Commit Graph

65371 Commits

Author SHA1 Message Date
Ralf Baechle
fef74705ea [MIPS] Type proof reimplementation of cmpxchg.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-03 14:30:52 +01:00
Maciej W. Rozycki
f6a9e6dec5 [MIPS] pg-r4k.c: Fix a typo in an R4600 v2 erratum workaround
Restore a load from KSEG1 done as a workaround for an R4600 v2
erratum, dropped with 211be16de99a7424e66c0b6c0d00e2c970508ac2.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-03 14:30:51 +01:00
Richard Knutsson
ee0a8169b6 [PATCH] softmac: Fix compiler-warning
CC      net/ieee80211/softmac/ieee80211softmac_wx.o
/home/kernel/src/net/ieee80211/softmac/ieee80211softmac_wx.c: In function ‘ieee80211softmac_wx_set_essid’:
/home/kernel/src/net/ieee80211/softmac/ieee80211softmac_wx.c:117: warning: label ‘out’ defined but not used

due to commit: efe870f9f4. Removing the label.

Signed-off-by: Richard Knutsson <ricknu-0@student.ltu.se>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2007-10-02 19:41:33 -04:00
David S. Miller
a4aa2e867c [SPARC64]: Don't use in/local regs for ldx/stx data in N1 memcpy.
It doesn't matter for use in 64-bit objects, but when used in
32-bit environments the top 32-bits of the local and in
registers will get chopped off on the next register window
spill/restore which leads to difficult to track down and
subtle bugs.

Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-02 16:17:17 -07:00
Joe Perches
4365e99f95 [PATCH] bcm43xx: Correct printk with PFX before KERN_
Correct printk with PFX before KERN_ in bcm43xx_wx.c

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2007-10-02 17:04:22 -04:00
Linus Torvalds
f778089cb2 Merge branch 'sas-fixes' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/misc-2.6
* 'sas-fixes' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/misc-2.6:
  aic94xx: fix DMA data direction for SMP requests
2007-10-02 10:41:06 -07:00
Linus Torvalds
db7a89db5e Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6
* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6:
  dm9601: Fix receive MTU
  mv643xx_eth: Do not modify struct netdev tx_queue_len
  qla3xxx: bugfix: Fix VLAN rx completion handling.
  qla3xxx: bugfix: Add memory barrier before accessing rx completion.
2007-10-02 10:40:40 -07:00
Linus Torvalds
2910ca6f8a Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev
* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev:
  ata_piix: add another TECRA M3 entry to broken suspend list
2007-10-02 10:40:20 -07:00
Linus Torvalds
d237098c03 Merge git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched
* git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched:
  sched: fix profile=sleep
2007-10-02 10:38:13 -07:00
Linus Torvalds
114d5b1ca2 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6
* 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6:
  [SPARC64]: Fix missing load-twin usage in Niagara-1 memcpy.
  [SPARC64]: Fix put_user() calls in binfmt_aout32.c
  [SPARC]: Fix EBUS use of uninitialized variable.
2007-10-02 10:35:28 -07:00
Linus Torvalds
2b3b29080d Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
* 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6:
  [IEEE80211]: avoid integer underflow for runt rx frames
  [TCP]: secure_tcp_sequence_number() should not use a too fast clock
  [SFQ]: Remove artificial limitation for queue limit.
2007-10-02 10:34:49 -07:00
Linus Torvalds
e80eaf9904 Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
  [POWERPC] Fix xics set_affinity code
2007-10-02 10:33:49 -07:00
Jeff Garzik
d136552e8b aic94xx: fix DMA data direction for SMP requests
DMA-mapped SMP (scsi management protocol) requests going /to/ the device
need the PCI DMA data direction to indicate such.

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2007-10-02 13:16:10 -04:00
Peter Korsgaard
f662fe5a0b dm9601: Fix receive MTU
dm9601 didn't take the ethernet header into account when calculating
RX MTU, causing packets bigger than 1486 to fail.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-10-02 12:59:10 -04:00
Dale Farnsworth
593ff56ef2 mv643xx_eth: Do not modify struct netdev tx_queue_len
This driver erroneously zeros dev->tx_queue_len, since
mp->tx_ring_size has not yet been initialized.  Actually,
the driver shouldn't modify tx_queue_len at all and should
leave the value set by alloc_etherdev(), currently 1000.

