The attached patch optimises d_find_alias() to only take the spinlock if
there's anything in the the inode's alias list. If there isn't, it returns
NULL immediately.
With respect to the superblock sharing patch, this should reduce by one the
number of times the dcache_lock is taken by nfs_lookup() for ordinary
directory lookups.
Only in the case where there's already a dentry for particular directory inode
(such as might happen when another mountpoint is rooted at that dentry) will
the lock then be taken the extra time.
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
According to the specification the timevals must be validated and an
errorcode -EINVAL returned in case the timevals are not in canonical form.
This check was never done in Linux.
The pre 2.6.16 code converted invalid timevals silently. Negative timeouts
were converted by the timeval_to_jiffies conversion to the maximum timeout.
hrtimers and the ktime_t operations expect timevals in canonical form.
Otherwise random results might happen on 32 bits machines due to the
optimized ktime_add/sub operations. Negative timeouts are treated as
already expired. This might break applications which work on pre 2.6.16.
To prevent random behaviour and API breakage the timevals are checked and
invalid timevals sanitized in a simliar way as the pre 2.6.16 code did.
Invalid timevals are reported with a per boot limited number of kernel
messages so applications which use this misfeature can be corrected.
After a grace period of one year the sanitizing should be replaced by a
correct validation check. This is also documented in
Documentation/feature-removal-schedule.txt
The validation and sanitizing is done inside do_setitimer so all callers
(sys_setitimer, compat_sys_setitimer, osf_setitimer) are catched.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
alarm() calls the kernel with an unsigend int timeout in seconds. The
value is stored in the tv_sec field of a struct timeval to setup the
itimer. The tv_sec field of struct timeval is of type long, which causes
the tv_sec value to be negative on 32 bit machines if seconds > INT_MAX.
Before the hrtimer merge (pre 2.6.16) such a negative value was converted
to the maximum jiffies timeout by the timeval_to_jiffies conversion. It's
not clear whether this was intended or just happened to be done by the
timeval_to_jiffies code.
hrtimers expect a timeval in canonical form and treat a negative timeout as
already expired. This breaks the legitimate usage of alarm() with a
timeout value > INT_MAX seconds.
For 32 bit machines it is therefor necessary to limit the internal seconds
value to avoid API breakage. Instead of doing this in all implementations
of sys_alarm the duplicated sys_alarm code is moved into a common function
in itimer.c
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
I seem to have lost this hunk in yesterday's patch. It brings the
coming-online CPU's softlockup timer up to date so we don't get false-positive
tripups during CPU hot-add.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Attached patch fixes invalid pointer arithmetic in DMI code to make onboard
device discovery working again.
akpm: bug has been present since dmi_find_device() was added in 2.6.14.
Affects ipmi only (I think) - the symptoms weren't described.
akpm: changed to use pointer arithmetic rather than open-coded sizeof.
Signed-off-by: Andrey Panin <pazke@donpac.ru>
Cc: Corey Minyard <minyard@acm.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
net: ne2k.c won't compile if pci_clone_list is const
f71e130966 which (amongst other things)
made pci_clone_list in ne2k-pci.c const causes the following compile error.
This patch reverses that portion of that changeset
drivers/net/ne2k-pci.c:123: error: pci_clone_list causes a section type
conflict
~/ gcc --version
gcc (GCC) 4.0.3 (Debian 4.0.3-1)
~/ dpkg gcc-4.0 | grep Version
Version: 4.0.3-1
Signed-Off-By: Horms <horms@verge.net.au
ne2k-pci.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
cee0890cc97247b6a9decd94f5dc0719ac8f0b1b
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This patch adds support for the Ethernet controller integrated in the
Atmel AT91RM9200 SoC processor.
Changes since the previous submission (01/02/2006) are:
- Make use of the clk.h clock infrastructure.
- The multicast hash function is not crc32. [Patch by Pedro Perez]
Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev:
[PATCH] libata: Remove dependence on host_set->dev for SAS
[PATCH] libata: ata_scsi_ioctl cleanup
[PATCH] libata: ata_scsi_queuecmd cleanup
[libata] export ata_dev_pair; trim trailing whitespace
[PATCH] libata: add ata_dev_pair helper
[PATCH] Make libata not powerdown drivers on PM_EVENT_FREEZE.
[PATCH] libata: make ata_set_mode() responsible for failure handling
[PATCH] libata: use ata_dev_disable() in ata_bus_probe()
[PATCH] libata: implement ata_dev_disable()
[PATCH] libata: check if port is disabled after internal command
[PATCH] libata: make per-dev transfer mode limits per-dev
[PATCH] libata: add per-dev pio/mwdma/udma_mask
[PATCH] libata: implement ata_unpack_xfermask()
[libata] Move some bmdma-specific code to libata-bmdma.c
[libata sata_uli] kill scr_addr abuse
[libata sata_nv] eliminate duplicate codepaths with iomap
[libata sata_nv] cleanups: convert #defines to enums; remove in-file history
[libata sata_sil24] cleanups: use pci_iomap(), kzalloc()
uevent_seqnum and uevent_helper are only defined if CONFIG_HOTPLUG=y,
CONFIG_NET=n.
