SH is able to support a complete futex implementation on UP by way
of gUSA. However, IRQ toggling must be done for the old CPUs that
don't have movli.l/movco.l (LL/SC) instructions. Provide a default
implementation that does this, so it's possible to optimize for
newer CPUs.
Follows the same scheme as the current asm-sh/atomic-*.h headers.
Signed-off-by: Kaz Kojima <kkojima@rr.iij4u.or.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This patch reworks the ipr code by grouping the offset array together
with the ipr_data structure in a new data structure called ipr_desc.
This new structure also contains the name of the controller in struct
irq_chip. The idea behind putting struct irq_chip in there is that we
can use offsetof() to locate the base addresses in the irq_chip
callbacks. This strategy has much in common with the recently merged
intc2 code.
One logic change has been made - the original ipr code enabled the
interrupts by default but with this patch they are all disabled by
default.
Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
We don't have a PMB for SH-X2 or later, so only enable it for
the few CPUs that support it. Fixes up the boot for SH4AL-DSP.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
The shared intc2 code currently contains cpu-specific #ifdefs.
This is a tad unclean and it prevents us from using the shared code
to drive board-specific irqs on the se7780 board.
This patch reworks the intc2 code by moving the base addresses of
the intc2 registers into struct intc2_desc. This new structure also
contains the name of the controller in struct irq_chip. The idea
behind putting struct irq_chip in there is that we can use offsetof()
to locate the base addresses in the irq_chip callbacks.
One logic change has been made - the original shared intc2 code
enabled the interrupts by default but with this patch they are all
disabled by default.
Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
There's no point in keeping these around, they've been broken
for some time, and the dmaenging/async_tx framework provides a
far more reasonable interface.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
SH can turn CONFIG_MMU on and off, don't let us get to a state
where hugetlbfs/hugetlbpage gets built when building for nommu.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
SH-2 can presently get in to some pretty bogus states, so
we tidy up the dependencies a bit and get it all building
again.
This gets us a bit closer to a functional allyesconfig
and allmodconfig, though there are still a few things to
fix up.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This was added during 2.5.x, but was never moved along. This
can easily be resurrected if someone has one they wish to work
with, but it's not worth keeping around in its current form.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This enables simple hotplug support for sparsemem users. Presently
this only permits memory being added in to node 0 on ZONE_NORMAL.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Currently cpu_to_node() is always 0 in the UP case, though
we do want to have the CPU association linked in under sysfs
even in the cases where we're only on a single CPU.
Fix this up, so we have the cpu0 link on all of the available
nodes that don't already have a CPU link of their own.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This adds the URAM block on SH7722 as a separate node.
Sparsemem is required for this, or it can simply be disabled
by explicitly selecting a flatmem model.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This adds basic support for multiple nodes on SH machines.
This is primarily useful for boards with many different
memory blocks that are otherwise unused (SH7722/SH7785 URAM
and so forth).
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Currently using multiple nodes tramples the ZONE_NORMAL
max low pfn, tidy up the logic a bit to get it all working
as expected.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Slub currently defaults to 8-byte alignment for the kmalloc
and slab minalign values, where 4 will suffice. In the slab
case BYTES_PER_WORD == 4 already, so defining the minalign
values outright doesn't cause any regressions there either.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Some compilers don't support the explicit CPU tuning, while binutils
is still able to handle the special subtype-specific opcodes. Make
the CFLAG optional, falling back on the compiler default if nothing
better exists.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
We have to call in to sparse_memory_present_with_active_regions()
earlier in order for sparsemem to be happy. This was being called
too late, and was causing troubles with the platforms that needed
to enable sparsemem.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This implements basic sparsemem support for SH. Presently this only
uses static sparsemem, and we still permit explicit selection of
flatmem. Those boards that want sparsemem can select it as usual.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
pfn_valid() is already defined in the sparsemem case, so we only
need to define this for CONFIG_FLATMEM.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
.machvec.init can be misaligned with the recent machvec changes,
forcibly align it on the boundary that it expects, as before.
Signed-off-by: Takashi YOSHII <takashi.yoshii.ze@hitachi.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Now that select no longer works for selecting the "closest" CPU,
we have to explicitly reference the precise sub-type in the few
places where it actually matters (presently only setup code and
some legacy sh-sci cruft).
