- 06 Jan, 2009 40 commits
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Jesper Juhl authored
Signed-off-by:
Jesper Juhl <jj@chaosbits.net> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Randy Dunlap authored
Eliminate sysrq terse help mode; make sysrq help messages more meaningful (more explicit/verbose). Make the sysrq action letter clearer by listing it explicitly in more sysrq help messages (when it is not simple/clear). The SysRq help message now looks like this: SysRq : HELP : loglevel(0-9) reBoot terminate-all-tasks(E) memory-full-oom-kill(F) kill-all-tasks(I) saK show-backtrace-all-active-cpus(L) show-memory-usage(M) nice-all-RT-tasks(N) powerOff show-registers(P) show-all-timers(Q) unRaw Sync show-task-states(T) Unmount show-blocked-tasks(W) Addresses http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=330403. Signed-off-by:
Randy Dunlap <randy.dunlap@oracle.com> Cc: <jidanni@jidanni.org> Cc: <330403@bugs.debian.org> Signed-off-by:
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Randy Dunlap authored
Fix kernel-doc notation: Warning(linux-2.6.28-git3//fs/inode.c:120): No description found for parameter 'sb' Warning(linux-2.6.28-git3//fs/inode.c:120): No description found for parameter 'inode' Warning(linux-2.6.28-git3//fs/inode.c:588): No description found for parameter 'sb' Warning(linux-2.6.28-git3//fs/inode.c:588): No description found for parameter 'inode' Signed-off-by:
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Geert Uytterhoeven authored
commit 8308c54d ("generic: redefine resource_size_t as phys_addr_t") made CONFIG_RESOURCES_64BIT obsolete, but didn't remove it. Remove it. Signed-off-by:
Geert Uytterhoeven <geert@linux-m68k.org> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by:
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Tetsuo Handa authored
do_coredump() accesses helper_argv[0] without checking helper_argv != NULL. This can happen if page allocation failed. Signed-off-by:
Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by:
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KOSAKI Motohiro authored
Currently, kernel/profile.c include <asm/ptrace.h> twice. It can be removed. Signed-off-by:
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by:
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Jan Beulich authored
Signed-off-by:
Jan Beulich <jbeulich@novell.com> Signed-off-by:
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Gerd Hoffmann authored
Signed-off-by:
Gerd Hoffmann <kraxel@redhat.com> Cc: Jay Lan <jlan@engr.sgi.com> Cc: Balbir Singh <balbir@in.ibm.com> Signed-off-by:
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Cyrill Gorcunov authored
It's possible to register a chrdev with a name size exactly the same as was allocated in structure. It seems it was not intended behaviour. At least chrdev_show does not like it. Signed-off-by:
Cyrill Gorcunov <gorcunov@gmail.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
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Russell King authored
While looking at reducing the amount of architecture namespace pollution in the generic kernel, I found that asm/irq.h is included in the vast majority of compilations on ARM (around 650 files.) Since asm/irq.h includes a sub-architecture include file on ARM, this causes a negative impact on the ccache's ability to re-use the build results from other sub-architectures, so we have a desire to reduce the dependencies on asm/irq.h. It turns out that a major cause of this is the needless include of linux/hardirq.h into asm-generic/local.h. The patch below removes this include, resulting in some 250 to 300 files (around half) of the kernel then omitting asm/irq.h. My test builds still succeed, provided two ARM files are fixed (arch/arm/kernel/traps.c and arch/arm/mm/fault.c) - so there may be negative impacts for this on other architectures. Note that x86 does not include asm/irq.h nor linux/hardirq.h in its asm/local.h, so this patch can be viewed as bringing the generic version into line with the x86 version. [kosaki.motohiro@jp.fujitsu.com: add #include <linux/irqflags.h> to acpi/processor_idle.c] [adobriyan@gmail.com: fix sparc64] Signed-off-by:
Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by:
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Brent Casavant authored
Modify ioc4 to always load the sgiioc4 IDE module if the board carrying the IOC4 hardware actually implements the IDE interface (not all boards bring this functionality off the IOC4 chip). A drive hosted on the IDE interface may contain the root filesystem, and sgiioc4 doesn't load automatically as ioc4 owns the PCI device ID, not sgiioc4. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by:
Michael Reed <mdr@sgi.com> Signed-off-by:
Brent Casavant <bcasavan@sgi.com> Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by:
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Dmitry Eremin-Solenikov authored
My surname has changed due to marriage. Change MAINTAINERS entry and add .mailmap entry to reflect that. Signed-off-by:
Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by:
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Eric Dumazet authored