Signed-off-by: Dale Farnsworth <dale@farnsworth.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-10-02 12:55:10 -04:00
Ron Mercer
50626297b1 qla3xxx: bugfix: Fix VLAN rx completion handling.
Fix 4032 chip undocumented "feature" where bit-8 is set
if the inbound completion is for a VLAN.

Signed-off-by: Ron Mercer <ron.mercer@qlogic.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-10-02 12:55:10 -04:00
Ron Mercer
b323e0e49f qla3xxx: bugfix: Add memory barrier before accessing rx completion.
Signed-off-by: Ron Mercer <ron.mercer@qlogic.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-10-02 12:55:10 -04:00
Tejun Heo
4c74d4ec35 ata_piix: add another TECRA M3 entry to broken suspend list
There's a different version of DMI table for TECRA M3 where it has
proper vendor and product name entry.  Add the entry to the broken
suspend list.

Angus Turnbull reported and provided initial patch.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Angus Turnbull <angus@twinhelix.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-10-02 10:54:02 -04:00
Ingo Molnar
30084fbd1c sched: fix profile=sleep
fix sleep profiling - we lost this chunk in the CFS merge.

Found-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-10-02 14:13:08 +02:00
David S. Miller
25e5566ed3 [SPARC64]: Fix missing load-twin usage in Niagara-1 memcpy.
For the case where the source is not aligned modulo 8
we don't use load-twins to suck the data in and this
kills performance since normal loads allocate in the
L1 cache (unlike load-twin) and thus big memcpys swipe
the entire L1 D-cache.

We need to allocate a register window to implement this
properly, but that actually simplifies a lot of things
as a nice side-effect.

Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-02 01:03:09 -07:00
John W. Linville
04045f98e0 [IEEE80211]: avoid integer underflow for runt rx frames
Reported by Chris Evans <scarybeasts@gmail.com>:

> The summary is that an evil 80211 frame can crash out a victim's
> machine. It only applies to drivers using the 80211 wireless code, and
> only then to certain drivers (and even then depends on a card's
> firmware not dropping a dubious packet). I must confess I'm not
> keeping track of Linux wireless support, and the different protocol
> stacks etc.
>
> Details are as follows:
>
> ieee80211_rx() does not explicitly check that "skb->len >= hdrlen".
> There are other skb->len checks, but not enough to prevent a subtle
> off-by-two error if the frame has the IEEE80211_STYPE_QOS_DATA flag
> set.
>
> This leads to integer underflow and crash here:
>
> if (frag != 0)
>    flen -= hdrlen;
>
> (flen is subsequently used as a memcpy length parameter).

How about this?

Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-01 21:03:54 -07:00
Eric Dumazet
9b42c336d0 [TCP]: secure_tcp_sequence_number() should not use a too fast clock
TCP V4 sequence numbers are 32bits, and RFC 793 assumed a 250 KHz clock.
In order to follow network speed increase, we can use a faster clock, but
we should limit this clock so that the delay between two rollovers is
greater than MSL (TCP Maximum Segment Lifetime : 2 minutes)

Choosing a 64 nsec clock should be OK, since the rollovers occur every
274 seconds.

Problem spotted by Denys Fedoryshchenko

[ This bug was introduced by f859581519 ]

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-01 21:01:24 -07:00
Alexey Kuznetsov
32740ddc10 [SFQ]: Remove artificial limitation for queue limit.
This is followup to Patrick's patch. A little optimization to enqueue
routine allows to remove artificial limitation on queue length.

Plus, testing showed that hash function used by SFQ is too bad or even worse.
It does not even sweep the whole range of hash values.
Switched to Jenkins' hash.

Signed-off-by: Alexey Kuznetsov <kaber@ms2.inr.ac.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-01 21:01:23 -07:00
Linus Torvalds
3146b39c18 Linux 2.6.23-rc9
No, I didn't want to do this, but we had more stuff go in after -rc8
than we had in the previous -rc. Gaah.
2007-10-01 20:24:52 -07:00
Linus Torvalds
a3470171d6 Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  [MIPS] vmlinux.lds.S: Handle note sections
  [MIPS] Fix value of O_TRUNC
2007-10-01 20:15:45 -07:00
Andi Kleen
cf8dc57cba x86_64: increase VDSO_TEXT_OFFSET for ancient binutils
For some reason old binutils genertate larger headers so increase the text
offset of the vdso to avoid linker errors.

Roland McGrath explains:
  "There are extra symbols in the '.dynsym' section that are responsible
   for the size difference (They also cause corresponding inflation in
   '.gnu.version')

   Older ld's wrongly generated these unneeded symbols in .dynsym.  This
   was fixed not all that long ago (2006); binutils-2.17.50.0.6 might be
   the first fixed version, but I have not verified for sure where the
   cutoff was.

