- 25 Mar, 2006 40 commits
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Andrew Morton authored
A couple of places are forgetting to take it. The kswapd case is probably unimportant. keventd_create_kthread() was racy. The whole thing is a bit flakey: you start a kernel thread, get its pid from kernel_thread() then look up its task_struct. a) It assumes that pid recycling takes a "long" time. b) We get a task_struct but no reference was taken on it. The owner of the kswapd and kthread task_struct*'s must assume that the new thread won't exit unexpectedly. Because if it does, they're left holding dead memory and any attempt to control or stop that task will crash. Cc: Christoph Hellwig <hch@lst.de> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Kirk True authored
When EXT3FS_DEBUG is #define-d, the compile breaks due to #include file issues. Signed-off-by:
Kirk True <kernel@kirkandsheila.com> Signed-off-by:
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Jesper Juhl authored
This fixes coverity bugs #398 and #397 Signed-off-by:
Jesper Juhl <jesper.juhl@gmail.com> Signed-off-by:
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Kirill Korotaev authored
This patch reduces scheduling latency in shrink_dcache_sb() noticed during remounting of big partitions with many cached dentries. The same latency fix was applied to select_parent() long ago. Signed-off-by:
Denis Lunev <den@sw.ru> Signed-off-by:
Pavel Emelianov <xemul@sw.ru> Signed-off-by:
Kirill Korotaev <dev@openvz.org> Signed-off-by:
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OGAWA Hirofumi authored
In here, I think the following order is more cache-friendly. Signed-off-by:
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by:
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OGAWA Hirofumi authored
freeze_bdev() uses a fsync_super() without sync_blockdev(). This patch makes __fsync_super() and shares it. Signed-off-by:
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Denis Vlasenko authored
Believe it or not, but in fs/minix/*, the oldest filesystem in the kernel, something still can be fixed: printk("new_inode: bit already set"); "\n" is missing! While at it, I also removed periods from the end of error messages and made capitalization uniform. Also s/i-node/inode/, s/printk (/printk(/ Signed-ff-by:Denis Vlasenko <vda@ilport.com.ua> Signed-off-by:
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Chris Wright authored
PTRACE_TRACEME doesn't have proper capabilities validation when parent is less privileged than child. Issue pointed out by Ram Gupta <ram.gupta5@gmail.com>. Note: I haven't identified a strong security issue, and it's a small ABI change that could break apps that rely on existing behaviour (which allows parent that is less privileged than child to ptrace when child does PTRACE_TRACEME). Signed-off-by:
Chris Wright <chrisw@sous-sol.org> Cc: Ram Gupta <ram.gupta5@gmail.com> Signed-off-by:
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Chris Wright authored
Move capable() to kernel/capability.c and eliminate duplicate implementations. Add __capable() function which can be used to check for capabiilty of any process. Signed-off-by:
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Adrian Bunk authored
This patch adds a proper prototype for setup_arch() in init.h. This patch is based on a patch by Ben Dooks <ben-linux@fluff.org>. Signed-off-by:
Adrian Bunk <bunk@stusta.de> Signed-off-by:
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Davide Libenzi authored
Implement the half-closed devices notifiation, by adding a new POLLRDHUP (and its alias EPOLLRDHUP) bit to the existing poll/select sets. Since the existing POLLHUP handling, that does not report correctly half-closed devices, was feared to be changed, this implementation leaves the current POLLHUP reporting unchanged and simply add a new bit that is set in the few places where it makes sense. The same thing was discussed and conceptually agreed quite some time ago: http://lkml.org/lkml/2003/7/12/116 Since this new event bit is added to the existing Linux poll infrastruture, even the existing poll/select system calls will be able to use it. As far as the existing POLLHUP handling, the patch leaves it as is. The pollrdhup-2.6.16.rc5-0.10.diff defines the POLLRDHUP for all the existing archs and sets the bit in the six relevant files. The other attached diff is the simple change required to sys/epoll.h to add the EPOLLRDHUP definition. There is "a stupid program" to test POLLRDHUP delivery here: http://www.xmailserver.org/pollrdhup-test.c It tests poll(2), but since the delivery is same epoll(2) will work equally. Signed-off-by:
Davide Libenzi <davidel@xmailserver.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Michael Kerrisk <mtk-manpages@gmx.net> Signed-off-by:
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Bryan Holty authored
This fix prevents re-disabling and enabling of a previously disabled interrupt. On an SMP system with irq balancing enabled; If an interrupt is disabled from within its own interrupt context with disable_irq_nosync and is also earmarked for processor migration, the interrupt is blindly moved to the other processor and enabled without regard for its current "enabled" state. If there is an interrupt pending, it will unexpectedly invoke the irq handler on the new irq owning processor (even though the irq was previously disabled) The more intuitive fix would be to invoke disable_irq_nosync and enable_irq, but since we already have the desc->lock from __do_IRQ, we cannot call them directly. Instead we can use the same logic to disable and enable found in disable_irq_nosync and enable_irq, with regards to the desc->depth. This now prevents a disabled interrupt from being re-disabled, and more importantly prevents a disabled interrupt from being incorrectly enabled on a different processor. Signed-off-by:
