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2012-05-22md/bitmap: allow a bitmap with no backing storage.NeilBrown
An md bitmap comprises two parts - internal counting of active writes per 'chunk'. - external storage of whether there are any active writes on each chunk The second requires the first, but the first doesn't require the second. Not having backing storage means that the bitmap cannot expedite resync after a crash, but it still allows us to expedite the recovery of a recently-removed device. So: allow a bitmap to exist even if there is no backing device. In that case we default to 128M chunks. A particular value of this is that we can remove and re-add a bitmap (possibly of a different granularity) on a degraded array, and not lose the information needed to fast-recover the missing device. We don't actually activate these bitmaps yet - that will come in a later patch. Signed-off-by: NeilBrown <neilb@suse.de>
2012-05-22md/bitmap: add new 'space' attribute for bitmaps.NeilBrown
If we are to allow bitmaps to be resized when the array is resized, we need to know how much space there is. So create an attribute to store this information and set appropriate defaults. It can be set more precisely via sysfs, or future metadata extensions may allow it to be recorded. Signed-off-by: NeilBrown <neilb@suse.de>
2012-05-22md/bitmap: disentangle two different 'pending' flags.NeilBrown
There are two different 'pending' concepts in the handling of the write intent bitmap. Firstly, a 'page' from the bitmap (which container PAGE_SIZE*8 bits) may have changes (bits cleared) that should be written in due course. There is no hurry for these and the page will transition from PENDING to NEEDWRITE and will then be written, though if it ever becomes DIRTY it will be written much sooner and PENDING will be cleared. Secondly, a page of counters - which contains PAGE_SIZE/2 counters, one for each bit, can usefully have a 'pending' flag which indicates if any of the counters are low (2 or 1) and ready to be processed by bitmap_daemon_work(). If this flag is clear we can skip the whole page. These two concepts are currently combined in the bitmap-file flag. This causes a tighter connection between the counters and the bitmap file than I would like - as I want to add some flexibility to the bitmap file. So introduce a new flag with the page-of-counters, and rewrite bitmap_daemon_work() so that it handles the two different 'pending' concepts separately. This also allows us to clear BITMAP_PAGE_PENDING when we write out a dirty page, which may occasionally reduce the number of times we write a page. Signed-off-by: NeilBrown <neilb@suse.de>
2012-05-22raid5: support sync requestShaohua Li
REQ_SYNC is ignored in current raid5 code. Block layer does use it to do policy, for example ioscheduler. This patch adds it. Signed-off-by: Shaohua Li <shli@fusionio.com> Signed-off-by: NeilBrown <neilb@suse.de>
2012-05-22raid5: remove unused variablesShaohua Li
The two variables are useless. Signed-off-by: Shaohua Li <shli@fusionio.com> Signed-off-by: NeilBrown <neilb@suse.de>
2012-05-22md/raid10: Fix memleak in r10buf_pool_allocmajianpeng
If the allocation of rep1_bio fails, we currently don't free the 'bio' of the same dev. Reported by kmemleak. Signed-off-by: majianpeng <majianpeng@gmail.com> Signed-off-by: NeilBrown <neilb@suse.de>
2012-05-22md/raid1: allow fix_read_error to read from recovering device.majianpeng
When attempting to fix a read error, it is acceptable to read from a device that is recovering, provided the recovery has got past the place we are reading from. This makes the test for "can we read from here" the same as the test in read_balance. Signed-off-by: majianpeng <majianpeng@gmail.com> Signed-off-by: NeilBrown <neilb@suse.de>
2012-05-22md: move freeing of badblocks.page into md_rdev_clearNeilBrown
This ensures that it is always freed - there were case where we failed to free the page. Reported-by: majianpeng <majianpeng@gmail.com> Signed-off-by: NeilBrown <neilb@suse.de>
2012-05-22md: dm-raid should call helper function to clear rdev.NeilBrown
dm-raid currently open-codes the freeing of some members of and rdev. It is more maintainable to have it call common code from md.c which does this for all call-sites. So remove free_disk_sb to md_rdev_clear, export it, and use it in dm-raid.c Signed-off-by: NeilBrown <neilb@suse.de>
2012-05-22lib/raid6: cleanup gen_syndrome function selectionJim Kukunas
Reorders functions in raid6_algos as well as the preference check to reduce the number of functions tested on initialization. Also, creates symmetry between choosing the gen_syndrome functions and choosing the recovery functions. Signed-off-by: Jim Kukunas <james.t.kukunas@linux.intel.com> Signed-off-by: NeilBrown <neilb@suse.de>
2012-05-22lib/raid6: update test program for recovery functionsJim Kukunas
Test each combination of recovery and syndrome generation functions. Signed-off-by: Jim Kukunas <james.t.kukunas@linux.intel.com> Signed-off-by: NeilBrown <neilb@suse.de>
2012-05-22lib/raid6: Add SSSE3 optimized recovery functionsJim Kukunas
Add SSSE3 optimized recovery functions, as well as a system for selecting the most appropriate recovery functions to use. Originally-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Jim Kukunas <james.t.kukunas@linux.intel.com> Signed-off-by: NeilBrown <neilb@suse.de>