   The unneeded symbols et al from old ld add almost 700 bytes excess.
   This limits fairly tightly the amount by which the actual text and
   data in the vDSO can grow in the future without pushing the whole
   file over 4kb.  If it does grow later on, we should consider changing
   the layout with a config option or something to pack it better
   without that padding, when building the kernel with newer binutils."

Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Roland McGrath <roland@redhat.com>
Cc: Badari Pulavarty <pbadari@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-01 19:21:30 -07:00
Anton Blanchard
e48395f175 [POWERPC] Fix xics set_affinity code
On a POWER6 machine running 2.6.23-rc8 I sometimes see the following error:

xics_set_affinity: No online cpus in the mask 00000000,00000000,00000000,00000001 for irq 20

In a desperate attempt to get a changelog entry in 2.6.23, I took a look
into it.

It turns out we are passing a real and not a virtual irq into
get_irq_server.  This works for the case where hwirq < NR_IRQS and we
set virq = hwirq.  In my case however hwirq = 590082 and we try and
access irq_desc[590082], slightly past the end at 512 entries.

Lucky we ship lots of memory with our machines.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-10-02 11:48:14 +10:00
Linus Torvalds
7572395767 Fix possible splice() mmap_sem deadlock
Nick Piggin points out that splice isn't being good about the mmap
semaphore: while two readers can nest inside each others, it does leave
a possible deadlock if a writer (ie a new mmap()) comes in during that
nesting.

Original "just move the locking" patch by Nick, replaced by one by me
based on an optimistic pagefault_disable().  And then Jens tested and
updated that patch.

Reported-by: Nick Piggin <npiggin@suse.de>
Tested-by: Jens Axboe <jens.axboe@oracle.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-01 13:17:28 -07:00
Linus Torvalds
e2cd68f7cd Merge branch 'fixes-jgarzik' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6
* 'fixes-jgarzik' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6:
  [PATCH] libertas: build problems when partially modular
2007-10-01 13:11:48 -07:00
Linus Torvalds
f9690f3681 Merge master.kernel.org:/home/rmk/linux-2.6-arm
* master.kernel.org:/home/rmk/linux-2.6-arm:
  [ARM] Resolve PCI section warnings
2007-10-01 13:08:22 -07:00
Linus Torvalds
ca45fe8ea8 Merge branch 'master' of ssh://master.kernel.org/pub/scm/linux/kernel/git/mchehab/v4l-dvb
* 'master' of ssh://master.kernel.org/pub/scm/linux/kernel/git/mchehab/v4l-dvb:
  V4L/DVB (6052): ivtv: fix udma yuv bug
2007-10-01 08:02:57 -07:00
Linus Torvalds
50ef295119 Merge branch 'for-linus' of git://oss.sgi.com:8090/xfs/xfs-2.6
* 'for-linus' of git://oss.sgi.com:8090/xfs/xfs-2.6:
  Revert "[XFS] Avoid replaying inode buffer initialisation log items if ..

[ Fixed it and added some commit messages by hand to that branch   - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-01 08:01:25 -07:00
Tim Shimmin
564256c9e0 Revert "[XFS] Avoid replaying inode buffer initialisation log items if on-disk version is newer."
This reverts commit b394e43e99.

Lachlan McIlroy says:
    It tried to fix an issue where log replay is replaying an inode cluster
    initialisation transaction that should not be replayed because the inode
    cluster on disk is more up to date.  Since we don't log file sizes (we
    rely on inode flushing to get them to disk) then we can't just replay
    all the transations in the log and expect the inode to be completely
    restored.  We lose file size updates.  Unfortunately this fix is causing
    more (serious) problems than it is fixing.

SGI-PV: 969656
SGI-Modid: xfs-linux-melb:xfs-kern:29804a

Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
2007-10-01 07:59:03 -07:00
Martin Schwidefsky
9f96cb1e8b robust futex thread exit race
Calling handle_futex_death in exit_robust_list for the different robust
mutexes of a thread basically frees the mutex.  Another thread might grab
the lock immediately which updates the next pointer of the mutex.
fetch_robust_entry over the next pointer might therefore branch into the
robust mutex list of a different thread.  This can cause two problems: 1)
some mutexes held by the dead thread are not getting freed and 2) some
mutexs held by a different thread are freed.

