09 May, 2007
35 commits
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Whitespace cleanup only: convert some series of spaces to tabs.
Signed-off-by: Randy Dunlap
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
sb_read may return NULL, let's explicitly check it. If so free new bitmap
blocks array, after this we may safely exit as it done above during bitmap
allocation.Signed-off-by: Dmitriy Monakhov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
sb_read may return NULL, so let's explicitly check it.
Signed-off-by: Dmitriy Monakhov
Acked-by: Christoph Hellwig
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Replace (n & (n-1)) in the context of power of 2 checks with is_power_of_2
Signed-off-by: vignesh babu
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Replace (n & (n-1)) in the context of power of 2 checks with is_power_of_2
Signed-off-by: vignesh babu
Cc: Roman Zippel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Replacing (n & (n-1)) in the context of power of 2 checks with
is_power_of_2Signed-off-by: vignesh babu
Acked-by: OGAWA Hirofumi
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
- make needlessly global code static
- remove the unused EXPORT_SYMBOL'sSigned-off-by: Adrian Bunk
Acked-by: Stephen Rothwell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The tty driver write method is different to the usual fops device write
methods as the buffer is already in kernel space. Clarify the docs since
someone writing a driver made that mistake.Signed-off-by: Alan Cox
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Currently, devpts doesn't generate an fsnotify event upon pts creation
because the regular vfs paths aren't involved. Deallocation, on the other
hand, correctly generates a nameremove event thanks to the d_delete()
invocation in devpts_pty_kill().This patch adds the missing fsnotify_create() trigger in devpts_pty_new().
Signed-off-by: Florin Malita
Acked-by: H. Peter Anvin
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add SEEK_MAX and use it to validate lseek arguments from userspace.
Signed-off-by: Chris Snook
Acked-by: David Howells
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Convert magic numbers to SEEK_* values from fs.h
Signed-off-by: Chris Snook
Acked-by: David Howells
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add a paragraph in Documentation/SubmittingDrivers requesting that the
basic PM support be provided by new device drivers.Add two new documents in Documentation/power/ giving general instructions
on debugging the suspend/resume functionality and testing the suspend and
resume support in device drivers.Signed-off-by: Rafael J. Wysocki
Cc: Pavel Machek
Cc: David Brownell
Cc: Nigel Cunningham
Cc: Alan Cox
Cc: Greg KH
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Constant folding does not work for the swabXX() byte swapping functions,
and the C versions optimize poorly.Attempting to initialize a global variable to swab16(0x1234) or put
something like "case swab32(42):" in a switch statement will not compile.
It can work, swab.h just isn't doing it correctly. This patch fixes that.Contrary to the comment in asm-i386/byteorder.h, gcc does not recognize the
"C" version of swab16 and turn it into efficient code. gcc can do this,
just not with the current code. The simple function:u16 foo(u16 x) { return swab16(x); }
Would compile to:
movzwl %ax, %eax
movl %eax, %edx
shrl $8, %eax
sall $8, %edx
orl %eax, %edxWith this patch, it will compile to:
rolw $8, %axI also attempted to document the maze different macros/inline functions
that are used to create the final product.Signed-off-by: Trent Piepho
Cc: Francois-Rene Rideau
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Don't use hardcoded 99 value, use MAX_RT_PRIO.
Signed-off-by: Oleg Nesterov
Cc: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Except for BUG_ON() checks, we should not use EXIT_XXXX defines outside of
exit/wait paths.Signed-off-by: Oleg Nesterov
Cc: "Rafael J. Wysocki"
Cc: Pavel Machek
Cc: Ingo Molnar
Cc: Nick Piggin
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add pci_remove handling to the driver, so it will clean up if
the device is hot-removed.Signed-off-by: Corey Minyard
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Convert over to the new NMI handling for getting IPMI watchdog timeouts via an
NMI. This add config options to know if there is the ability to receive NMIs
and if it has an NMI post processing call. Then it modifies the IPMI watchdog
to take advantage of this so that it can know if an NMI comes in.It also adds testing that the IPMI NMI watchdog works.
Signed-off-by: Corey Minyard
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The IPMI driver used enable_irq and disable_irq when it got into situations
where it couldn't allocate memory; it did this to avoid having the interrupt
just lock the machine when it couldn't get memory to perform the transaction
to disable the interrupt.This patch modifies the driver to not use disable_irq and enable_irq. It
instead sends the messages to the BMC to perform this operation. It also
makes sure interrupts are cleanly disabled when the interface is shut down and
cleans up some shutdown things that are no longer necessary.Signed-off-by: Corey Minyard
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add support for of_platform_driver to the ipmi_si module. When loading the
module, the driver will be registered to of_platform. The driver will be
probed for all devices with the type ipmi. It's supporting devices with
compatible settings ipmi-kcs, ipmi-smic and ipmi-bt. Only ipmi-kcs could be
tested.Signed-off-by: Christian Krafft
Acked-by: Heiko J Schick
Signed-off-by: Corey Minyard
Acked-by: Arnd Bergmann
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Teach the dentry slab shrinker to aggressively shrink parent dentries when
shrinking the dentry cache.This is done to attempt to improve the situation where the dentry slab cache
gets a lot of internal fragmentation due to pages containing directory
dentries. It is expected that this change will cause some of those dentries
to be reaped earlier, and with less scanning.Needs careful testing.