For NR_CPUS >= 16 values, FBC_BATCH is 2*NR_CPUS Considering more and more distros are using high NR_CPUS values, it makes sense to use a more sensible value for FBC_BATCH, and get rid of NR_CPUS. A sensible value is 2*num_online_cpus(), with a minimum value of 32 (This minimum value helps branch prediction in __percpu_counter_add()) We already have a hotcpu notifier, so we can adjust FBC_BATCH dynamically. We rename FBC_BATCH to percpu_counter_batch since its not a constant anymore. Signed-off-by:
Eric Dumazet <dada1@cosmosbay.com> Acked-by:
David S. Miller <davem@davemloft.net> Acked-by:
Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by:
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Paul Mackerras authored
At the moment, the times() system call will appear to fail for a period shortly after boot, while the value it want to return is between -4095 and -1. The same thing will also happen for the time() system call on 32-bit platforms some time in 2106 or so. On some platforms, such as x86, this is unavoidable because of the system call ABI, but other platforms such as powerpc have a separate error indication from the return value, so system calls can in fact return small negative values without indicating an error. On those platforms, force_successful_syscall_return() provides a way to indicate that the system call return value should not be treated as an error even if it is in the range which would normally be taken as a negative error number. This adds a force_successful_syscall_return() call to the time() and times() system calls plus their 32-bit compat versions, so that they don't erroneously indicate an error on those platforms whose system call ABI has a separate error indication. This will not affect anything on other platforms. Joakim Tjernlund added the fix for time() and the compat versions of time() and times(), after I did the fix for times(). Signed-off-by:
Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Signed-off-by:
Paul Mackerras <paulus@samba.org> Acked-by:
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David Brownell authored
Provide some basic advice about when to use BUG()/BUG_ON(): never, unless there's really no better option. This matches my understanding of the standard policy ... which seems not to be written down so far, outside of LKML messages that I haven't bookmarked. Signed-off-by:
David Brownell <dbrownell@users.sourceforge.net> Cc: Hans Verkuil <hverkuil@xs4all.nl> Cc: Ingo Molnar <mingo@elte.hu> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by:
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Tejun Heo authored
f_op->poll is the only vfs operation which is not allowed to sleep. It's because poll and select implementation used task state to synchronize against wake ups, which doesn't have to be the case anymore as wait/wake interface can now use custom wake up functions. The non-sleep restriction can be a bit tricky because ->poll is not called from an atomic context and the result of accidentally sleeping in ->poll only shows up as temporary busy looping when the timing is right or rather wrong. This patch converts poll/select to use custom wake up function and use separate triggered variable to synchronize against wake up events. The only added overhead is an extra function call during wake up and negligible. This patch removes the one non-sleep exception from vfs locking rules and is beneficial to userland filesystem implementations like FUSE, 9p or peculiar fs like spufs as it's very difficult for those to implement non-sleeping poll method. While at it, make the following cosmetic changes to make poll.h and select.c checkpatch friendly. * s/type * symbol/type *symbol/ : three places in poll.h * remove blank line before EXPORT_SYMBOL() : two places in select.c Oleg: spotted missing barrier in poll_schedule_timeout() Davide: spotted missing write barrier in pollwake() Signed-off-by:
Tejun Heo <tj@kernel.org> Cc: Eric Van Hensbergen <ericvh@gmail.com> Cc: Ron Minnich <rminnich@sandia.gov> Cc: Ingo Molnar <mingo@elte.hu> Cc: Christoph Hellwig <hch@infradead.org> Signed-off-by:
Miklos Szeredi <mszeredi@suse.cz> Cc: Davide Libenzi <davidel@xmailserver.org> Cc: Brad Boyer <flar@allandria.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Roland McGrath <roland@redhat.com> Cc: Mauro Carvalho Chehab <mchehab@infradead.org> Signed-off-by:
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Randy Dunlap authored
Have one option to control Miscellaneous filesystems. This makes it easy to disable all of them at one time. Signed-off-by:
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Arjan van de Ven authored