(I stole this back from Greg's tree - it makes allnoconfig work).
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Copies user-space string with strndup_user() and moves the type string
duplication code to a function (thus fixing a wrong check on the length of the
type.)
Signed-off-by: Davi Arnaut <davi.arnaut@gmail.com>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This patch series creates a strndup_user() function to easy copying C strings
from userspace. Also we avoid common pitfalls like userspace modifying the
final \0 after the strlen_user().
Signed-off-by: Davi Arnaut <davi.arnaut@gmail.com>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Make the softlockup detector purely timer-interrupt driven, removing
softirq-context (timer) dependencies. This means that if the softlockup
watchdog triggers, it has truly observed a longer than 10 seconds
scheduling delay of a SCHED_FIFO prio 99 task.
(the patch also turns off the softlockup detector during the initial bootup
phase and does small style fixes)
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
If the change of personality does not lead to change of exec domain,
__set_personality() returned without releasing the module reference
acquired by lookup_exec_domain().
Signed-off-by: Sergey Vlasov <vsu@altlinux.ru>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
In filesystems with the meta block group flag on, ext3_bg_num_gdb() fails
to report the correct number of blocks used to store the group descriptor
backups in a given group. It happens because meta_bg follows a different
logic from the original ext3 backup placement in groups multiples of 3, 5
and 7.
Signed-off-by: Glauber de Oliveira Costa <glommer@br.ibm.com>
Cc: Andreas Dilger <adilger@clusterfs.com>
Cc: "Stephen C. Tweedie" <sct@redhat.com>
Cc: Alex Tomas <alex@clusterfs.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Document the fact that setrlimit(RLIMIT_CPU) doesn't return error codes when
it should. I don't think we can fix this without a 2.7.x..
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Ulrich Weigand <uweigand@de.ibm.com>
Cc: Cliff Wickman <cpw@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
At present the kernel doesn't honour an attempt to set RLIMIT_CPU to zero
seconds. But the spec says it should, and that's what 2.4.x does.
Fixing this for real would involve some complexity (such as adding a new
it-has-been-set flag to the task_struct, and testing that everwhere, instead
of overloading the value of it_prof_expires).
Given that a 2.4 kernel won't actually send the signal until one second has
expired anyway, let's just handle this case by treating the caller's
zero-seconds as one second.
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Ulrich Weigand <uweigand@de.ibm.com>
Cc: Cliff Wickman <cpw@sgi.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
- Whitespace cleanups
- Make that expression comprehensible.
There's a potential logic change here: we do the "is it_prof_expires equal to
zero" test after converting it to seconds, rather than doing the comparison
between raw cputime_t's.
But given that it's in units of seconds anyway, that shouldn't change
anything.
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Ulrich Weigand <uweigand@de.ibm.com>
Cc: Cliff Wickman <cpw@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Drivers have no business looking at the task list and thus using this lock.
The only possibly modular users left are:
arch/ia64/kernel/mca.c
drivers/edac/edac_mc.c
fs/binfmt_elf.c
which I'll send out fixes for soon.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
- Remove more unused headers
- Remove various typedefs
- Correct type of PaddrP (physical addresses should be ulong)
- Kill use of bcopy
- More printk cleanups
- Kill true/false
- Clean up direct access to pci BARs
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
- Remove more unused headers
- Remove various typedefs
- Correct type of PaddrP (physical addresses should be ulong)
- Kill use of bcopy
- More printk cleanups
- Kill true/false
- Clean up direct access to pci BARs
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Final polish. There is no more save_flags/cli type locking left. We also no
longer use the pcicopy function and file so they can go.
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Third large chunk of code cleanup. The split between this and #3 and #4 is
fairly arbitary and due to the message length limit on the list. These
patches continue the process of ripping out macros and typedefs while cleaning
up lots of 32bit assumptions. Several inlines for compatibility also get
removed and that causes a lot of noise.
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Second large chunk of code cleanup. The split between this and #3 and #4 is
fairly arbitary and due to the message length limit on the list. These
patches continue the process of ripping out macros and typedefs while cleaning
up lots of 32bit assumptions. Several inlines for compatibility also get
removed and that causes a lot of noise.
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
First large chunk of code cleanup. The split between this and #3 and #4 is
fairly arbitary and due to the message length limit on the list. These
patches continue the process of ripping out macros and typedefs while cleaning
up lots of 32bit assumptions. Several inlines for compatibility also get
removed and that causes a lot of noise.
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
More header cleanups, strip out typedefs and remove cruft. There are a lot of
magic macros that can go and also a great deal of abuse of volatile that is
not needed any more as this patch set cleans up the misuse of pointer access
to ISA and PCI space.
It now builds cleanly on 64bit, although there is more work left to do
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
After the indent we can now clean up unused code, and fix all myriad cases
that don't use readb/writeb properly.
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This is the result of indent -kr -i8 -bri0 -l255
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Strip some of the typedef mess out Remove a small subset of unused defines
and the like.