Cc: Miklos Szeredi
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The time shrink_dcache_parent() takes, grows quadratically with the depth
of the tree under 'parent'. This starts to get noticable at about 10,000.These kinds of depths don't occur normally, and filesystems which invoke
shrink_dcache_parent() via d_invalidate() seem to have other depth
dependent timings, so it's not even easy to expose this problem.However with FUSE it's easy to create a deep tree and d_invalidate()
will also get called. This can make a syscall hang for a very long
time.This is the original discovery of the problem by Russ Cox:
http://article.gmane.org/gmane.comp.file-systems.fuse.devel/3826
The following patch fixes the quadratic behavior, by optionally allowing
prune_dcache() to prune ancestors of a dentry in one go, instead of doing
it one at a time.Common code in dput() and prune_one_dentry() is extracted into a new helper
function d_kill().shrink_dcache_parent() as well as shrink_dcache_sb() are converted to use
the ancestry-pruner option. Only for shrink_dcache_memory() is this
behavior not desirable, so it keeps using the old algorithm.Signed-off-by: Miklos Szeredi
Cc: Al Viro
Cc: Maneesh Soni
Acked-by: "Paul E. McKenney"
Cc: Dipankar Sarma
Cc: Neil Brown
Cc: Trond Myklebust
Cc: Christoph Hellwig
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This past week I was playing around with that pahole tool
(http://oops.ghostprotocols.net:81/acme/dwarves/) and looking at the size
of various struct in the kernel. I was surprised by the size of the
task_struct on x86_64, approaching 4K. I looked through the fields in
task_struct and found that a number of them were declared as "unsigned
long" rather than "unsigned int" despite them appearing okay as 32-bit
sized fields. On x86_64 "unsigned long" ends up being 8 bytes in size and
forces 8 byte alignment. Is there a reason there a reason they are
"unsigned long"?The patch below drops the size of the struct from 3808 bytes (60 64-byte
cachelines) to 3760 bytes (59 64-byte cachelines). A couple other fields
in the task struct take a signficant amount of space:struct thread_struct thread; 688
struct held_lock held_locks[30]; 1680CONFIG_LOCKDEP is turned on in the .config
[akpm@linux-foundation.org: fix printk warnings]
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Taken from http://bugzilla.kernel.org/show_bug.cgi?id=5079
signed long ranges from -2.147.483.648 to 2.147.483.647 on x86 32bit
10000011110110100100111110111101 .. -2,082,844,739
10000011110110100100111110111101 .. 2,212,122,557
Cc:Andreas says:
This patch is now treating timestamps with the high bit set as negative
times (before Jan 1, 1970). This means we lose 1/2 of the possible range
of timestamps (lopping off 68 years before unix timestamp overflow -
now only 30 years away :-) to handle the extremely rare case of setting
timestamps into the distant past.If we are only interested in fixing the underflow case, we could just
limit the values to 0 instead of storing negative values. At worst this
will skew the timestamp by a few hours for timezones in the far east
(files would still show Jan 1, 1970 in "ls -l" output).That said, it seems 32-bit systems (mine at least) allow files to be set
into the past (01/01/1907 works fine) so it seems this patch is bringing
the x86_64 behaviour into sync with other kernels.On the plus side, we have a patch that is ready to add nanosecond timestamps
to ext3 and as an added bonus adds 2 high bits to the on-disk timestamp so
this extends the maximum date to 2242.Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
/proc/$PID/fd has r-x------ permissions, so if process does setuid(), it
will not be able to access /proc/*/fd/. This breaks fstatat() emulation
in glibc.open("foo", O_RDONLY|O_DIRECTORY) = 4
setuid32(65534) = 0
stat64("/proc/self/fd/4/bar", 0xbfafb298) = -1 EACCES (Permission denied)Signed-off-by: Alexey Dobriyan
Cc: "Eric W. Biederman"
Cc: James Morris
Cc: Chris Wright
Cc: Ulrich Drepper
Cc: Oleg Nesterov
Acked-By: Kirill Korotaev
Cc: Al Viro
Cc: Christoph Hellwig
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Simplify the stacktrace code:
- remove the unused task argument to save_stack_trace, it's always
current
- remove the all_contexts flag, it's alwasy 0Signed-off-by: Christoph Hellwig
Cc: Paul Mundt
Cc: Ralf Baechle
Cc: Martin Schwidefsky
Cc: "David S. Miller"
Cc: Andi Kleen
Cc: Akinobu Mita
Acked-by: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
block_write_full_page() forgot to propagate ENPSOC into the address_space.
