Commit graph

22859 commits

Author SHA1 Message Date
Stephen Rothwell
09e67ca2c5 [POWERPC] Move of_device_get_modalias to drivers/of
Commit 140b932f8c ("Create modalias file
in sysfs for of_platform bus") needs this to avoid breaking the sparc
builds.

Just move the code and add whitespace around some binary operators.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-05-16 23:22:28 +10:00
Robert P. J. Day
7bc228b1ef [POWERPC] Get most of ioctl.h content from <asm-generic/ioctl.h>
Now that <asm-generic/ioctl.h> allows overriding of the most commonly
changed macros, take advantage of that.

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-05-16 23:22:28 +10:00
Scott Wood
0b2cca804e [POWERPC] Add 6xx-style HID0_SLEEP support.
This adds a function to put a 6xx/7xx/7xxx/83xx family CPU into sleep
mode, and return after an interrupt has occurred.  It expects to be
called with interrupts disabled, and returns with interrupts disabled.
Interrupts are enabled while the processor is asleep, but the interrupt
that wakes the processor is not handled; it is still pending when this
function returns.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-05-16 23:22:28 +10:00
Paul Mackerras
a560643e21 [POWERPC] Defer processing of interrupts when the CPU wakes from sleep mode
This provides a way to defer processing of an interrupt that wakes the
processor out of sleep mode.  On 32-bit platforms that use an
interrupt to wake the processor, we have to have interrupts enabled in
hardware at the point where we go to sleep, otherwise the processor
will never wake up.  However, because interrupts are logically
disabled at this point, we don't want to process the interrupt
straight away.

This is handled by setting the _TLF_SLEEPING flag.  When we get an
interrupt and _TLF_SLEEPING is set, we firstly clear the MSR_EE
(external interrupt enable) bit in the saved MSR value, and secondly
we then return to the address in the link register, like we do for
_TLF_NAPPING, but without actually handling the interrupt.

Note that this is handled somewhat differently on powerbooks, so this
new code will only be used on non-Apple machines.

Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-05-16 23:22:28 +10:00
Paul Mackerras
fcff474ea5 Merge branch 'linux-2.6' into powerpc-next 2008-05-16 23:13:42 +10:00
Linus Torvalds
f26a398891 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] macintosh: Replace deprecated __initcall with device_initcall
  [POWERPC] cell: Fix section mismatches in io-workarounds code
  [POWERPC] spufs: Fix compile error
  [POWERPC] Fix uninitialized variable bug in copy_{to|from}_user
  [POWERPC] Add null pointer check to of_find_property
  [POWERPC] vmemmap fixes to use smaller pages
  [POWERPC] spufs: Fix pointer reference in find_victim
  [POWERPC] 85xx: SBC8548 - Add flash support and HW Rev reporting
  [POWERPC] 85xx: Fix some sparse warnings for 85xx MDS
  [POWERPC] 83xx: Enable DMA engine on the MPC8377 MDS board.
  [POWERPC] 86xx: mpc8610_hpcd: fix second serial port
  [POWERPC] 86xx: mpc8610_hpcd: add support for NOR and NAND flashes
  [POWERPC] 85xx: Add 8568 PHY workarounds to board code
  [POWERPC] 86xx: mpc8610_hpcd: use ULI526X driver for on-board ethernet
2008-05-15 18:28:46 -07:00
Linus Torvalds
a442ac512f Clean up 'print_fn_descriptor_symbol()' types
Everybody wants to pass it a function pointer, and in fact, that is what
you _must_ pass it for it to make sense (since it knows that ia64 and
ppc64 use descriptors for function pointers and fetches the actual
address from there).