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This kills off the BareCPU board as a "special" machvec, rather,
we leave this as a default for when no other vector is available,
or when we want to use it in combination with other vectors for
testing with generic ops. As sh_mv is copied out anyways (or
overloaded when an alternate vector is explicitly selected), this
doesn't consume any additional memory.
The generic machvec can be forcibly selected with sh_mv=generic,
or by not having any other boards enabled.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
We now throw all of the machvecs in to .machvec.init and either
select one on the command line, or copy out the first (and
usually only) one to sh_mv. The rest are freed as usual.
This gets rid of all of the silly sh_mv aliasing and makes the
selection explicit rather than link-order dependent.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This tidies up the build rules and permits multiple boards to be
linked in to the same kernel. The earlier Kconfig work ensures that
the CPU configuration is consistent across the boards, as this is
the only thing that we can't do dynamically.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This was a big mess, rework the logic a bit so that we constrain
to a particular subtype and figure out the board support based
on that. This makes building subtype specific kernels supporting
multiple boards possible again.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This fixes up much of the machvec handling, allowing for it to be
overloaded on boot. Making practical use of this still requires
some Kconfig munging, however.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This adds in some more __user annotations. These weren't being
handled properly in some of the __get_user and __put_user paths,
so tidy those up.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Split out the CPU topology initialization to a separate file,
and switch it to a percpu type, rather than an NR_CPUS array.
At the same time, switch to only registering present CPUs,
rather than using the possible CPU map.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This bug was caught by LTP testcase fchmod06 on Blackfin platform.
In the manpage of fchmod, "EPERM: The effective UID does not match the
owner of the file, and the process is not privileged (Linux: it does not
have the CAP_FOWNER capability)."
But the ramfs nommu code missed the inode_change_ok POSIX UID/GID
verification. This patch fixed this.
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* git://git.linux-xtensa.org/kernel/xtensa-feed:
Xtensa: use asm-generic/fcntl.h
[XTENSA] Remove non-rt signal handling
[XTENSA] Move common sections into bss sections
[XTENSA] clean-up header files
[XTENSA] Use generic 64-bit division
[XTENSA] Remove multi-exported symbols from xtensa_ksyms.c
[XTENSA] fix sources using deprecated assembler directive
[XTENSA] Spelling fixes in arch/xtensa
[XTENSA] fix bit operations in bitops.h
* 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: (24 commits)
xfrm: Add security check before flushing SAD/SPD
[NET_SCHED]: Fix filter double free
[NET]: Avoid duplicate netlink notification when changing link state
[UDP]: Revert 2-pass hashing changes.
[AF_UNIX]: Fix stream recvmsg() race.
[NETFILTER]: nf_conntrack_amanda: fix textsearch_prepare() error check
[NETFILTER]: ip_tables: fix compat related crash
[NETFILTER]: nf_conntrack: fix helper module unload races
[RTNETLINK]: ifindex 0 does not exist
[NETLINK]: Mark netlink policies const
[TCP] tcp_probe: Attach printf attribute properly to printl().
[TCP]: Use LIMIT_NETDEBUG in tcp_retransmit_timer().
[NET]: Merge dst_discard_in and dst_discard_out.
[RFKILL]: Make rfkill->name const
[IPV4]: Restore old behaviour of default config values
[IPV4]: Add default config support after inetdev_init
[IPV4]: Convert IPv4 devconf to an array
[IPV4]: Only panic if inetdev_init fails for loopback
[TCP]: Honour sk_bound_dev_if in tcp_v4_send_ack
[BNX2]: Update version and reldate.
...
This is a minor fix, but what is currently there is essentially wrong.
In do_page_fault, if the faulting address from user code happens to be
in kernel address space (int *p = (int*)-1; p = 0xbed;) then the
do_page_fault handler will jump over the local_irq_enable with the
goto bad_area_nosemaphore;
But the first line there sees this is user code and goes through the
process of sending a signal to send SIGSEGV to the user task. This whole
time interrupts are disabled and the task can not be preempted by a
higher priority task.
This patch always enables interrupts in the user path of the
bad_area_nosemaphore.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
