct itimerspec *otmr);
int timerfd_gettime(int ufd, struct itimerspec *otmr);

The timerfd_create() API creates an un-programmed timerfd fd.  The "clockid"
parameter can be either CLOCK_MONOTONIC or CLOCK_REALTIME.

The timerfd_settime() API give new settings by the timerfd fd, by optionally
retrieving the previous expiration time (in case the "otmr" parameter is not
NULL).

The time value specified in "utmr" is absolute, if the TFD_TIMER_ABSTIME bit
is set in the "flags" parameter.  Otherwise it's a relative time.

The timerfd_gettime() API returns the next expiration time of the timer, or
{0, 0} if the timerfd has not been set yet.

Like the previous timerfd API implementation, read(2) and poll(2) are
supported (with the same interface).  Here's a simple test program I used to
exercise the new timerfd APIs:

http://www.xmailserver.org/timerfd-test2.c

[akpm@linux-foundation.org: coding-style cleanups]
[akpm@linux-foundation.org: fix ia64 build]
[akpm@linux-foundation.org: fix m68k build]
[akpm@linux-foundation.org: fix mips build]
[akpm@linux-foundation.org: fix alpha, arm, blackfin, cris, m68k, s390, sparc and sparc64 builds]
[heiko.carstens@de.ibm.com: fix s390]
[akpm@linux-foundation.org: fix powerpc build]
[akpm@linux-foundation.org: fix sparc64 more]
Signed-off-by: Davide Libenzi <davidel@xmailserver.org>
Cc: Michael Kerrisk <mtk-manpages@gmx.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Davide Libenzi <davidel@xmailserver.org>
Cc: Michael Kerrisk <mtk-manpages@gmx.net>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Davide Libenzi <davidel@xmailserver.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05 09:44:07 -08:00
Russell King
0d899e1b00 Merge branches 'at91', 'ixp', 'master', 'misc', 'pxa' and 'realview' into devel
* at91:
  [ARM] 4802/1: Fix typo and remove vague comment
  [ARM] 4660/3: at91: allow selecting UART for early kernel messages
  [ARM] 4739/1: at91sam9263: make gpio bank C and D irqs work

* ixp:
  [ARM] 4809/2: ixp4xx: Merge dsmg600-power.c into dsmg600-setup.c
  [ARM] 4808/2: ixp4xx: Merge nas100d-power.c into nas100d-setup.c
  [ARM] 4807/2: ixp4xx: Merge nslu2-power.c into nslu2-setup.c
  [ARM] 4806/1: ixp4xx: Ethernet support for the nslu2 and nas100d boards
  [ARM] 4805/1: ixp4xx: Use leds-gpio driver instead of IXP4XX-GPIO-LED driver
  [ARM] 4715/2: Ethernet support for IXDP425 boards
  [ARM] 4714/2: Headers for IXP4xx built-in Ethernet and WAN drivers
  [ARM] 4713/3: Adds drivers for IXP4xx QMgr and NPE features
  [ARM] 4712/2: Adds functions to read and write IXP4xx "feature" bits
  [ARM] 4774/2: ixp4xx: Register dsmg600 rtc i2c_board_info
  [ARM] 4773/2: ixp4xx: Register nas100d rtc i2c_board_info
  [ARM] 4772/2: ixp4xx: Register nslu2 rtc i2c_board_info
  [ARM] 4769/2: ixp4xx: Button updates for the dsmg600 board
  [ARM] 4768/2: ixp4xx: Button and LED updates for the nas100d board
  [ARM] 4767/2: ixp4xx: Add bitops.h include to io.h
  [ARM] 4766/2: ixp4xx: Update ixp4xx_defconfig, enabling all supported boards

* master:
  [ARM] 4810/1: - Fix 'section mismatch' building warnings
  [ARM] xtime_seqlock: fix more ARM machines for xtime deadlocking
  [ARM] 21285 serial: fix build error

* misc:
  [ARM] 4736/1: Export atags to userspace and allow kexec to use customised atags

* pxa:
  [ARM] 4798/1: pcm027: fix missing header file
  [ARM] 4803/1: pxa: fix building issue of poodle.c caused by patch 4737/1
  [ARM] 4801/1: pxa: fix building issues of missing pxa2xx-regs.h
  [ARM] pxa: introduce sysdev for pxa3xx static memory controller
  [ARM] pxa: add preliminary suspend/resume code for pxa3xx
  [ARM] pxa: introduce sysdev for GPIO register saving/restoring
  [ARM] pxa: introduce sysdev for IRQ register saving/restoring
  [ARM] pxa: fix the warning of undeclared "struct pxaohci_platform_data"
  [ARM] pxa: change set_kset_name() to direct name assignment for MFP sysclass