2012-05-22lib/raid6: fix test program buildJim Kukunas
<linux/module.h> drags in headers which are not visible to userspace, thus breaking the build for the test program. Signed-off-by: Jim Kukunas <james.t.kukunas@linux.intel.com> Signed-off-by: NeilBrown <neilb@suse.de>
2012-05-22raid5: add AVX optimized RAID5 checksummingJim Kukunas
Optimize RAID5 xor checksumming by taking advantage of 256-bit YMM registers introduced in AVX. Signed-off-by: Jim Kukunas <james.t.kukunas@linux.intel.com> Signed-off-by: NeilBrown <neilb@suse.de>
2012-05-22crypto: disable preemption while benchmarking RAID5 xor checksummingJim Kukunas
With CONFIG_PREEMPT=y, we need to disable preemption while benchmarking RAID5 xor checksumming to ensure we're actually measuring what we think we're measuring. Signed-off-by: Jim Kukunas <james.t.kukunas@linux.intel.com> Signed-off-by: NeilBrown <neilb@suse.de>
2012-05-22crypto: wait for a full jiffy in do_xor_speedJim Kukunas
In the existing do_xor_speed(), there is no guarantee that we actually run do_2() for a full jiffy. We get the current jiffy, then run do_2() until the next jiffy. Instead, let's get the current jiffy, then wait until the next jiffy to start our test. Signed-off-by: Jim Kukunas <james.t.kukunas@linux.intel.com> Signed-off-by: NeilBrown <neilb@suse.de>
2012-05-22md/raid10: add reshape supportNeilBrown
A 'near' or 'offset' lay RAID10 array can be reshaped to a different 'near' or 'offset' layout, a different chunk size, and a different number of devices. However the number of copies cannot change. Unlike RAID5/6, we do not support having user-space backup data that is being relocated during a 'critical section'. Rather, the data_offset of each device must change so that when writing any block to a new location, it will not over-write any data that is still 'live'. This means that RAID10 reshape is not supportable on v0.90 metadata. The different between the old data_offset and the new_offset must be at least the larger of the chunksize multiplied by offset copies of each of the old and new layout. (for 'near' mode, offset_copies == 1). A larger difference of around 64M seems useful for in-place reshapes as more data can be moved between metadata updates. Very large differences (e.g. 512M) seem to slow the process down due to lots of long seeks (on oldish consumer graded devices at least). Metadata needs to be updated whenever the place we are about to write to is considered - by the current metadata - to still contain data in the old layout. [unbalanced locking fix from Dan Carpenter <dan.carpenter@oracle.com>] Signed-off-by: NeilBrown <neilb@suse.de>
2012-05-21avr32: ->restart_block.fn needs to be reset on rt_sigreturnAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21xtensa: ->restart_block.fn needs to be reset on rt_sigreturnAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21score: ->restart_block.fn needs to be reset on rt_sigreturnAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21microblaze: ->restart_block.fn needs to be reset on rt_sigreturnAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21hexagon: ->restart_block.fn needs to be reset on rt_sigreturnAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21c6x: ->restart_block.fn needs to be reset on rt_sigreturnAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21parisc: resetting ->restart_block.fn needs to be done on rt_sigreturn()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21m68k: use set_current_blocked() and block_sigmask()Matt Fleming
As described in e6fa16ab ("signal: sigprocmask() should do retarget_shared_pending()") the modification of current->blocked is incorrect as we need to check whether the signal we're about to block is pending in the shared queue. Also, use the new helper function introduced in commit 5e6292c0f28f ("signal: add block_sigmask() for adding sigmask to current->blocked") which centralises the code for updating current->blocked after successfully delivering a signal and reduces the amount of duplicate code across architectures. In the past some architectures got this code wrong, so using this helper function should stop that from happening again. Acked-by: Oleg Nesterov <oleg@redhat.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21hexagon: do_notify_resume() needs tracehook_notify_resume()Oleg Nesterov
arch/hexagon/kernel/signal.c:do_notify_resume() forgets to call tracehook_notify_resume() if TIF_NOTIFY_RESUME is set. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Richard Kuo <rkuo@codeaurora.org> Cc: David Howells <dhowells@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Alexander Gordeev <agordeev@redhat.com> Cc: Chris Zankel <chris@zankel.net> Cc: David Smith <dsmith@redhat.com> Cc: "Frank Ch. Eigler" <fche@redhat.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Larry Woodman <lwoodman@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Tejun Heo <tj@kernel.org> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21avr32: use block_sigmask()Matt Fleming