Cc: Guillaume Chazarain
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Cleanup: setting an outstanding error on a mapping was open coded too many
times. Factor it out in mapping_set_error().Signed-off-by: Guillaume Chazarain
Cc: Steven Whitehouse
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The ever-vigilant users of linode.com noticed that an idle 2.6 UML has a
persistent load average of ~.4.It turns out that because the UML timer handler processed softirqs before
actually delivering the tick, the tick was counted in the context of the idle
thread about half the time.Signed-off-by: Jeff Dike
Cc: Paolo 'Blaisorblade' Giarrusso
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
hostfs needed some style goodness.
Signed-off-by: Jeff Dike
Cc: Paolo 'Blaisorblade' Giarrusso
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch allows hostfs_setattr() to work on unlinked open files by calling
set_attr() (the userspace part) with the inode's fd.Without this, applications that depend on doing attribute changes to unlinked
open files will fail.It works by using the fd versions instead of the path ones (for example
fchmod() instead of chmod(), fchown() instead of chown()) when an fd is
available.Signed-off-by: Alberto Bertogli
Signed-off-by: Jeff Dike
Cc: Paolo 'Blaisorblade' Giarrusso
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Use SLAB_PANIC and delete duplicated panic().
Signed-off-by: Akinobu Mita
Cc: Ian Molton
Cc: David Howells
Cc: Andi Kleen
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: Paul Mundt
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch is add white list into modpost.c for some functions and
ia64's section to fix section mismatchs.sparse_index_alloc() and zone_wait_table_init() calls bootmem allocator
at boot time, and kmalloc/vmalloc at hotplug time. If config
memory hotplug is on, there are references of bootmem allocater(init text)
from them (normal text). This is cause of section mismatch.Bootmem is called by many functions and it must be
used only at boot time. I think __init of them should keep for
section mismatch check. So, I would like to register sparse_index_alloc()
and zone_wait_table_init() into white list.In addition, ia64's .machvec section is function table of some platform
dependent code. It is mixture of .init.text and normal text. These
reference of __init functions are valid too.Signed-off-by: Yasunori Goto
Cc: Sam Ravnborg
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This is to fix many section mismatches of code related to memory hotplug.
I checked compile with memory hotplug on/off on ia64 and x86-64 box.Signed-off-by: Yasunori Goto
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
[akpm@linux-foundation.org: cleanup]
Signed-off-by: Monakhov Dmitriy
Cc: Christoph Hellwig
Acked-by: Anton Altaparmakov
Acked-by: David Chinner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
There are two problems with the existing redzone implementation.
Firstly, it's causing misalignment of structures which contain a 64-bit
integer, such as netfilter's 'struct ipt_entry' -- causing netfilter
modules to fail to load because of the misalignment. (In particular, the
first check in
net/ipv4/netfilter/ip_tables.c::check_entry_size_and_hooks())On ppc32 and sparc32, amongst others, __alignof__(uint64_t) == 8.
With slab debugging, we use 32-bit redzones. And allocated slab objects
aren't sufficiently aligned to hold a structure containing a uint64_t.By _just_ setting ARCH_KMALLOC_MINALIGN to __alignof__(u64) we'd disable
redzone checks on those architectures. By using 64-bit redzones we avoid that
loss of debugging, and also fix the other problem while we're at it.When investigating this, I noticed that on 64-bit platforms we're using a
32-bit value of RED_ACTIVE/RED_INACTIVE in the 64-bit memory location set
aside for the redzone. Which means that the four bytes immediately before
or after the allocated object at 0x00,0x00,0x00,0x00 for LE and BE
machines, respectively. Which is probably not the most useful choice of
poison value.One way to fix both of those at once is just to switch to 64-bit
redzones in all cases.Signed-off-by: David Woodhouse
Acked-by: Pekka Enberg
Cc: Christoph Lameter
Acked-by: David S. Miller
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
08 May, 2007
5 commits
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* master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6:
[SCSI] esp_scsi: Fix section mismatch warnings.
[VIDEO] sunxvr2500: Fix PCI device ID table. -
More fallout from the removal of "struct subsystem" from the core device
model.Signed-off-by: Linus Torvalds
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Signed-off-by: Martin Habets
Signed-off-by: David S. Miller -
Noticed by Meelis Roos.
Signed-off-by: David S. Miller
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* git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
[IA64] update memory attribute aliasing documentation & test cases
[IA64] fail mmaps that span areas with incompatible attributes
[IA64] allow WB /sys/.../legacy_mem mmaps
[IA64] make ioremap avoid unsupported attributes
[IA64] rename ioremap variables to match i386
[IA64] relax per-cpu TLB requirement to DTC
[IA64] remove per-cpu ia64_phys_stacked_size_p8
[IA64] Fix example error injection program
[IA64] Itanium MC Error Injection Tool: pal_mc_error_inject() interface
[IA64] Itanium MC Error Injection Tool: Makefile changes
[IA64] Itanium MC Error Injection Tool: Driver sysfs interface
[IA64] Itanium MC Error Injection Tool: Doc and sample application
[IA64] Itanium MC Error Injection Tool: Kernel configuration