The next point need to be read before calling handle_futex_death.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-01 07:52:23 -07:00
Samuel Ortiz
8792f961ba VT ioctl race fix
When calling the RELDISP VT ioctl, we are reading vt_newvt while the
console workqueue could be messing with it (through change_console()).  We
fix this race by taking the console semaphore before reading vt_newvt.

Signed-off-by: Samuel Ortiz <sameo@openedhand.com>
Acked-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-01 07:52:23 -07:00
Mark Lord
4047727e5a Fix SMP poweroff hangs
We need to disable all CPUs other than the boot CPU (usually 0) before
attempting to power-off modern SMP machines.  This fixes the
hang-on-poweroff issue on my MythTV SMP box, and also on Thomas Gleixner's
new toybox.

Signed-off-by: Mark Lord <mlord@pobox.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-01 07:52:23 -07:00
Ralf Baechle
281e0e3b34 hugetlb: fix clear_user_highpage arguments
The virtual address space argument of clear_user_highpage is supposed to be
the virtual address where the page being cleared will eventually be mapped.
 This allows architectures with virtually indexed caches a few clever
tricks.  That sort of trick falls over in painful ways if the virtual
address argument is wrong.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-01 07:52:23 -07:00
Dave Jones
8814842fbb Add /dev/oldmem to devices.txt documentation
Signed-off-by: Dave Jones <davej@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: <device@lanana.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-01 07:52:23 -07:00
Maciej W. Rozycki
6f6b3940ed [MIPS] vmlinux.lds.S: Handle note sections
Store any note sections after the exception tables like the other
architectures do.  This is required for .note.gnu.build-id emitted from
binutils 2.18 onwards if nothing else.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-01 14:17:50 +01:00
Ralf Baechle
ca074a3392 [MIPS] Fix value of O_TRUNC
A "cleanup" almost two years ago deleted the old definition from
<asm/fcntl.h>, so asm-generic/fcntl.h defaulted it to the the same
value as FASYNC ...   which happened to be the wrong thing.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-01 14:17:50 +01:00
Randy Dunlap
f998351c75 [PATCH] libertas: build problems when partially modular
Fix missing symbols in libertas USB driver when it is modular and rest
of libertas is built-in.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2007-09-30 20:35:39 -04:00
David S. Miller
8cc8c28a9a [SPARC64]: Fix put_user() calls in binfmt_aout32.c
argv and envp are pointers to u32's in userspace, so don't
try to put_user() a NULL to them.

Aparently gcc-4.2.x now warns about this, and since we use
-Werror for arch/sparc64 code, this breaks the build.

Signed-off-by: David S. Miller <davem@davemloft.net>
2007-09-30 17:00:34 -07:00
Russell King
46edfc54ee [ARM] Resolve PCI section warnings
Fix the following (valid) section warnings:

WARNING: vmlinux.o(.text+0xf7b5c): Section mismatch: reference to .init.text:pcibios_fixup_bus (between 'pci_scan_child_bus' and 'pci_scan_bridge')
WARNING: vmlinux.o(.text+0xfc5f4): Section mismatch: reference to .init.text:pcibios_resource_to_bus (between 'pci_map_rom' and 'pci_unmap_rom')
WARNING: vmlinux.o(.text+0xfc824): Section mismatch: reference to .init.text:pcibios_resource_to_bus (between 'pci_update_resource' and 'pci_claim_resource')
WARNING: vmlinux.o(.text+0xfd6d8): Section mismatch: reference to .init.text:pcibios_resource_to_bus (between 'pci_setup_cardbus' and 'find_free_bus_resource')
WARNING: vmlinux.o(.text+0xfd730): Section mismatch: reference to .init.text:pcibios_resource_to_bus (between 'pci_setup_cardbus' and 'find_free_bus_resource')
WARNING: vmlinux.o(.text+0xfd788): Section mismatch: reference to .init.text:pcibios_resource_to_bus (between 'pci_setup_cardbus' and 'find_free_bus_resource')
WARNING: vmlinux.o(.text+0xfd7e0): Section mismatch: reference to .init.text:pcibios_resource_to_bus (between 'pci_setup_cardbus' and 'find_free_bus_resource')
WARNING: vmlinux.o(.text+0xfe024): Section mismatch: reference to .init.text:pcibios_resource_to_bus (between 'pci_bus_assign_resources' and 'sys_pciconfig_read')
WARNING: vmlinux.o(.text+0xfe0f4): Section mismatch: reference to .init.text:pcibios_resource_to_bus (between 'pci_bus_assign_resources' and 'sys_pciconfig_read')
WARNING: vmlinux.o(.text+0xfe17c): Section mismatch: reference to .init.text:pcibios_resource_to_bus (between 'pci_bus_assign_resources' and 'sys_pciconfig_read')

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-09-30 17:36:22 +01:00
Ian Armstrong
cb50f548c0 V4L/DVB (6052): ivtv: fix udma yuv bug
Using udma yuv causes the driver becomes locked into that mode. This prevents
use of the mpeg decoder & non-udma yuv output. This patch clears the
operating mode when the device is closed.