Use the new helper function introduced in commit 5e6292c0f28f ("signal: add block_sigmask() for adding sigmask to current->blocked") which centralises the code for updating current->blocked after successfully delivering a signal and reduces the amount of duplicate code across architectures. In the past some architectures got this code wrong, so using this helper function should stop that from happening again. Acked-by: Oleg Nesterov <oleg@redhat.com> Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no> Cc: Havard Skinnemoen <hskinnemoen@gmail.com> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21avr32: use set_current_blocked() in handle_signal/sys_rt_sigreturnOleg Nesterov
It is wrong to change ->blocked directly, see e6fa16ab. Change handle_signal() and sys_rt_sigreturn() to use the right helper, set_current_blocked(). Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no> Acked-by: Havard Skinnemoen <hskinnemoen@gmail.com> Reviewed-by: Matt Fleming <matt.fleming@intel.com> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21avr32: don't mask signals in the error pathMatt Fleming
The current handle_signal() implementation is broken - it will mask signals if we fail to setup the signal stack frame, which isn't the desired behaviour, we should only be masking signals if we succeed in setting up the stack frame. It looks like this code was copied from the old (broken) arm implementation but wasn't updated when the arm code was fixed in commit a6c61e9dfdd0 ("[ARM] 3168/1: Update ARM signal delivery and masking"). Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no> Acked-by: Havard Skinnemoen <hskinnemoen@gmail.com> Acked-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21m32r: use set_current_blocked() and block_sigmask()Matt Fleming
As described in e6fa16ab ("signal: sigprocmask() should do retarget_shared_pending()") the modification of current->blocked is incorrect as we need to check whether the signal we're about to block is pending in the shared queue. Also, use the new helper function introduced in commit 5e6292c0f28f ("signal: add block_sigmask() for adding sigmask to current->blocked") which centralises the code for updating current->blocked after successfully delivering a signal and reduces the amount of duplicate code across architectures. In the past some architectures got this code wrong, so using this helper function should stop that from happening again. Acked-by: Oleg Nesterov <oleg@redhat.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Kyle McMartin <kyle@redhat.com> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21mn10300: use set_current_blocked() and block_sigmask()Matt Fleming
As described in e6fa16ab ("signal: sigprocmask() should do retarget_shared_pending()") the modification of current->blocked is incorrect as we need to check whether the signal we're about to block is pending in the shared queue. Also, use the new helper function introduced in commit 5e6292c0f28f ("signal: add block_sigmask() for adding sigmask to current->blocked") which centralises the code for updating current->blocked after successfully delivering a signal and reduces the amount of duplicate code across architectures. In the past some architectures got this code wrong, so using this helper function should stop that from happening again. Acked-by: Oleg Nesterov <oleg@redhat.com> Acked-by: David Howells <dhowells@redhat.com> Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21cris: use set_current_blocked() and block_sigmask()Matt Fleming
As described in e6fa16ab ("signal: sigprocmask() should do retarget_shared_pending()") the modification of current->blocked is incorrect as we need to check whether the signal we're about to block is pending in the shared queue. Also, use the new helper function introduced in commit 5e6292c0f28f ("signal: add block_sigmask() for adding sigmask to current->blocked") which centralises the code for updating current->blocked after successfully delivering a signal and reduces the amount of duplicate code across architectures. In the past some architectures got this code wrong, so using this helper function should stop that from happening again. Acked-by: Oleg Nesterov <oleg@redhat.com> Cc: Mikael Starvik <starvik@axis.com> Acked-by: Jesper Nilsson <jesper.nilsson@axis.com> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21ia64: use set_current_blocked() and block_sigmask()Matt Fleming
As described in e6fa16ab ("signal: sigprocmask() should do retarget_shared_pending()") the modification of current->blocked is incorrect as we need to check whether the signal we're about to block is pending in the shared queue. Also, use the new helper function introduced in commit 5e6292c0f28f ("signal: add block_sigmask() for adding sigmask to current->blocked") which centralises the code for updating current->blocked after successfully delivering a signal and reduces the amount of duplicate code across architectures. In the past some architectures got this code wrong, so using this helper function should stop that from happening again. Acked-by: Oleg Nesterov <oleg@redhat.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21microblaze: use set_current_blocked() and block_sigmask()Matt Fleming
As described in e6fa16ab ("signal: sigprocmask() should do retarget_shared_pending()") the modification of current->blocked is incorrect as we need to check whether the signal we're about to block is pending in the shared queue. Also, use the new helper function introduced in commit 5e6292c0f28f ("signal: add block_sigmask() for adding sigmask to current->blocked") which centralises the code for updating current->blocked after successfully delivering a signal and reduces the amount of duplicate code across architectures. In the past some architectures got this code wrong, so using this helper function should stop that from happening again. Acked-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Michal Simek <monstr@monstr.eu> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21microblaze: fix signal maskingMatt Fleming