So don't make the argument be a 'unsigned long' and force everybody to
add a cast.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-05-15 17:50:37 -07:00
Linus Torvalds
7371fd11a6 Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
  [IA64] fix personality(PER_LINUX32) performance issue
  [IA64] Properly unregister legacy interrupts
  [IA64] Remove NULL pointer check for argument never passed as NULL.
  [IA64] trivial cleanup for perfmon.c
  [IA64] trivial cleanup for entry.S
  [IA64] fix interrupt masking for pending works on kernel leave
  [IA64] allow user to force_pal_cache_flush
  [IA64] Don't reserve crashkernel memory > 4 GB
  [IA64] machvec support for SGI UV platform
  [IA64] Add header files for SGI UV platform
2008-05-15 13:56:42 -07:00
Linus Torvalds
8568dae21e Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6
* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6:
  [S390] show_interrupts: prevent cpu hotplug when walking cpu_online_map.
  [S390] smp: __smp_call_function_map vs cpu_online_map fix.
  [S390] tape: Use ccw_dev_id to build cdev_id.
  [S390] dasd: fix timeout handling in interrupt handler
  [S390] s390dbf: Use const char * for dbf name.
  [S390] dasd: Use const in busid functions.
  [S390] blacklist.c: removed duplicated include
  [S390] vmlogrdr: module initialization function should return negative errors
  [S390] sparsemem vmemmap: initialize memmap.
  [S390] Remove last traces of cio_msg=.
  [S390] cio: Remove CCW_CMD_SUSPEND_RECONN in front of CCW_CMD_SET_PGID.
2008-05-15 09:10:13 -07:00
Linus Torvalds
713c0515a5 Merge git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6:
  arch/parisc/kernel/perf_asm.S: build fix
  parisc: remove -traditional from assembler flags
  parisc: use conditional macro for 64-bit wide ops
  parisc: Remove ioctl.h content picked up from <asm-generic/ioctl.h>.
  arch/parisc/kernel/unaligned.c: use time_* macros
  parisc: remove redundant display of free swap space in show_mem()
  drivers/parisc: replace remaining __FUNCTION__ occurrences
  parisc: replace remaining __FUNCTION__ occurrences
  parisc: new termios definitions
  parisc: fix trivial section name warnings
2008-05-15 09:09:43 -07:00
Kyle McMartin
872f6debca parisc: use conditional macro for 64-bit wide ops
This work enables us to remove -traditional from $AFLAGS on
parisc.

Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
2008-05-15 11:03:43 -04:00
Robert P. J. Day
f54d8a1b3f parisc: Remove ioctl.h content picked up from <asm-generic/ioctl.h>.
Now that <asm-generic/ioctl.h> allows overriding of the most commonly
changed macro values, take advantage of that.

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
2008-05-15 11:03:34 -04:00
Cornelia Huck
5cbbf16a0f [S390] s390dbf: Use const char * for dbf name.
We should use const char * for passing the name of the debug feature
around since it will not be changed.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-05-15 16:52:39 +02:00
Alan Cox
9e491e54f0 parisc: new termios definitions
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Grant Grundler <grundler@parisc-linux.org>
Cc: Matthew Wilcox <willy@debian.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
2008-05-15 10:38:54 -04:00
Nate Case
9c8387afdc [POWERPC] Fix uninitialized variable bug in copy_{to|from}_user
Calls to copy_to_user() or copy_from_user() can fail when copying N
bytes, where N is a constant less than 8, but not 1, 2, 4, or 8,
because 'ret' is not initialized and is only set if the size is 1,
2, 4 or 8, but is tested after the switch statement for any constant
size <= 8.  This fixes it by initializing 'ret' to 1, causing the
code to fall through to the __copy_tofrom_user call for sizes other
than 1, 2, 4 or 8.

Signed-off-by: Dave Scidmore <dscidmore@xes-inc.com>
Signed-off-by: Nate Case <ncase@xes-inc.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-05-15 20:49:52 +10:00
Benjamin Herrenschmidt
cec08e7a94 [POWERPC] vmemmap fixes to use smaller pages
This changes vmemmap to use a different region (region 0xf) of the
address space, and to configure the page size of that region
dynamically at boot.

The problem with the current approach of always using 16M pages is that
it's not well suited to machines that have small amounts of memory such
as small partitions on pseries, or PS3's.

In fact, on the PS3, failure to allocate the 16M page backing vmmemmap
tends to prevent hotplugging the HV's "additional" memory, thus limiting
the available memory even more, from my experience down to something
like 80M total, which makes it really not very useable.

The logic used by my match to choose the vmemmap page size is:

 - If 16M pages are available and there's 1G or more RAM at boot,
   use that size.
 - Else if 64K pages are available, use that
 - Else use 4K pages

I've tested on a POWER6 (16M pages) and on an iSeries POWER3 (4K pages)
and it seems to work fine.

Note that I intend to change the way we organize the kernel regions &
SLBs so the actual region will change from 0xf back to something else at
one point, as I simplify the SLB miss handler, but that will be for a
later patch.

Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-05-15 20:49:25 +10:00
Linus Torvalds
8f40f672e6 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs
* 'for-linus' of ssh://master.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
  9p: fix error path during early mount
  9p: make cryptic unknown error from server less scary
  9p: fix flags length in net
  9p: Correct fidpool creation failure in p9_client_create
  9p: use struct mutex instead of struct semaphore
  9p: propagate parse_option changes to client and transports
  fs/9p/v9fs.c (v9fs_parse_options): Handle kstrdup and match_strdup failure.
  9p: Documentation updates
  add match_strlcpy() us it to make v9fs make uname and remotename parsing more robust
2008-05-14 19:30:51 -07:00
Linus Torvalds
8978a31883 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  sparc64: Use a TS_RESTORE_SIGMASK
  lmb: Make lmb debugging more useful.
  lmb: Fix inconsistent alignment of size argument.
  sparc: Fix mremap address range validation.
2008-05-14 19:11:36 -07:00
Venki Pallipadi
1c12c4cf94 mprotect: prevent alteration of the PAT bits
There is a defect in mprotect, which lets the user change the page cache
type bits by-passing the kernel reserve_memtype and free_memtype
wrappers.  Fix the problem by not letting mprotect change the PAT bits.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-05-14 19:11:15 -07:00
Eric Dumazet
44c81433e8 per_cpu: fix DEFINE_PER_CPU_SHARED_ALIGNED for modules
Current module loader lookups ".data.percpu" ELF section to perform
per_cpu relocation.  But DEFINE_PER_CPU_SHARED_ALIGNED() uses another
section (".data.percpu.shared_aligned"), currently only handled in
vmlinux.lds, not by module loader.

To correct this problem, instead of adding logic into module loader, or
using at build time a module.lds file for all arches to group
".data.percpu.shared_aligned" into ".data.percpu", just use ".data.percpu"
for modules.

Alignment requirements are correctly handled by ld and module loader.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-05-14 19:11:14 -07:00
Harvey Harrison
3fc957721d lib: create common ascii hex array
Add a common hex array in hexdump.c so everyone can use it.

Add a common hi/lo helper to avoid the shifting masking that is
done to get the upper and lower nibbles of a byte value.

Pull the pack_hex_byte helper from kgdb as it is opencoded many
places in the tree that will be consolidated.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-05-14 19:11:14 -07:00
Mike Frysinger
b7cffc1f29 asm-{alpha,h8300,um,v850,xtensa}/param.h: unbreak HZ for userspace
I noticed this because alpha was broken due to the recent commit commit
bdc807871d ("avoid overflows in
kernel/time.c").  Most arches do something like this in their
asm/param.h:

#ifdef __KERNEL__
# define HZ CONFIG_HZ
#else
# define HZ 100
#endif

A few arches though (namely alpha/h8300/um/v850/xtensa) either do no set
HZ at all for !__KERNEL__, or they set it wrongly.  This should bring all
arches in line by setting up HZ for userspace.

Without this currently perl 5.10 doesn't build on alpha:

perl.c: In function 'perl_construct':
perl.c:388: error: 'CONFIG_HZ' undeclared (first use in this function)
-> http://buildd.debian.org/fetch.cgi?pkg=perl;ver=5.10.0-10;arch=alpha;stamp=1210252894

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: maximilian attems <max@stro.at>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
[ HZ on alpha is 1024 for historical reasons.  - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-05-14 19:11:14 -07:00
Eric Van Hensbergen
887b3ece65 9p: fix error path during early mount
There was some cleanup issues during early mount which would trigger
a kernel bug for certain types of failure.  This patch reorganizes the
cleanup to get rid of the bad behavior.

This also merges the 9pnet and 9pnet_fd modules for the purpose of
configuration and initialization.  Keeping the fd transport separate
from the core 9pnet code seemed like a good idea at the time, but in
practice has caused more harm and confusion than good.

Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
2008-05-14 19:23:27 -05:00
Eric Van Hensbergen
ee443996a3 9p: Documentation updates
The kernel-doc comments of much of the 9p system have been in disarray since
reorganization.  This patch fixes those problems, adds additional documentation
and a template book which collects the 9p information.

Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
2008-05-14 19:23:25 -05:00
Markus Armbruster
b32a09db4f add match_strlcpy() us it to make v9fs make uname and remotename parsing more robust
match_strcpy() is a somewhat creepy function: the caller needs to make sure
that the destination buffer is big enough, and when he screws up or
forgets, match_strcpy() happily overruns the buffer.

There's exactly one customer: v9fs_parse_options().  I believe it currently
can't overflow its buffer, but that's not exactly obvious.

The source string is a substing of the mount options.  The kernel silently
truncates those to PAGE_SIZE bytes, including the terminating zero.  See
compat_sys_mount() and do_mount().

The destination buffer is obtained from __getname(), which allocates from
name_cachep, which is initialized by vfs_caches_init() for size PATH_MAX.

We're safe as long as PATH_MAX <= PAGE_SIZE.  PATH_MAX is 4096.  As far as
I know, the smallest PAGE_SIZE is also 4096.

Here's a patch that makes the code a bit more obviously correct.  It
doesn't depend on PATH_MAX <= PAGE_SIZE.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Cc: Latchesar Ionkov <lucho@ionkov.net>
Cc: Jim Meyering <meyering@redhat.com>
Cc: "Randy.Dunlap" <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
2008-05-14 19:23:25 -05:00
Jack Steiner
2224661494 [IA64] machvec support for SGI UV platform
This patch adds the basic IA64 machvec infrastructure to support
the SGI "UV" platform.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-05-14 14:22:04 -07:00
Jack Steiner
7868f1ed84 [IA64] Add header files for SGI UV platform
Add new UV-specific header files.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-05-14 14:20:25 -07:00
Bartlomiej Zolnierkiewicz
cafa027b8c cs5520: disable VDMA
Disable Virtual DMA support for now (it causes system hangs).

Thanks to TAKADA Yoshihito for the help with debugging the problem.

Reported-by: TAKADA Yoshihito <takada@mbf.nifty.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2008-05-14 23:06:16 +02:00
Adrian Bunk
e0b4eb5193 make ide-iops.c:SELECT_MASK() static
SELECT_MASK() can now become static.

[bart: remove space between function name and open parenthesis]

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2008-05-14 23:06:15 +02:00
Linus Torvalds
fc99824c42 Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-2.6:
  Driver core: struct class remove children list
  block: do_mounts - accept root=<non-existant partition>
2008-05-14 11:13:44 -07:00
Linus Torvalds
e90a4e475a Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (22 commits)
  USB: atmel_usba_udc fixes, mostly disconnect()
  USB: pxa27x_udc: minor fixes
  usbtest: comment on why this code "expects" negative and positive errnos
  USB: remove PICDEM FS USB demo (04d8:000c) device from ldusb
  USB: option: add new Dell 5520 HSDPA variant
  USB: unusual_devs: Add support for GI 0401 SD-Card interface
  USB: serial gadget: descriptor cleanup
  USB: serial gadget: simplify endpoint handling
  USB: serial gadget: remove needless data structure
  USB: serial gadget: cleanup/reorg
  usb: fix compile warning in isp1760
  USB: do not handle device 1410:5010 in 'option' driver
  USB: Fix unusual_devs.h ordering
  USB: add Zoom Telephonics Model 3095F V.92 USB Mini External modem to cdc-acm
  USB: Support for the ET502HS HDSPA modem in option driver
  USB: Support for the ET502HS HDSPA modem
  usb: fix integer as NULL pointer warnings found by sparse
  USB: isp1760: fix printk format
  USB: add Telstra NextG CDMA id to option driver
  USB: add association.h
  ...
2008-05-14 10:52:40 -07:00
Dave Young
0a3ad00ca0 Driver core: struct class remove children list
because of the class_device was removed, now do the children list removing

Signed-off-by: Dave Young <hidave.darkstar@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-05-14 10:37:58 -07:00
Kay Sievers
30f2f0eb4b block: do_mounts - accept root=<non-existant partition>
Some devices, like md, may create partitions only at first access,
so allow root= to be set to a valid non-existant partition of an
existing disk. This applies only to non-initramfs root mounting.