* realview:
  [ARM] 4822/1: RealView: Change the REALVIEW_MPCORE configuration option
  [ARM] 4821/1: RealView: Remove the platform dependencies from localtimer.c
  [ARM] 4820/1: RealView: Select the timer IRQ at run-time
  [ARM] 4819/1: RealView: Fix entry-macro.S to work with multiple platforms
  [ARM] 4818/1: RealView: Add core-tile detection
  [ARM] 4817/1: RealView: Move the AMBA resource definitions to realview_eb.c
  [ARM] 4816/1: RealView: Move the platform-specific definitions into board-eb.h
  [ARM] 4815/1: RealView: Add clockevents suport for the local timers
  [ARM] 4814/1: RealView: Add broadcasting clockevents support for ARM11MPCore
  [ARM] 4813/1: Add SMP helper functions for clockevents support
  [ARM] 4812/1: RealView: clockevents support for the RealView platforms
  [ARM] 4811/1: RealView: clocksource support for the RealView platforms
2008-02-04 17:54:39 +00:00
Catalin Marinas
a8655e83fc [ARM] 4814/1: RealView: Add broadcasting clockevents support for ARM11MPCore
This patch adds dummy local timers for each CPU so that the board clock
device is used to broadcast events to the other CPUs. The patch also
adds the declaration for the dummy_timer_setup function (the equivalent
of local_timer_setup when CONFIG_LOCAL_TIMERS is not set).

Due to the way clockevents work, the dummy timer on the first CPU has to
be registered before the board timer.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-02-04 17:52:19 +00:00
Catalin Marinas
3e45999096 [ARM] 4813/1: Add SMP helper functions for clockevents support
This patch adds the smp_call_function_single and smp_timer_broadcast
functions and modifies ipi_timer to call the platform-specific function
local_timer_interrupt.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-02-04 17:52:18 +00:00
Richard Purdie
4cd9d6f774 [ARM] 4736/1: Export atags to userspace and allow kexec to use customised atags
Currently, the atags used by kexec are fixed to the ones originally used
to boot the kernel. This is less than ideal as changing the commandline,
initrd and other options would be a useful feature.

This patch exports the atags used for the current kernel to userspace
through an "atags" file in procfs. The presence of the file is
controlled by its own Kconfig option and cleans up several ifdef blocks
into a separate file. The tags for the new kernel are assumed to be at
a fixed location before the kernel image itself. The location of the
tags used to boot the original kernel is unimportant and no longer
saved.

Based on a patch from Uli Luckas <u.luckas@road.de>

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Acked-by: Uli Luckas <u.luckas@road.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-02-04 13:21:03 +00:00
Krzysztof Halasa
c18f65816e [ARM] 4712/2: Adds functions to read and write IXP4xx "feature" bits
Adds functions to read and write IXP4xx "feature" (aka "fuse")
bits, containing information about available/enabled CPU features.

The uncompress.h included by boot/compressed/misc.c resides in
a different space than rest of the kernel and thus can't use
asm/hardware.h (including asm/arch/cpu.h - which, in turn, may use
EXPORTed symbol "processor_id").

Posted to linux-arm-kernel on 2 Dec 2007 and revised.

Signed-off-by: Krzysztof Halasa <khc@pm.waw.pl>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-02-04 13:15:25 +00:00
Sam Ravnborg
01ba2bdc6b all archs: consolidate init and exit sections in vmlinux.lds.h
This patch consolidate all definitions of .init.text, .init.data
and .exit.text, .exit.data section definitions in
the generic vmlinux.lds.h.

