- 08 May, 2007 40 commits
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Pekka Enberg authored
This converts an open-coded krealloc() to use the shiny new API. Signed-off-by:
Pekka Enberg <penberg@cs.helsinki.fi> Acked-by:
Rusty Russell <rusty@rustcorp.com.au> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Alexey Dobriyan authored
This makes in-core superblock fit into one cacheline here. Before: struct dentry * xattr_root; /* 124 4 */ /* --- cacheline 1 boundary (128 bytes) --- */ struct rw_semaphore xattr_dir_sem; /* 128 12 */ int j_errno; /* 140 4 */ }; /* size: 144, cachelines: 2 */ /* sum members: 142, holes: 1, sum holes: 2 */ /* last cacheline: 16 bytes */ After: int j_errno; /* 124 4 */ /* --- cacheline 1 boundary (128 bytes) --- */ }; /* size: 128, cachelines: 1 */ /* sum members: 126, holes: 1, sum holes: 2 */ Signed-off-by:Alexey Dobriyan <adobriyan@gmail.com> Cc: <reiserfs-dev@namesys.com> Signed-off-by:
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Nicolas Boichat authored
This driver provides support for the Apple System Management Controller, which provides an accelerometer (Apple Sudden Motion Sensor), light sensors, temperature sensors, keyboard backlight control and fan control. Only Intel-based Apple's computers are supported (MacBook Pro, MacBook, MacMini). [bunk@stusta.de: make drivers/hwmon/applesmc.c:backlight_work stati] [khali@linux-fr.org: fix temperature attribute file names] Signed-off-by:
Nicolas Boichat <nicolas@boichat.ch> Cc: Jean Delvare <khali@linux-fr.org> Cc: Dmitry Torokhov <dtor@mail.ru> Signed-off-by:
Jean Delvare <khali@linux-fr.org> Signed-off-by:
Adrian Bunk <bunk@stusta.de> Signed-off-by:
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Michal Schmidt authored
It is sometimes useful to compile individual drivers with optimization disabled for easier debugging. Currently drivers which use htonl() and similar functions don't compile with -O0. This patch fixes it. It also removes obsolete and misleading comments. This header is not for userspace, so we don't have to care about strange programs these comments mention. (akpm: -O0 probably isn't a good idea, but this code looks pretty crufty and unuseful) Signed-off-by:
Michal Schmidt <mschmidt@redhat.com> Signed-off-by:
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Adrian Bunk authored
Add a proper protype for prepare_namespace() in include/linux/init.h. Signed-off-by:
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Sam Ravnborg authored
kbuild spits outs following warning on a defconfig x86_64 build: WARNING: swiotlb.o - Section mismatch: reference to .init.text:swiotlb_init from __ksymtab between '__ksymtab_swiotlb_init' (at offset 0xa0) and '__ksymtab_swiotlb_free_coherent' This warning happens because the function swiotlb_init is marked __init and EXPORT_SYMBOL(). A 'git grep swiotlb_init' showed no users in drivers/ so remove the EXPORT_SYMBOL. Signed-off-by:
Sam Ravnborg <sam@ravnborg.org> Cc: Andi Kleen <ak@suse.de> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by:
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Randy Dunlap authored
Whitespace cleanup only: convert some series of spaces to tabs. Signed-off-by:
Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by:
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Dmitriy Monakhov authored
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 <dmonakhov@openvz.org> Signed-off-by:
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Dmitriy Monakhov authored
sb_read may return NULL, so let's explicitly check it. Signed-off-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
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Vignesh Babu BM authored
Replace (n & (n-1)) in the context of power of 2 checks with is_power_of_2 Signed-off-by:
vignesh babu <vignesh.babu@wipro.com> Signed-off-by:
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Vignesh Babu BM authored
Replace (n & (n-1)) in the context of power of 2 checks with is_power_of_2 Signed-off-by:
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Vignesh Babu BM authored
Replacing (n & (n-1)) in the context of power of 2 checks with is_power_of_2 Signed-off-by:
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by:
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Adrian Bunk authored
- make needlessly global code static - remove the unused EXPORT_SYMBOL's Signed-off-by:
Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by:
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Alan authored
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 <alan@redhat.com> Signed-off-by:
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Florin Malita authored
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 <fmalita@gmail.com> Acked-by:
H. Peter Anvin <hpa@zytor.com> Signed-off-by:
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Chris Snook authored
Add SEEK_MAX and use it to validate lseek arguments from userspace. Signed-off-by:
Chris Snook <csnook@redhat.com> Acked-by:
David Howells <dhowells@redhat.com> Signed-off-by:
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Chris Snook authored
Convert magic numbers to SEEK_* values from fs.h Signed-off-by:
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Rafael J. Wysocki authored
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 <rjw@sisk.pl> Cc: Pavel Machek <pavel@ucw.cz> Cc: David Brownell <david-b@pacbell.net> Cc: Nigel Cunningham <ncunningham@linuxmail.org> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Greg KH <greg@kroah.com> Signed-off-by:
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Trent Piepho authored
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, %edx With this patch, it will compile to: rolw $8, %ax I also attempted to document the maze different macros/inline functions that are used to create the final product. Signed-off-by:Trent Piepho <xyzzy@speakeasy.org> Cc: Francois-Rene Rideau <fare@tunes.org> Signed-off-by:
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Oleg Nesterov authored
Don't use hardcoded 99 value, use MAX_RT_PRIO. Signed-off-by:
Oleg Nesterov <oleg@tv-sign.ru> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by:
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Oleg Nesterov authored
Except for BUG_ON() checks, we should not use EXIT_XXXX defines outside of exit/wait paths. Signed-off-by:
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Corey Minyard authored
Add pci_remove handling to the driver, so it will clean up if the device is hot-removed. Signed-off-by:
Corey Minyard <minyard@acm.org> Signed-off-by:
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Corey Minyard authored
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:
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Corey Minyard authored
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 <cminyard@mvista.com> Signed-off-by:
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Corey Minyard authored
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 <krafft@de.ibm.com> Acked-by:
Heiko J Schick <schihei@de.ibm.com> Signed-off-by:
Arnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by:
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Andrew Morton authored
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 <mszeredi@suse.cz> Signed-off-by:
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Miklos Szeredi authored
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 <mszeredi@suse.cz> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Maneesh Soni <maneesh@in.ibm.com> Acked-by:
"Paul E. McKenney" <paulmck@us.ibm.com> Cc: Dipankar Sarma <dipankar@in.ibm.com> Cc: Neil Brown <neilb@suse.de> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by:
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William Cohen authored
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]; 1680 CONFIG_LOCKDEP is turned on in the .config [akpm@linux-foundation.org: fix printk warnings] Cc: <linux-arch@vger.kernel.org> Signed-off-by:
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Markus Rechberger authored
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 <- this currently gets stored on the disk but when converting it to a 64bit signed long value it loses its sign and becomes positive. Cc: Andreas Dilger <adilger@dilger.ca> Cc: <linux-ext4@vger.kernel.org> 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:
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Alexey Dobriyan authored
/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 <adobriyan@openvz.org> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: James Morris <jmorris@namei.org> Cc: Chris Wright <chrisw@sous-sol.org> Cc: Ulrich Drepper <drepper@redhat.com> Cc: Oleg Nesterov <oleg@tv-sign.ru> Acked-By:
Kirill Korotaev <dev@openvz.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by:
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Christoph Hellwig authored
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 0 Signed-off-by:
Ingo Molnar <mingo@elte.hu> Signed-off-by:
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Andrew Morton authored
block_write_full_page() forgot to propagate ENPSOC into the address_space. Cc: Guillaume Chazarain <guichaz@yahoo.fr> Signed-off-by:
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Guillaume Chazarain authored
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 <guichaz@yahoo.fr> Cc: Steven Whitehouse <swhiteho@redhat.com> Signed-off-by:
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Jeff Dike authored
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 <jdike@linux.intel.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by:
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Jeff Dike authored
hostfs needed some style goodness. Signed-off-by:
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Alberto Bertogli authored
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 <albertito@gmail.com> Signed-off-by:
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Akinobu Mita authored
Use SLAB_PANIC and delete duplicated panic(). Signed-off-by:
Akinobu Mita <akinobu.mita@gmail.com> Cc: Ian Molton <spyro@f2s.com> Cc: David Howells <dhowells@redhat.com> Cc: Andi Kleen <ak@suse.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mundt <lethal@linux-sh.org> Signed-off-by:
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Yasunori Goto authored
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 <y-goto@jp.fujitsu.com> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by:
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Yasunori Goto authored
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:
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Dmitriy Monakhov authored
[akpm@linux-foundation.org: cleanup] Signed-off-by:
Anton Altaparmakov <aia21@cam.ac.uk> Acked-by:
David Chinner <dgc@sgi.com> Signed-off-by:
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