- 28 Mar, 2006 40 commits
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KAMEZAWA Hiroyuki authored
This patch replaces for_each_cpu with for_each_possible_cpu. Signed-off-by:
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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KAMEZAWA Hiroyuki authored
replaces for_each_cpu with for_each_possible_cpu(). Signed-off-by:
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KAMEZAWA Hiroyuki authored
for_each_cpu() is a for-loop over cpu_possible_map. for_each_online_cpu is for-loop cpu over cpu_online_map. .....for_each_cpu() is not sufficiently explicit and can lead to mistakes. This patch adds for_each_possible_cpu() in preparation for the removal of for_each_cpu(). Signed-off-by:
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Vadim Lobanov authored
Remove an unnecessary level of indirection in allocating and freeing select bits, as per the select_bits_alloc() and select_bits_free() functions. Both select.c and compat.c are updated. Signed-off-by:
Vadim Lobanov <vlobanov@speakeasy.net> Signed-off-by:
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Eric Dumazet authored
Cc: Andi Kleen <ak@muc.de> Signed-off-by:
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Andi Kleen authored
Optimize select and poll by a using stack space for small fd sets This brings back an old optimization from Linux 2.0. Using the stack is faster than kmalloc. On a Intel P4 system it speeds up a select of a single pty fd by about 13% (~4000 cycles -> ~3500) It also saves memory because a daemon hanging in select or poll will usually save one or two less pages. This can add up - e.g. if you have 10 daemons blocking in poll/select you save 40KB of memory. I did a patch for this long ago, but it was never applied. This version is a reimplementation of the old patch that tries to be less intrusive. I only did the minimal changes needed for the stack allocation. The cut off point before external memory is allocated is currently at 832bytes. The system calls always allocate this much memory on the stack. These 832 bytes are divided into 256 bytes frontend data (for the select bitmaps of the pollfds) and the rest of the space for the wait queues used by the low level drivers. There are some extreme cases where this won't work out for select and it falls back to allocating memory too early - especially with very sparse large select bitmaps - but the majority of processes who only have a small number of file descriptors should be ok. [TBD: 832/256 might not be the best split for select or poll] I suspect more optimizations might be possible, but they would be more complicated. One way would be to cache the select/poll context over multiple system calls because typically the input values should be similar. Problem is when to flush the file descriptors out though. Signed-off-by:
Andi Kleen <ak@suse.de> Cc: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by:
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Andrew Morton authored
drivers/ide/pci/generic.c:45: warning: `ide_generic_all_on' defined but not used Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl> Signed-off-by:
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Alan Cox authored
Some quick backport bits from the libata PATA work to fix things found in the sis driver. The piix driver needs some fixes too but those are way to large and need someone working on old IDE with time to do them. This patch fixes the case where random bits get loaded into SIS timing registers according to the description of the correct behaviour from Vojtech Pavlik. It also adds the SiS5517 ATA16 chipset which is not currently supported by the driver. Thanks to Conrad Harriss for loaning me the machine with the 5517 chipset. Signed-off-by:
Alan Cox <alan@redhat.com> Acked-by:
Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by:
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Rene Herman authored
>From http://marc.theaimsgroup.com/?l=linux-kernel&m=110304128900342&w=2 AMD756 doesn't support host side cable detection. Do disk side only and don't advice obsolete options. Acked-by:
Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by:
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Adrian Bunk authored
Add a proper prototype for autofs4_dentry_release() to autofs_i.h. Signed-off-by:
Adrian Bunk <bunk@stusta.de> Signed-off-by:
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Alexey Dobriyan authored
A size_t can't be < 0. (akpm: and rw_verify_area() already did that check) Signed-off-by:
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Andrew Morton authored
This is obsolete. Cc: Tom Zanussi <zanussi@us.ibm.com> Cc: Jens Axboe <axboe@suse.de> Cc: Greg KH <greg@kroah.com> Signed-off-by:
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Philip Gladstone authored
I noticed that my email address is four jobs ago. Signed-off-by:
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Adrian Bunk authored
Add proper prototypes for fat_cache_init() and fat_cache_destroy() in msdos_fs.h. Signed-off-by:
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by:
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Adrian Bunk authored
The Coverity checker found this off-by-one error. Signed-off-by:
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Eric Sesterhenn authored
Since dash2underscore() just operates and returns chars, I guess its safe to change the return value to a char. With my .config, this reduces its size by 5 bytes. text data bss dec hex filename 4155 152 0 4307 10d3 params.o.orig 4150 152 0 4302 10ce params.o Signed-off-by:
Eric Sesterhenn <snakebyte@gmx.de> Signed-off-by:
Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by:
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Serge E. Hallyn authored