This is a preparational patch - alone it does not buy
us much good.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2008-01-28 23:21:17 +01:00
Russell King
d0d42df2a4 Merge branches 'at91', 'ep93xx', 'iop', 'kprobes', 'ks8695', 'misc', 'msm', 's3c2410', 'sa1100' and 'vfp' into devel
* at91: (24 commits)
  [ARM] 4615/4: sam926[13]ek buttons updated
  [ARM] 4765/1: [AT91] AT91CAP9A-DK board support
  [ARM] 4764/1: [AT91] AT91CAP9 core support
  [ARM] 4738/1: at91sam9261: Remove udc pullup enabling in board initialisation
  [ARM] 4761/1: [AT91] Board-support for NEW_LEDs
  [ARM] 4760/1: [AT91] SPI CS0 errata on AT91RM9200
  [ARM] 4759/1: [AT91] Buttons on CSB300
  [ARM] 4758/1: [AT91] LEDs
  [ARM] 4757/1: [AT91] UART initialization
  [ARM] 4756/1: [AT91] Makefile cleanup
  [ARM] 4755/1: [AT91] NAND update
  [ARM] 4754/1: [AT91] SSC library support
  [ARM] 4753/1: [AT91] Use DMA_BIT_MASK
  [ARM] 4752/1: [AT91] RTT, RTC and WDT peripherals on SAM9
  [ARM] 4751/1: [AT91] ISI peripheral on SAM9263
  [ARM] 4750/1: [AT91] STN LCD displays on SAM9261
  [ARM] 4734/1: at91sam9263ek: include IRQ for Ethernet PHY
  [ARM] 4646/1: AT91: configurable HZ, default to 128
  [ARM] 4688/1: at91: speed-up irq processing
  [ARM] 4657/1: AT91: Header definition update
  ...

* ep93xx:
  [ARM] 4671/1: ep93xx: remove obsolete gpio_line_* operations
  [ARM] 4670/1: ep93xx: implement IRQT_BOTHEDGE gpio irq sense type
  [ARM] 4669/1: ep93xx: simplify GPIO code and cleanups
  [ARM] 4668/1: ep93xx: implement new GPIO API

* iop:
  [ARM] 4770/1: GLAN Tank: correct physmap_flash_data width field
  [ARM] 4732/1: GLAN Tank: register rtc-rs5c372 i2c device
  [ARM] 4708/1: iop: update defconfigs for 2.6.24

* kprobes:
  ARM kprobes: let's enable it
  ARM kprobes: special hook for the kprobes breakpoint handler
  ARM kprobes: prevent some functions involved with kprobes from being probed
  ARM kprobes: don't let a single-stepped stmdb corrupt the exception stack
  ARM kprobes: add the kprobes hook to the page fault handler
  ARM kprobes: core code
  ARM kprobes: instruction single-stepping support

* ks8695:
  [ARM] 4603/1: KS8695: debugfs interface to view pin state
  [ARM] 4601/1: KS8695: PCI support

* misc:
  [ARM] remove duplicate includes
  [ARM] CONFIG_DEBUG_STACK_USAGE
  [ARM] 4689/1: small comment wrap fix
  [ARM] 4687/1: Trivial arch/arm/kernel/entry-common.S comment fix
  [ARM] 4666/1: ixp4xx: fix sparse warnings in include/asm-arm/arch-ixp4xx/io.h
  [ARM] remove reference to non-existent MTD_OBSOLETE_CHIPS
  [SERIAL] 21285: Report baud rate back via termios
  [ARM] Remove pointless casts from void pointers,
  [ARM] Misc minor interrupt handler cleanups
  [ARM] Remove at91_lcdc.h
  [ARM] ARRAY_SIZE() cleanup
  [ARM] Update mach-types

* msm:
  [ARM] msm: dma support for MSM7X00A
  [ARM] msm: board file for MACH_HALIBUT (QCT MSM7200A)
  [ARM] msm: irq and timer support for ARCH_MSM7X00A
  [ARM] msm: core platform support for ARCH_MSM7X00A

* s3c2410: (33 commits)
  [ARM] 4795/1: S3C244X: Add armclk and setparent call
  [ARM] 4794/1: S3C24XX: Comonise S3C2440 and S3C2442 clock code
  [ARM] 4793/1: S3C24XX: Add IRQ->GPIO pin mapping function
  [ARM] 4792/1: S3C24XX: Remove warnings from debug-macro.S
  [ARM] 4791/1: S3C2412: Make fclk a parent of msysclk
  [ARM] 4790/1: S3C2412: Fix parent selection for msysclk.
  [ARM] 4789/1: S3C2412: Add missing CLKDIVN register values
  [ARM] 4788/1: S3C24XX: Fix paramet to s3c2410_dma_ctrl if S3C2410_DMAF_AUTOSTART used.
  [ARM] 4787/1: S3C24XX: s3c2410_dma_request() should return the allocated channel number
  [ARM] 4786/1: S3C2412: Add SPI FIFO controll constants
  [ARM] 4785/1: S3C24XX: Add _SHIFT definitions for S3C2410_BANKCON registers
  [ARM] 4784/1: S3C24XX: Fix GPIO restore glitches
  [ARM] 4783/1: S3C24XX: Add s3c2410_gpio_getpull()
  [ARM] 4782/1: S3C24XX: Define FIQ_START for any FIQ users
  [ARM] 4781/1: S3C24XX: DMA suspend and resume support
  [ARM] 4780/1: S3C2412: Allow for seperate DMA channels for TX and RX
  [ARM] 4779/1: S3C2412: Add s3c2412_gpio_set_sleepcfg() call
  [ARM] 4778/1: S3C2412: Add armclk and init from DVS state
  [ARM] 4777/1: S3C24XX: Ensure clk_set_rate() checks the set_rate method for the clk
  [ARM] 4775/1: s3c2410: fix compilation error if only s3c2442 cpu is selected
  ...