There are a couple of problems with the current signal code, 1. If we failed to setup the signal stack frame then we should not be masking any signals. 2. ka->sa.sa_mask is only added to the current blocked signals list if SA_NODEFER is set in ka->sa.sa_flags. If we successfully setup the signal frame and are going to run the handler then we must honour sa_mask. Acked-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Michal Simek <monstr@monstr.eu> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21microblaze: no need to reset handler if SA_ONESHOTMatt Fleming
get_signal_to_deliver() already resets the signal handler if SA_ONESHOT is set in ka->sa.sa_flags, there's no need to do it again in handle_signal(). Furthermore, because we were modifying ka->sa.sa_handler (which is a copy of sighand->action[]) instead of sighand->action[] the original code actually had no effect on signal delivery. Acked-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Michal Simek <monstr@monstr.eu> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21microblaze: don't reimplement force_sigsegv()Matt Fleming
Instead of open coding the sequence from force_sigsegv() just call it. This also fixes a bug because we were modifying ka->sa.sa_handler (which is a copy of sighand->action[]), whereas the intention of the code was to modify sighand->action[] directly. As the original code was working with a copy it had no effect on signal delivery. Acked-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Michal Simek <monstr@monstr.eu> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21score: use set_current_blocked() and block_sigmask()Matt Fleming
As described in e6fa16ab ("signal: sigprocmask() should do retarget_shared_pending()") the modification of current->blocked is incorrect as we need to check whether the signal we're about to block is pending in the shared queue. Also, use the new helper function introduced in commit 5e6292c0f28f ("signal: add block_sigmask() for adding sigmask to current->blocked") which centralises the code for updating current->blocked after successfully delivering a signal and reduces the amount of duplicate code across architectures. In the past some architectures got this code wrong, so using this helper function should stop that from happening again. Acked-by: Oleg Nesterov <oleg@redhat.com> Cc: Chen Liqin <liqin.chen@sunplusct.com> Cc: Lennox Wu <lennox.wu@gmail.com> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21score: don't mask signals if we fail to setup signal stackMatt Fleming
If setup_rt_frame() returns -EFAULT then we must not block any signals in the current process. Acked-by: Oleg Nesterov <oleg@redhat.com> Cc: Chen Liqin <liqin.chen@sunplusct.com> Cc: Lennox Wu <lennox.wu@gmail.com> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21h8300: use set_current_blocked() and block_sigmask()Matt Fleming
As described in e6fa16ab ("signal: sigprocmask() should do retarget_shared_pending()") the modification of current->blocked is incorrect as we need to check whether the signal we're about to block is pending in the shared queue. Also, use the new helper function introduced in commit 5e6292c0f28f ("signal: add block_sigmask() for adding sigmask to current->blocked") which centralises the code for updating current->blocked after successfully delivering a signal and reduces the amount of duplicate code across architectures. In the past some architectures got this code wrong, so using this helper function should stop that from happening again. Acked-by: Oleg Nesterov <oleg@redhat.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21unicore32: use block_sigmask()Matt Fleming
Use the new helper function introduced in commit 5e6292c0f28f ("signal: add block_sigmask() for adding sigmask to current->blocked") which centralises the code for updating current->blocked after successfully delivering a signal and reduces the amount of duplicate code across architectures. In the past some architectures got this code wrong, so using this helper function should stop that from happening again. Acked-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Guan Xuetao <gxt@mprc.pku.edu.cn> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21blackfin: use set_current_blocked() and block_sigmask()Matt Fleming
As described in e6fa16ab ("signal: sigprocmask() should do retarget_shared_pending()") the modification of current->blocked is incorrect as we need to check whether the signal we're about to block is pending in the shared queue. Also, use the new helper function introduced in commit 5e6292c0f28f ("signal: add block_sigmask() for adding sigmask to current->blocked") which centralises the code for updating current->blocked after successfully delivering a signal and reduces the amount of duplicate code across architectures. In the past some architectures got this code wrong, so using this helper function should stop that from happening again. Acked-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Acked-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21frv: use set_current_blocked() and block_sigmask()Matt Fleming