This fixes a regression from 2.6.24 which did allow this to happen and
broke some users machines :(

Acked-by: Neil Brown <neilb@suse.de>
Tested-by: Joao Luis Meloni Assirati <assirati@nonada.if.usp.br>
Cc: stable <stable@kernel.org>
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-05-14 10:37:57 -07:00
Linus Torvalds
6aa5fc4349 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (73 commits)
  net: Fix typo in net/core/sock.c.
  ppp: Do not free not yet unregistered net device.
  netfilter: xt_iprange: module aliases for xt_iprange
  netfilter: ctnetlink: dump conntrack ID in event messages
  irda: Fix a misalign access issue. (v2)
  sctp: Fix use of uninitialized pointer
  cipso: Relax too much careful cipso hash function.
  tcp FRTO: work-around inorder receivers
  tcp FRTO: Fix fallback to conventional recovery
  New maintainer for Intel ethernet adapters
  DM9000: Use delayed work to update MII PHY state
  DM9000: Update and fix driver debugging messages
  DM9000: Add __devinit and __devexit attributes to probe and remove
  sky2: fix simple define thinko
  [netdrvr] sfc: sfc: Add self-test support
  [netdrvr] sfc: Increment rx_reset when reported as driver event
  [netdrvr] sfc: Remove unused macro EFX_XAUI_RETRAIN_MAX
  [netdrvr] sfc: Fix code formatting
  [netdrvr] sfc: Remove kernel-doc comments for removed members of struct efx_nic
  [netdrvr] sfc: Remove garbage from comment
  ...
2008-05-14 10:08:24 -07:00
Nick Piggin
362a61ad61 fix SMP data race in pagetable setup vs walking
There is a possible data race in the page table walking code. After the split
ptlock patches, it actually seems to have been introduced to the core code, but
even before that I think it would have impacted some architectures (powerpc
and sparc64, at least, walk the page tables without taking locks eg. see
find_linux_pte()).

The race is as follows:
The pte page is allocated, zeroed, and its struct page gets its spinlock
initialized. The mm-wide ptl is then taken, and then the pte page is inserted
into the pagetables.

At this point, the spinlock is not guaranteed to have ordered the previous
stores to initialize the pte page with the subsequent store to put it in the
page tables. So another Linux page table walker might be walking down (without
any locks, because we have split-leaf-ptls), and find that new pte we've
inserted. It might try to take the spinlock before the store from the other
CPU initializes it. And subsequently it might read a pte_t out before stores
from the other CPU have cleared the memory.

There are also similar races in higher levels of the page tables. They
obviously don't involve the spinlock, but could see uninitialized memory.

Arch code and hardware pagetable walkers that walk the pagetables without
locks could see similar uninitialized memory problems, regardless of whether
split ptes are enabled or not.

I prefer to put the barriers in core code, because that's where the higher
level logic happens, but the page table accessors are per-arch, and open-coding
them everywhere I don't think is an option. I'll put the read-side barriers
in alpha arch code for now (other architectures perform data-dependent loads
in order).

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-05-14 10:05:18 -07:00
Nick Piggin
73f10281ea read_barrier_depends arch fixlets
read_barrie_depends has always been a noop (not a compiler barrier) on all
architectures except SMP alpha. This brings UP alpha and frv into line with all
other architectures, and fixes incorrect documentation.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-05-14 10:05:18 -07:00
Greg Kroah-Hartman
d23039eec7 USB: add association.h
This will be used by the wireless usb code, as well as potentially other
USB code.

Originally based on some .c code written by Inaky Perez-Gonzalez
<inaky.perez-gonzalez@intel.com>

Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-05-14 10:00:26 -07:00
Michael Ellerman
1c21a2937b [POWERPC] Fix sparse warnings in arch/powerpc/kernel
Make a few things static in lparcfg.c
Make init and exit routines static in rtas_flash.c
Make things static in rtas_pci.c
Make some functions static in rtas.c
Make fops static in rtas-proc.c
Remove unneeded extern for do_gtod in smp.c
Make clocksource_init() static in time.c
Make last_tick_len and ticklen_to_xs static in time.c
Move the declaration of the pvr per-cpu into smp.h
Make kexec_smp_down() and kexec_stack static in machine_kexec_64.c
Don't return void in arch_teardown_msi_irqs() in msi.c
Move declaration of GregorianDay()into asm/time.h