We're struggling all the time to figure out where the code came from that oopsed.. The script below (a adaption from a script used by kerneloops.org) can help developers quite a bit, at least for non-module cases. It works and looks like this: [/home/arjan/linux]$ dmesg | perl scripts/markup_oops.pl vmlinux { struct agp_memory *memory; memory = agp_allocate_memory(agp_bridge, pg_count, type); c055c10f: 89 c2 mov %eax,%edx if (memory == NULL) c055c111: 74 19 je c055c12c <agp_allocate_memory_wrap+0x30> /* This function must only be called when current_controller != NULL */ static void agp_insert_into_pool(struct agp_memory * temp) { struct agp_memory *prev; prev = agp_fe.current_controller->pool; c055c113: a1 ec dc 8f c0 mov 0xc08fdcec,%eax *c055c118: 8b 40 10 mov 0x10(%eax),%eax <----- faulting instruction if (prev != NULL) { c055c11b: 85 c0 test %eax,%eax c055c11d: 74 05 je c055c124 <agp_allocate_memory_wrap+0x28> prev->prev = temp; c055c11f: 89 50 04 mov %edx,0x4(%eax) temp->next = prev; c055c122: 89 02 mov %eax,(%edx) } agp_fe.current_controller->pool = temp; c055c124: a1 ec dc 8f c0 mov 0xc08fdcec,%eax c055c129: 89 50 10 mov %edx,0x10(%eax) if (memory == NULL) return NULL; agp_insert_into_pool(memory); so in this case, we faulted while dereferencing agp_fe.current_controller pointer, and we get to see exactly which function and line it affects... Personally I find this very useful, and I can see value for having this script in the kernel for more-than-just-me to use. Caveats: * It only works for oopses not-in-modules * It only works nicely for kernels compiled with CONFIG_DEBUG_INFO * It's not very fast. * It only works on x86 Signed-off-by:Arjan van de Ven <arjan@linux.intel.com> Signed-off-by:
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Arjan van de Ven authored
... because we do want repeated same-oops to be seen by automated tools like kerneloops.org Signed-off-by:
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Pavel Machek authored
It decodes "\n" as 0, which is bad, because stray echo into backlight will turn your backlight off, etc... Signed-off-by:
Pavel Machek <pavel@suse.cz> Cc: Yi Yang <yi.y.yang@intel.com> Signed-off-by:
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Mike Frysinger authored
The function autodetect_raid is only used by __init functions, and it refers to __initdata, so it needs __init markings. Fixes this error: The function autodetect_raid() references the variable __initdata raid_noautodetect. This is often because autodetect_raid lacks a __initdata annotation or the annotation of raid_noautodetect is wrong. Signed-off-by:
Mike Frysinger <vapier@gentoo.org> Signed-off-by:
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Qinghuang Feng authored
None of these (init|exit) functions is called from other functions which is outside the kernel module mechanism or kernel itself, so mark them as {static|__init|__exit}. Signed-off-by:Qinghuang Feng <qhfeng.kernel@gmail.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Acked-by:
Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by:
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Darrick J. Wong authored
Create a helper macro to divide two numbers and round the result to the nearest whole number. This is a helper macro for hwmon drivers that want to convert incoming sysfs values per standard hwmon practice, though the macro itself can be used by anyone. Signed-off-by:
Darrick J. Wong <djwong@us.ibm.com> Signed-off-by:
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Harvey Harrison authored
Suppresses sparse warning: lib/proportions.c:159:16: warning: context imbalance in 'prop_get_global': wrong count at exit lib/proportions.c:159:16: context 'RCU': wanted 0, got 1 lib/proportions.c:164:2: warning: context imbalance in 'prop_put_global': unexpected unlock lib/proportions.c:164:2: context 'RCU': wanted 0, got -1 Signed-off-by:
Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by:
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Harvey Harrison authored
radix_tree_preloads is unused outside of this file, make it static. Noticed by sparse: lib/radix-tree.c:84:1: warning: symbol 'per_cpu__radix_tree_preloads' was not declared. Should it be static? Signed-off-by:
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Harvey Harrison authored
pos is always set before being used, no need to declare a second one inside the if() block. lib/prio_heap.c:34:7: warning: symbol 'pos' shadows an earlier one lib/prio_heap.c:30:6: originally declared here Signed-off-by:
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Zhaolei authored
Check CLONE_SIGHAND only is enough, because combination of CLONE_THREAD and CLONE_SIGHAND is already done in copy_process(). Impact: cleanup, no functionality changed Signed-off-by:
Zhao Lei <zhaolei@cn.fujitsu.com> Cc: Roland McGrath <roland@redhat.com> Cc: Oleg Nesterov <oleg@redhat.com> Signed-off-by:
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Alexey Dobriyan authored
Signed-off-by:
Alexey Dobriyan <adobriyan@gmail.com> Cc: Gabor Gombas <gombasg@sztaki.hu> Cc: Jan Beulich <jbeulich@novell.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Ingo Molnar <mingo@elte.hu>, Signed-off-by:
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Luiz Fernando N. Capitulino authored
Untangle the error unwinding in this function, saving a test of local variable `vma'. Signed-off-by:
Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br> Signed-off-by:
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Marton Balint authored
In the past, I used the root=... command line parameter to specify the root filesystem to the kernel. Now it seems that specifying it is not necessary. The kernel detects the root filesystem even if the kernel command line is empty. My root fs is on a raid1 device by the way, and I am not using initrd for the boot process. If the kernel detects the root filesystem somehow, I think it should print out the result of this detection, otherwise I will not know which device has the root filesystem. Or is there an easy way to get this information on a running system? I had a quick look at the /proc and /sys filesystems, but haven't found anything useful there. Signed-off-by:
Marton Balint <cus@fazekas.hu> Cc: Christoph Hellwig <hch@lst.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
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Viktor Rosendahl authored
This used to work unpatched with older kernels, during the development phase of mtdoops. Before commit e3e8a75d a space was printed with console_loglevel set to 15, which probably flushed the oops message as a side effect. This is another patch from the Nokia N810 kernel. Signed-off-by:
Viktor Rosendahl <viktor.rosendahl@nokia.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Woodhouse <dwmw2@infradead.org> Signed-off-by:
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Laurent Pinchart authored
Several subsystem open handlers dereference the fops_get() return value without checking it for nullness. This opens a race condition between the open handler and module unloading. A module can be marked as being unloaded (MODULE_STATE_GOING) before its exit function is called and gets the chance to unregister the driver. During that window open handlers can still be called, and fops_get() will fail in try_module_get() and return a NULL pointer. This change checks the fops_get() return value and returns -ENODEV if NULL. Reported-by:
Alan Jenkins <alan-jenkins@tuffmail.co.uk> Signed-off-by:
Laurent Pinchart <laurent.pinchart@skynet.be> Acked-by:
Takashi Iwai <tiwai@suse.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Dave Airlie <airlied@linux.ie> Acked-by:
Mauro Carvalho Chehab <mchehab@infradead.org> Signed-off-by:
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Arjan van de Ven authored
Use the newly introduced pci_ioremap_bar() function in drivers/misc. pci_ioremap_bar() just takes a pci device and a bar number, with the goal of making it really hard to get wrong, while also having a central place to stick sanity checks. Signed-off-by:
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Matthew Wilcox authored
The atomic_t type cannot currently be used in some header files because it would create an include loop with asm/atomic.h. Move the type definition to linux/types.h to break the loop. Signed-off-by:
Matthew Wilcox <willy@linux.intel.com> Cc: Huang Ying <ying.huang@intel.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by:
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Rakib Mullick authored
checkpatch warns about 'static void noinline'. It wants `static noinline void'. Both are permissible, but the kernel consistently uses `static inline' and `static noinline', and consistency is good. Hence let's keep the checkpatch warning and fix up this code site. [akpm@linux-foundation.org: rewrote changelog] Signed-off-by:
Md.Rakib H. Mullick <rakib.mullick@gmail.com> Signed-off-by:
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Cyrill Gorcunov authored
At this point we already know that 'addr' is not NULL so get rid of redundant 'if'. Probably gcc eliminate it by optimization pass. [akpm@linux-foundation.org: use __weak, too] Signed-off-by:
Cyrill Gorcunov <gorcunov@openvz.org> Reviewed-by:
Ingo Molnar <mingo@elte.hu> Signed-off-by:
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KOSAKI Motohiro authored
Wassim Dagash reported following kswapd infinite loop problem. kswapd runs in some infinite loop trying to swap until order 10 of zone highmem is OK.... kswapd will continue to try to balance order 10 of zone highmem forever (or until someone release a very large chunk of highmem). For non order-0 allocations, the system may never be balanced due to fragmentation but kswapd should not infinitely loop as a result. Instead, recheck all watermarks at order-0 as they are the most important. If watermarks are ok, kswapd will go back to sleep. [akpm@linux-foundation.org: fix comment] Reported-by:
wassim dagash <wassim.dagash@gmail.com> Signed-off-by:
Nick Piggin <npiggin@suse.de> Signed-off-by:
Mel Gorman <mel@csn.ul.ie> Signed-off-by:
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Johannes Weiner authored
Moving the request details print-out before the sanity checks that might panic() enables us to analyse invalid requests without having access to the line information of the stack dump. Signed-off-by:
Johannes Weiner <hannes@cmpxchg.org> Signed-off-by:
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Johannes Weiner authored
When dup_mmap() ooms we can end up with mm->mmap == NULL. The error path does mmput() and unmap_vmas() gets a NULL vma which it dereferences. In exit_mmap() there is nothing to do at all for this case, we can cancel the callpath right there. [akpm@linux-foundation.org: add sorely-needed comment] Signed-off-by:
Akinobu Mita <akinobu.mita@gmail.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Hugh Dickins <hugh@veritas.com> Signed-off-by:
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KOSAKI Motohiro authored
page_queue_congested() was introduced in 2002, but it was never used Signed-off-by:
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