(akpm: I don't do comment typos patches. This one snuck through by accident) Signed-off-by:
Serge Hallyn <serue@us.ibm.com> Signed-off-by:
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Andrew Morton authored
Renumber the recently-added POLLREMOVE and POLLRDHUP to line up with the other architectures. Cc: Davide Libenzi <davidel@xmailserver.org> Cc: Ulrich Drepper <drepper@redhat.com> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Richard Henderson <rth@twiddle.net> Signed-off-by:
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Brian Rogan authored
On ppc64 we look at a profiling register to work out the sample address and if it was in userspace or kernel. The backtrace interface oprofile_add_sample does not allow this. Create oprofile_add_ext_sample and make oprofile_add_sample use it too. Signed-off-by:
Anton Blanchard <anton@samba.org> Cc: Philippe Elie <phil.el@wanadoo.fr> Cc: John Levon <levon@movementarian.org> Signed-off-by:
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Andrew Morton authored
gcc-4.2: kernel/module.c: In function '__find_symbol': kernel/module.c:158: warning: the address of '__start___kcrctab', will always evaluate as 'true' kernel/module.c:165: warning: the address of '__start___kcrctab_gpl', will always evaluate as 'true' kernel/module.c:182: warning: the address of '__start___kcrctab_gpl_future', will always evaluate as 'true' Signed-off-by:
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Andrew Morton authored
If the user specified `major=0' (odd thing to do), capi.c will use dynamic allocation. We need to pick up that major for subsequent unregister_chrdev(). Acked-by:
Karsten Keil <kkeil@suse.de> Signed-off-by:
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Andrew Morton authored
If the user specified `major=0' (odd thing to do), pt.c will use dynamic allocation. We need to pick up that major for subsequent unregister_chrdev(). Signed-off-by:
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Andrew Morton authored
If the user specified `major=0' (odd thing to do), pg.c will use dynamic allocation. We need to pick up that major for subsequent unregister_chrdev(). Signed-off-by:
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Adrian Bunk authored
It's purely cosmetic, but with the patch there's no longer a BLK_DEV_RAM_COUNT setting in the .config if BLK_DEV_RAM=n. Signed-off-by:
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Paul Fulghum authored
Remove code in async receive handling that serves no purpose with new tty receive buffering. Previously this code tried to free up receive buffer space, but now does nothing useful while making expensive calls. Signed-off-by:
Paul Fulghum <paulkf@microgate.com> Signed-off-by:
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Paul Fulghum authored
Add driver support for general purpose I/O feature of the Synclink GT adapters. Signed-off-by:
Paul Fulghum <paulkf@micrgate.com> Signed-off-by:
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Paul Fulghum authored
Remove dead code from synclink driver. This was used previously when the write method had a from_user flag, which has been removed. Signed-off-by:
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Kyle McMartin authored
Now that Christoph Lameter's atomic_long_t support is merged in mainline, might as well convert asm-generic/local.h to use it, so the same code can be used for both sizes of 32 and 64-bit unsigned longs. akpm sayeth: Q: Is there any particular reason why these routines weren't simply implemented with local_save/restore_flags, if they are only meant to guarantee atomicity to the local cpu? I'm sure on most platforms this would be more efficient than using an atomic... A: The whole _point_ of local_t is to avoid local_irq_disable(). It's designed to exploit the fact that many CPUs can do incs and decs in a way which is atomic wrt local interrupts, but not atomic wrt SMP. But this patch makes sense, because asm-generic/local.h is just a fallback implementation for architectures which either cannot perform these local-irq-atomic operations, or its maintainers haven't yet got around to implementing them. We need more work done on local_t in the 2.6.17 timeframe - they're defined as unsigned long, but some architectures implement them as signed long. Signed-off-by:
Kyle McMartin <kyle@parisc-linux.org> Cc: Benjamin LaHaise <bcrl@kvack.org> Signed-off-by:
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Matt Mackall authored
Remove some duplicate BCD definitions Signed-off-by:
Matt Mackall <mpm@selenic.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by:
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Matt Mackall authored
Fix up some RTC whitespace and style Signed-off-by:
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Matt Mackall authored
The sync may still be needed for CPU clock calibration but we don't sync in the regular case. Signed-off-by:
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Matt Mackall authored
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Matt Mackall authored
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Matt Mackall authored
Move real_year inside the read loop and move the spinlock up as well Signed-off-by:
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Matt Mackall authored
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Matt Mackall authored
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Matt Mackall authored
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Matt Mackall authored
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Matt Mackall authored
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Matt Mackall authored
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