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-05-14 22:31:59 +10:00
Michael Ellerman
1c8950ff87 [POWERPC] Make cpus_in_xmon static and remove extern mess from hvc_console.c
This is a little messier than I'd like because xmon.h only exists
on powerpc and we can't have a static inline and an extern declaration
visible at the same time.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-05-14 22:31:57 +10:00
Michael Ellerman
af3b74df1b [POWERPC] Move xmon_irq() declaration into xmon.h
The typdef for irqreturn_t was moved into its own header a
while back, so there's no reason we can't move xmon_irq()
into xmon.h now.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-05-14 22:31:54 +10:00
Michael Ellerman
7d9e793463 [POWERPC] Add a declaration for xmon()
Usually we call xmon() via debugger(), so this could be static.
Sometimes when debugging it's nice to be able to call xmon()
directly though, so add a declaration.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-05-14 22:31:52 +10:00
Michael Ellerman
572fb578de [POWERPC] Move declaration of tce variables into mmu-hash64.h
... instead of having extern declarations in a .c file.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-05-14 22:31:47 +10:00
Michael Ellerman
5f25f06529 [POWERPC] Move declaration of init_bootmem_done into system.h
... instead of having an extern declaration in a .c file.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-05-14 22:31:44 +10:00
Kumar Gala
663276b7c6 [POWERPC] Set lower flag bits in regs->trap to indicate debug level exception
We use the low bits of regs->trap as flag bits.  We already indicate
critical and machine check level exceptions via this mechanism.  Extend it
to indicate debug level exceptions.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-05-14 22:31:37 +10:00
Roland McGrath
7a10174eea [POWERPC] Define and use TLF_RESTORE_SIGMASK
Replace TIF_RESTORE_SIGMASK with TLF_RESTORE_SIGMASK and define
our own set_restore_sigmask() function.  This saves the costly
SMP-safe set_bit operation, which we do not need for the sigmask
flag since TIF_SIGPENDING always has to be set too.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-05-14 22:31:33 +10:00
Graf Yang
332223831e irda: Fix a misalign access issue. (v2)
Replace u16ho with put/get_unaligned functions

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-05-13 23:25:57 -07:00
Linus Torvalds
5dc93cf457 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
  [ALSA] ASoC: Fix wrong enum count for jack_function in N810 machine driver
  [ALSA] ASoC: build fix for snd_soc_info_bool_ext
  [ALSA] ASoC: Fix TLV320AIC3X mono line output interconnect
  [ALSA] soc - fsl_ssi.c fix "BUG: scheduling while atomic"
  [ALSA] emux midi synthesizer doesn't honor SOFT_PEDAL-release event
2008-05-13 09:49:06 -07:00
Miklos Szeredi
78bb6cb9a8 fuse: add flag to turn on big writes
Prior to 2.6.26 fuse only supported single page write requests.  In theory all
fuse filesystem should be able support bigger than 4k writes, as there's
nothing in the API to prevent it.  Unfortunately there's a known case in
NTFS-3G where big writes cause filesystem corruption.  There could also be
other filesystems, where the lack of testing with big write requests would
result in bugs.

To prevent such problems on a kernel upgrade, disable big writes by default,
but let filesystems set a flag to turn it on.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Cc: Szabolcs Szakacsits <szaka@ntfs-3g.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-05-13 08:02:26 -07:00
KOSAKI Motohiro
4cd1a8fc3d memcg: fix possible panic when CONFIG_MM_OWNER=y
When mm destruction happens, we should pass mm_update_next_owner() the old mm.
 But unfortunately new mm is passed in exec_mmap().

Thus, kernel panic is possible when a multi-threaded process uses exec().

Also, the owner member comment description is wrong.  mm->owner does not
necessarily point to the thread group leader.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: "Paul Menage" <menage@google.com>
Cc: "KAMEZAWA Hiroyuki" <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-05-13 08:02:25 -07:00
Paul Jackson
f4ed0deae8 cpumask: remove bitmap_scnprintf_len and cpumask_scnprintf_len
They aren't used.  They were briefly used as part of some other patches to
provide an alternative format for displaying some /proc and /sys cpumasks.
They probably should have been removed when those other patches were dropped,
in favor of a different solution.

Signed-off-by: Paul Jackson <pj@sgi.com>
Cc: "Mike Travis" <travis@sgi.com>
Cc: "Bert Wesarg" <bert.wesarg@googlemail.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: WANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-05-13 08:02:25 -07:00