Signed-off-by: Ian Armstrong <ian@iarmst.demon.co.uk>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2007-09-30 10:31:34 -03:00
Jan Lübbe
a64314e62d fix console change race exposed by CFS
The new behaviour of CFS exposes a race which occurs if a switch is
requested when vt_mode.mode is VT_PROCESS.

The process with vc->vt_pid is signaled before vc->vt_newvt is set.
This causes the switch to fail when triggered by the monitoing process
because the target is still -1.

[ If the signal sending fails, the subsequent "reset_vc(vc)" will then
  reset vt_newvt to -1, so this works for that case too.   - Linus ]

Signed-off-by: Jan Lübbe <jluebbe@lasnet.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-09-29 10:00:15 -07:00
Linus Torvalds
ed7fdff5d6 Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6
* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6:
  mv643xx_eth: Check ETH_INT_CAUSE_STATE bit
2007-09-29 09:25:55 -07:00
Nick Piggin
4827bbb06e i386: remove bogus comment about memory barrier
The comment being removed by this patch is incorrect and misleading.

In the following situation:

	1. load  ...
	2. store 1 -> X
	3. wmb
	4. rmb
	5. load  a <- Y
	6. store ...

4 will only ensure ordering of 1 with 5.
3 will only ensure ordering of 2 with 6.

Further, a CPU with strictly in-order stores will still only provide that
2 and 6 are ordered (effectively, it is the same as a weakly ordered CPU
with wmb after every store).

In all cases, 5 may still be executed before 2 is visible to other CPUs!

The additional piece of the puzzle that mb() provides is the store/load
ordering, which fundamentally cannot be achieved with any combination of
rmb()s and wmb()s.

This can be an unexpected result if one expected any sort of global ordering
guarantee to barriers (eg. that the barriers themselves are sequentially
consistent with other types of barriers).  However sfence or lfence barriers
need only provide an ordering partial ordering of memory operations -- Consider
that wmb may be implemented as nothing more than inserting a special barrier
entry in the store queue, or, in the case of x86, it can be a noop as the store
queue is in order. And an rmb may be implemented as a directive to prevent
subsequent loads only so long as their are no previous outstanding loads (while
there could be stores still in store queues).

I can actually see the occasional load/store being reordered around lfence on
my core2. That doesn't prove my above assertions, but it does show the comment
is wrong (unless my program is -- can send it out by request).

So:
   mb() and smp_mb() always have and always will require a full mfence
   or lock prefixed instruction on x86.  And we should remove this comment.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Paul McKenney <paulmck@us.ibm.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-09-29 09:13:59 -07:00
Dale Farnsworth
2bcff60f7c mv643xx_eth: Check ETH_INT_CAUSE_STATE bit
Commit 468d09f894 masked the "state"
interrupt (bit 20 of the cause register). This results in Radstone's
PPC7D repeatedly re-entering the interrupt routine, locking up the
board. The following patch returns the required handling for this
interrupt.

Signed-off-by: Martyn Welch <martyn.welch@radstone.co.uk>
Signed-off-by: Dale Farnsworth <dale@farnsworth.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-09-29 00:46:30 -04:00
Benjamin Herrenschmidt
1bef7dc00c Fix bogus PCI quirk for e100
Linas reported me that some machines were crashing at boot in
quirk_e100_interrupt. It appears that this quirk is doing an ioremap
directly on a PCI BAR value, which isn't legal and will cause all sorts
of bad things to happen on architectures where PCI BARs don't directly
match processor bus addresses.

This fixes it by using the proper PCI resources instead which is possible
since the quirk has been moved by a previous commit to happen late enough
for that.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Linas Vepstas <linas@austin.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-09-28 16:21:10 -07:00
Linus Torvalds
05e31754d1 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
* 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6:
  [TCP]: Fix MD5 signature handling on big-endian.
  [NET]: Zero length write() on socket should not simply return 0.
2007-09-28 15:44:44 -07:00