* sa1100:
  [ARM] sa1100: add clock source support

* vfp:
  [ARM] 4584/2: ARMv7: Add Advanced SIMD (NEON) extension support
  [ARM] 4583/1: ARMv7: Add VFPv3 support
  [ARM] 4582/2: Add support for the common VFP subarchitecture
2008-01-28 13:21:21 +00:00
Russell King
193c3cc125 [ARM] Fix timer damage from d3d74453c3
Move the xtime write mode seqlock into timer_tick(), so it only
surrounds the call to do_timer().

This avoids a deadlock in update_process_times() ...
hrtimer_get_softirq_time() which tries to get a read mode seqlock
on xtime, thereby preventing booting.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-01-28 10:17:12 +00:00
Nicolas Pitre
796969104c ARM kprobes: special hook for the kprobes breakpoint handler
The kprobes code is already able to cope with reentrant probes, so its
handler must be called outside of the region protected by undef_lock.

If ever this lock is released when handlers are called then this commit
could be reverted.

Signed-off-by: Nicolas Pitre <nico@marvell.com>
2008-01-26 15:25:17 +00:00
Nicolas Pitre
785d3cd286 ARM kprobes: prevent some functions involved with kprobes from being probed
Signed-off-by: Nicolas Pitre <nico@marvell.com>
2008-01-26 15:25:17 +00:00
Nicolas Pitre
d30a0c8bf9 ARM kprobes: don't let a single-stepped stmdb corrupt the exception stack
If kprobes installs a breakpoint on a "stmdb sp!, {...}" instruction,
and then single-step it by simulation from the exception context, it will
corrupt the saved regs on the stack from the previous context.

To avoid this, let's add an optional parameter to the svc_entry macro
allowing for a hole to be created on the stack before saving the
interrupted context, and use it in the undef_svc handler when kprobes
is enabled.

Signed-off-by: Nicolas Pitre <nico@marvell.com>
2008-01-26 15:25:17 +00:00
Abhishek Sagar
24ba613c9d ARM kprobes: core code
This is a full implementation of Kprobes including Jprobes and
Kretprobes support.

This ARM implementation does not follow the usual kprobes double-
exception model. The traditional model is where the initial kprobes
breakpoint calls kprobe_handler(), which returns from exception to
execute the instruction in its original context, then immediately
re-enters after a second breakpoint (or single-stepping exception)
into post_kprobe_handler(), each time the probe is hit..  The ARM
implementation only executes one kprobes exception per hit, so no
post_kprobe_handler() phase. All side-effects from the kprobe'd
instruction are resolved before returning from the initial exception.
As a result, all instructions are _always_ effectively boosted
regardless of the type of instruction, and even regardless of whether
or not there is a post-handler for the probe.

Signed-off-by: Abhishek Sagar <sagar.abhishek@gmail.com>
Signed-off-by: Quentin Barnes <qbarnes@gmail.com>
Signed-off-by: Nicolas Pitre <nico@marvell.com>
2008-01-26 15:25:16 +00:00
Quentin Barnes
35aa1df432 ARM kprobes: instruction single-stepping support
This is the code implementing instruction single-stepping for kprobes
on ARM.

To get around the limitation of no Next-PC and no hardware single-
stepping, all kprobe'd instructions are split into three camps:
simulation, emulation, and rejected. "Simulated" instructions are
those instructions which behavior is reproduced by straight C code.
"Emulated" instructions are ones that are copied, slightly altered
and executed directly in the instruction slot to reproduce their
behavior.  "Rejected" instructions are ones that could be simulated,
but work hasn't been put into simulating them. These instructions
should be very rare, if not unencountered, in the kernel. If ever
needed, code could be added to simulate them.