Bryan Holty <lgeek@frontiernet.net> Cc: Andi Kleen <ak@muc.de> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by:
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Andrew Morton authored
Uninline some massive IRQ migration functions. Put them in the new kernel/irq/migration.c. Cc: Andi Kleen <ak@muc.de> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by:
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Andrew Morton authored
sparc32: drivers/input/touchscreen/ads7846.c: In function `ads7846_read12_ser': drivers/input/touchscreen/ads7846.c:206: warning: implicit declaration of function `disable_irq' drivers/input/touchscreen/ads7846.c:208: warning: implicit declaration of function `enable_irq' Cc: Dmitry Torokhov <dtor_core@ameritech.net> Signed-off-by:
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Andrew Morton authored
In file included from drivers/char/tpm/tpm_nsc.c:23: drivers/char/tpm/tpm.h: In function `tpm_read_index': drivers/char/tpm/tpm.h:92: warning: implicit declaration of function `outb' drivers/char/tpm/tpm.h:93: warning: implicit declaration of function `inb' Signed-off-by:
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Pavel Machek authored
This adds missing bits of collie (sharp sl-5500) PCMCIA support and MFD support. Signed-off-by:
Pavel Machek <pavel@suse.cz> Acked-by:
Richard Purdie <rpurdie@rpsys.net> Signed-off-by:
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Pavel Machek authored
In frontlight support, we should really use values from flash-ROM instead of hardcoding our own. Cleanup includes. Signed-off-by:
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Adrian Bunk authored
It's already big enough and there's no reason to list maintainers of external patches. Signed-off-by:
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Jan Beulich authored
The /dev/mem and /dev/kmem write handlers weren't fully POSIX compliant in that they wouldn't always force the file pointer to be updated when returning success status. The /dev/port write handler was inconsistent with the /dev/mem and /dev/kmem handlers in that when encountering a -EFAULT condition after already having written a number of items it would return -EFAULT rather than the number of bytes written. Signed-off-by:
Jan Beulich <jbeulich@novell.com> Signed-off-by:
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Kirk True authored
When SMBFS_DEBUG_VERBOSE is #define-d, the compile breaks: fs/smbfs/inode.c:217: error: aggregate value used where an integer was expected This is a simple matter of using the .tv_sec attribute of struct time_spec. Signed-off-by:
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Eric Van Hensbergen authored
Fix documentation to match current implementation. Signed-off-by:
Eric Van Hensbergen <ericvh@gmail.com> Signed-off-by:
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Eric Van Hensbergen authored
There were a number of conflicting naming schemes used in the v9fs project. The directory was fs/9p, but MAINTAINERS and Documentation referred to v9fs. The module name itself was 9p2000, and the file system type was 9P. This patch attempts to clean that up, changing all references to 9p in order to match the directory name. We'll also start using 9p instead of v9fs as our patch prefix. There is also a minor consistency cleanup in the options changing the name option to uname in order to more closely match the Plan 9 options. Signed-off-by:
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Eric Van Hensbergen authored
Update license boilerplate to specify GPLv2 and remove the (at your option clause). This change was agreed to by all the copyright holders (approvals can be found on v9fs-developer mailing list). Signed-off-by:
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Eugene Teo authored
__getname, which in turn will call kmem_cache_alloc, may return NULL. Coverity bug #977 Signed-off-by:
Eugene Teo <eugene.teo@eugeneteo.net> Signed-off-by:
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Latchesar Ionkov authored
Implement a new way of creating special files. Instead of Tcreate+Twstat, add one more field to Tcreate that contains special file description. Signed-off-by:
Latchesar Ionkov <lucho@ionkov.net> Signed-off-by:
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Latchesar Ionkov authored
Print 9p messages. Signed-off-by:
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Russ Cox authored
The code talks about these things called tids, which I eventually figured out are tags. Signed-off-by:
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Russ Cox authored
Here is a new trans_fd.c that replaces the current trans_fd.c and trans_sock.c. Signed-off-by:
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Andrew Morton authored
The Kconfig text for CONFIG_DEBUG_SLAB and CONFIG_DEBUG_PAGEALLOC have always seemed a bit confusing. Change them to: CONFIG_DEBUG_SLAB: "Debug slab memory allocations" CONFIG_DEBUG_PAGEALLOC: "Debug page memory allocations" Cc: "David S. Miller" <davem@davemloft.net> Cc: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by:
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Bjorn Helgaas authored
Remove the assumption that driver_register() returns the number of devices bound to the driver. In fact, it returns zero for success or a negative error value. zorro_module_init() used the device count to automatically unregister and unload drivers that found no devices. That might have worked at one time, but has been broken for some time because zorro_register_driver() returned either a negative error or a positive count (never zero). So it could only unregister on failure, when it's not needed anyway. This functionality could be resurrected in individual drivers by counting devices in their .probe() methods. Signed-off-by:
Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by:
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Bjorn Helgaas authored
Remove the assumption that driver_register() returns the number of devices bound to the driver. In fact, it returns zero for success or a negative error value. Signed-off-by:
Jeff Garzik <jgarzik@pobox.com> Acked-by:
Marc Zyngier <maz@misterjones.org> Signed-off-by:
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Bjorn Helgaas authored
Remove the assumption that driver_register() returns the number of devices bound to the driver. In fact, it returns zero for success or a negative error value. dio_module_init() used the device count to automatically unregister and unload drivers that found no devices. That might have worked at one time, but has been broken for some time because dio_register_driver() returned either a negative error or a positive count (never zero). So it could only unregister on failure, when it's not needed anyway. This functionality could be resurrected in individual drivers by counting devices in their .probe() methods. Signed-off-by:
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Alexander Zarochentsev authored
Use the new balance_dirty_pages_ratelimited_nr in reiserfs "largeio" file write. Signed-off-by:
Hans Reiser <reiser@namesys.com> Signed-off-by:
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Andrew Morton authored
We presently ignore the return values from initcalls. But that can carry useful debugging information. So print it out if it's non-zero. It turns out the -ENODEV happens quite a lot, due to built-in drivers which have no hardware to drive. So suppress that unless initcall_debug was specified. Also make the warning message more friendly by printing the name of the initcall function. Also drop the KERN_DEBUG from the initcall_debug message. If we specified inticall_debug then we obviously want to see the messages. Acked-by:
Paul Jackson <pj@sgi.com> Signed-off-by:
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Vladimir V. Saveliev authored
Clean up several places where gcc issues warnings when -W is specified. Thanks to Neil for finding that. Signed-off-by:
Vladimir V. Saveliev <vs@namesys.com> Cc: Neil Brown <neilb@cse.unsw.edu.au> Signed-off-by:
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Rene Herman authored
Today I wondered about /dev/parport<n> after not seeing anything in drivers/parport register char-major-99. Having PP_MAJOR in include/linux/major.h would've allowed me to more quickly determine that it was the ppdev driver driving these. Signed-off-by:
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Sam Ravnborg authored
In latest -mm a number of section mismatch warnings are generated for floppy.o like the following: WARNING: drivers/block/floppy.o - Section mismatch: reference to \ .init.data: from .text between 'init_module' (at offset 0x6976) and \ 'cleanup_module' The warning are caused by a reference to floppy_init() which is __init from init_module() which is not declared __init. Declaring init_module() _init fixes this. Signed-off-by:
Sam Ravnborg <sam@ravnborg.org> Signed-off-by:
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Sam Ravnborg authored
In latest -mm ide-code.o gave a number of warnings like the following: WARNING: drivers/ide/ide-core.o - Section mismatch: reference to \ .init.text: from .text between 'init_module' (at offset 0x1f97) and \ 'cleanup_module' The warning was caused by init_module() calling parse_option() and ide_init() both declared __init. Declaring init_module() __init fixes the warnings. Signed-off-by:
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Nick Piggin authored
Previous inotify work avoidance is good when inotify is completely unused, but it breaks down if even a single watch is in place anywhere in the system. Robin Holt notices that udev is one such culprit - it slows down a 512-thread application on a 512 CPU system from 6 seconds to 22 minutes. Solve this by adding a flag in the dentry that tells inotify whether or not its parent inode has a watch on it. Event queueing to parent will skip taking locks if this flag is cleared. Setting and clearing of this flag on all child dentries versus event delivery: this is no in terms of race cases, and that was shown to be equivalent to always performing the check. The essential behaviour is that activity occuring _after_ a watch has been added and _before_ it has been removed, will generate events. Signed-off-by:
Nick Piggin <npiggin@suse.de> Cc: Robert Love <rml@novell.com> Cc: John McCutchan <ttb@tentacle.dhs.org> Signed-off-by:
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Andrew Morton authored
sysrq.c is fairly revolting. Fix. Signed-off-by:
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