As described in e6fa16ab ("signal: sigprocmask() should do retarget_shared_pending()") the modification of current->blocked is incorrect as we need to check whether the signal we're about to block is pending in the shared queue. Also, use the new helper function introduced in commit 5e6292c0f28f ("signal: add block_sigmask() for adding sigmask to current->blocked") which centralises the code for updating current->blocked after successfully delivering a signal and reduces the amount of duplicate code across architectures. In the past some architectures got this code wrong, so using this helper function should stop that from happening again. Acked-by: Oleg Nesterov <oleg@redhat.com> Acked-by: David Howells <dhowells@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21parisc: use set_current_blocked() and block_sigmask()Matt Fleming
As described in e6fa16ab ("signal: sigprocmask() should do retarget_shared_pending()") the modification of current->blocked is incorrect as we need to check whether the signal we're about to block is pending in the shared queue. Also, use the new helper function introduced in commit 5e6292c0f28f ("signal: add block_sigmask() for adding sigmask to current->blocked") which centralises the code for updating current->blocked after successfully delivering a signal and reduces the amount of duplicate code across architectures. In the past some architectures got this code wrong, so using this helper function should stop that from happening again. Acked-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Kyle McMartin <kyle@mcmartin.ca> Cc: Helge Deller <deller@gmx.de> Cc: "James E.J. Bottomley" <jejb@parisc-linux.org> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21new helper: sigsuspend()Al Viro
guts of saved_sigmask-based sigsuspend/rt_sigsuspend. Takes kernel sigset_t *. Open-coded instances replaced with calling it. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21Merge branch 'irq-core-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull core irq changes from Ingo Molnar: "A collection of small fixes." By Thomas Gleixner * 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: hexagon: Remove select of not longer existing Kconfig switches arm: Select core options instead of redefining them genirq: Do not consider disabled wakeup irqs genirq: Allow check_wakeup_irqs to notice level-triggered interrupts genirq: Be more informative on irq type mismatch genirq: Reject bogus threaded irq requests genirq: Streamline irq_action
2012-05-21Merge branch 'next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security Pull security subsystem updates from James Morris: "New notable features: - The seccomp work from Will Drewry - PR_{GET,SET}_NO_NEW_PRIVS from Andy Lutomirski - Longer security labels for Smack from Casey Schaufler - Additional ptrace restriction modes for Yama by Kees Cook" Fix up trivial context conflicts in arch/x86/Kconfig and include/linux/filter.h * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (65 commits) apparmor: fix long path failure due to disconnected path apparmor: fix profile lookup for unconfined ima: fix filename hint to reflect script interpreter name KEYS: Don't check for NULL key pointer in key_validate() Smack: allow for significantly longer Smack labels v4 gfp flags for security_inode_alloc()? Smack: recursive tramsmute Yama: replace capable() with ns_capable() TOMOYO: Accept manager programs which do not start with / . KEYS: Add invalidation support KEYS: Do LRU discard in full keyrings KEYS: Permit in-place link replacement in keyring list KEYS: Perform RCU synchronisation on keys prior to key destruction KEYS: Announce key type (un)registration KEYS: Reorganise keys Makefile KEYS: Move the key config into security/keys/Kconfig KEYS: Use the compat keyctl() syscall wrapper on Sparc64 for Sparc32 compat Yama: remove an unused variable samples/seccomp: fix dependencies on arch macros Yama: add additional ptrace scopes ...
2012-05-21Merge tag 'virtio-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus Pull virtio updates from Rusty Russell. * tag 'virtio-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus: virtio: fix typo in comment virtio-mmio: Devices parameter parsing virtio_blk: Drop unused request tracking list virtio-blk: Fix hot-unplug race in remove method virtio: Use ida to allocate virtio index virtio: balloon: separate out common code between remove and freeze functions virtio: balloon: drop restore_common() 9p: disconnect channel when PCI device is removed virtio: update documentation to v0.9.5 of spec
2012-05-22virtio: fix typo in commentChen Baozi
- Delete "@request_vqs" and "@free_vqs" comments, since they are no longer in struct virtio_config_ops. - According to the macro below, "@val" should be "@v". Signed-off-by: Chen Baozi <chenbaozi@gmail.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2012-05-22virtio-mmio: Devices parameter parsingPawel Moll
This patch adds an option to instantiate guest virtio-mmio devices basing on a kernel command line (or module) parameter, for example: virtio_mmio.devices=0x100@0x100b0000:48 Signed-off-by: Pawel Moll <pawel.moll@arm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>