One might wonder why this and the ptrace singlestep facility are not
sharing some code.  Both approaches are fundamentally different because
the ptrace code regains control after the stepped instruction by installing
a breakpoint after the instruction itself, and possibly at the location
where the instruction might be branching to, instead of simulating or
emulating the target instruction.

The ptrace approach isn't suitable for kprobes because the breakpoints
would have to be moved back, and the icache flushed, everytime the
probe is hit to let normal code execution resume, which would have a
significant performance impact. It is also racy on SMP since another
CPU could, with the right timing, sail through the probe point without
being caught.  Because ptrace single-stepping always result in a
different process to be scheduled, the concern for performance is much
less significant.

On the other hand, the kprobes approach isn't (currently) suitable for
ptrace because it has no provision for proper user space memory
protection and translation, and even if that was implemented, the gain
wouldn't be worth the added complexity in the ptrace path compared to
the current approach.

So, until kprobes does support user space, both kprobes and ptrace are
best kept independent and separate.

Signed-off-by: Quentin Barnes <qbarnes@gmail.com>
Signed-off-by: Abhishek Sagar <sagar.abhishek@gmail.com>
Signed-off-by: Nicolas Pitre <nico@marvell.com>
2008-01-26 15:25:16 +00:00
Nicolas Pitre
70b6f2b4af [ARM] 4689/1: small comment wrap fix
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-01-26 14:50:05 +00:00
George G. Davis
7b544c99e0 [ARM] 4687/1: Trivial arch/arm/kernel/entry-common.S comment fix
Make the comment match the code

Signed-off-by: George G. Davis <gdavis@mvista.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-01-26 14:50:04 +00:00
Alejandro Martinez Ruiz
df1a290320 [ARM] ARRAY_SIZE() cleanup
Signed-off-by: Alejandro Martinez Ruiz <alex@flawedcode.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-01-26 14:49:57 +00:00
Catalin Marinas
b5872db4a2 [ARM] 4584/2: ARMv7: Add Advanced SIMD (NEON) extension support
This patch enables the use of the Advanced SIMD (NEON) extension on
ARMv7. The NEON technology is a 64/128-bit hybrid SIMD architecture
for accelerating the performance of multimedia and signal processing
applications. The extension shares the registers with the VFP unit and
enabling/disabling and saving/restoring follow the same rules. In
addition, there are instructions that do not have the appropriate CP
number encoded, the checks being made in the call_fpe function.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-01-26 14:44:02 +00:00
Ingo Molnar
b842271fbb sched: remove printk_clock()
printk_clock() is obsolete - it has been replaced with cpu_clock().

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-25 21:07:59 +01:00
Kay Sievers
af5ca3f4ec Driver core: change sysdev classes to use dynamic kobject names
All kobjects require a dynamically allocated name now. We no longer
need to keep track if the name is statically assigned, we can just
unconditionally free() all kobject names on cleanup.

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-01-24 20:40:40 -08:00
Nicolas Pitre
d28a170d5b [ARM] 4665/1: fix __und_usr wrt accessing the undefined insn in user space
The ldrt fixup code expects r9 to be set.

Signed-off-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-11-26 19:44:02 +00:00
Nicolas Pitre
b49c0f24cf [ARM] 4659/1: remove possibilities for spurious false negative with __kuser_cmpxchg
The ARM __kuser_cmpxchg routine is meant to implement an atomic cmpxchg
in user space.  It however can produce spurious false negative if a
processor exception occurs in the middle of the operation.  Normally
this is not a problem since cmpxchg is typically called in a loop until
it succeeds to implement an atomic increment for example.

Some use cases which don't involve a loop require that the operation be
100% reliable though.  This patch changes the implementation so to
reattempt the operation after an exception has occurred in the critical
section rather than abort it.

Here's a simple program to test the fix (don't use CONFIG_NO_HZ in your
kernel as this depends on a sufficiently high interrupt rate):

	#include <stdio.h>

	typedef int (__kernel_cmpxchg_t)(int oldval, int newval, int *ptr);
	#define __kernel_cmpxchg (*(__kernel_cmpxchg_t *)0xffff0fc0)

	int main()
	{
		int i, x = 0;
		for (i = 0; i < 100000000; i++) {
			int v = x;
			if (__kernel_cmpxchg(v, v+1, &x))
				printf("failed at %d: %d vs %d\n", i, v, x);
		}
		printf("done with %d vs %d\n", i, x);
		return 0;
	}

Signed-off-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-11-26 19:43:58 +00:00