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Announce that the kernel_thread export will be removed in half a year,
after all it's users have been converted to the kthread_ API, which I plan
to do over the next month.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
In some embedded systems the IDE hardware interface may only support 16-bit
or smaller accesses. Allow the interface to specify if this is the case
and don't allow the drive or user to override the setting.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
On architectures like i386, the "Multimedia Capabilities Port drivers" menu is
visible, but it can't be visited since it contains nothing usable for
!ARCH_SA1100.
This patch therefore shows this menu only on ARCH_SA1100.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
If we don't want sys_newfstatat because __ARCH_WANT_STAT64 is defined, then
we certainly don't want compat_sys_newfstatat either.
Signed-off-by: Grant Grundler <grundler@parisc-linux.org>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
It appears that console_setup() code only gets compiled into the kernel if
CONFIG_PRINTK is enabled. One detrimental side-effect of this is that
serial8250_console_setup() never gets invoked when CONFIG_PRINTK is not
set, resulting in baud rate not being read/parsed from command line (i.e.
console=ttyS0,115200n8 is ignored, at least the baud rate part...)
Attached patch moves console_setup() code from inside
#ifdef CONFIG_PRINTK
to outside (in printk.c), removing dependence on said config. option.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
I today booted the first time my embedded device using Linux 2.6.15.2,
which was booted by pxelinux, which then bootet itself from the nfsroot.
This went pretty fine, but when I was reading through
Documentation/nfsroot.txt I saw that there are some more modern versions
available of loading the kernel and passing parameters.
Signed-off-by: Nico Schottelius <nico-kernel@schottelius.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Driver for the Secure Digital Host Controller Interface specification.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Class code and register definitions for the Secure Digital Host Controller
standard.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
No need to duplicate all that code.
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Pull the guts out of do_fsync() - we can use it elsewhere.
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
msync() does a strange thing. Essentially:
vma = find_vma();
for ( ; ; ) {
if (!vma)
return -ENOMEM;
...
vma = vma->vm_next;
}
so an msync() request which starts within or before a valid VMA and which ends
within or beyond the final VMA will incorrectly return -ENOMEM.
Fix.
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
It seems bad to hold mmap_sem while performing synchronous disk I/O. Alter
the msync(MS_SYNC) code so that the lock is released while we sync the file.
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
It seems sensible to perform dirty page throttling in msync: as the application
dirties pages we can kick off pdflush early, or even force the msync() caller
to perform writeout, or even throttle the msync() caller.
The main effect of this is to start disk writeback earlier if we've just
discovered that a large amount of pagecache has been dirtied. (Otherwise it
wouldn't happen for up to five seconds, next time pdflush wakes up).
It also will cause the page-dirtying process to get panalised for dirtying
those pages rather than whacking someone else with the problem.
We should do this for munmap() and possibly even exit(), too.
We drop the mmap_sem while performing the dirty page balancing. It doesn't
seem right to hold mmap_sem for that long.
Note that this patch only affects MS_ASYNC. MS_SYNC will be syncing all the
dirty pages anyway.
We note that msync(MS_SYNC) does a full-file-sync inside mmap_sem, and always
has. We can fix that up...
The patch also tightens up the mmap_sem coverage in sys_msync(): no point in
taking it while we perform the incoming arg checking.
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
We need set_page_dirty() to return true if it actually transitioned the page
from a clean to dirty state. This wasn't right in a couple of places. Do a
kernel-wide audit, fix things up.
This leaves open the possibility of returning a negative errno from
set_page_dirty() sometime in the future. But we don't do that at present.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Modify balance_dirty_pages_ratelimited() so that it can take a
number-of-pages-which-I-just-dirtied argument. For msync().
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Instead of using for_each_cpu(i), we can use for_each_online_cpu(i).
When a CPU goes offline (ie removed from online map), it might have a non
null bh_accounting.nr, so this patch adds a transfer of this counter to an
online CPU counter.
We already have a hotcpu_notifier, (function buffer_cpu_notify()), where we
can do this bh_accounting.
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
OPL3_HW_OPL3_PC98 #define isn't used anywhere; previously in
sound/drivers/opl3/opl3_lib.c and sound/isa/cs423x/pc98.c, the latter of which
went away with the rest of PC98 subarch.
Signed-off-by: Arthur Othieno <apgo@patchbomb.org>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
floppy98 went out together with the rest of PC98 subarch. Remove stale
Makefile entry that remained.
Signed-off-by: Arthur Othieno <apgo@patchbomb.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
SUSv3 says the shmdt() function shall fail with EINVAL if the value of
shmaddr is not the data segment start address of a shared memory segment:
our sys_shmdt needs to reject a shmaddr which is not page-aligned.
Does it have the potential to break existing apps?
Hugh says
"sys_shmdt() just does the wrong (unexpected) thing with a misaligned
address: it'll fail on what you might expect it to succeed on, and only
succeed on what it should definitely fail on.
"That is, I think it behaves as if shmaddr gets rounded up, when the only
understandable behaviour would be if it rounded it down.
"Which does mean you'd have to be devious to see anything but EINVAL from
a misaligned shmaddr there, so it's not terribly important."
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
