- 24 Sep, 2009 1 commit
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Darren Hart authored
The memory barrier semantics of futex_wait_queue_me() are non-obvious. Add some commentary to try and clarify it. Signed-off-by:
Darren Hart <dvhltc@us.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Dinakar Guniguntala <dino@in.ibm.com> Cc: John Stultz <johnstul@us.ibm.com> LKML-Reference: <20090924185447.694.38948.stgit@Aeon> Signed-off-by:
Ingo Molnar <mingo@elte.hu>
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- 22 Sep, 2009 5 commits
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Darren Hart authored
PI futexes do not use the same plist_node_empty() test for wakeup. It was possible for the waiter (in futex_wait_requeue_pi()) to set TASK_INTERRUPTIBLE after the waker assigned the rtmutex to the waiter. The waiter would then note the plist was not empty and call schedule(). The task would not be found by any subsequeuent futex wakeups, resulting in a userspace hang. By moving the setting of TASK_INTERRUPTIBLE to before the call to queue_me(), the race with the waker is eliminated. Since we no longer call get_user() from within queue_me(), there is no need to delay the setting of TASK_INTERRUPTIBLE until after the call to queue_me(). The FUTEX_LOCK_PI operation is not affected as futex_lock_pi() relies entirely on the rtmutex code to handle schedule() and wakeup. The requeue PI code is affected because the waiter starts as a non-PI waiter and is woken on a PI futex. Remove the crusty old comment about holding spinlocks() across get_user() as we no longer do that. Correct the locking statement with a description of why the test is performed. Signed-off-by:
Darren Hart <dvhltc@us.ibm.com> Acked-by:
Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Dinakar Guniguntala <dino@in.ibm.com> Cc: John Stultz <johnstul@us.ibm.com> LKML-Reference: <20090922053038.8717.97838.stgit@Aeon> Signed-off-by:
Ingo Molnar <mingo@elte.hu>
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Darren Hart authored
Use kernel-doc format to describe struct futex_q. Correct the wakeup definition to eliminate the statement about waking the waiter between the plist_del() and the q->lock_ptr = 0. Note in the comment that PI futexes have a different definition of the woken state. Signed-off-by:
Darren Hart <dvhltc@us.ibm.com> Acked-by:
Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Dinakar Guniguntala <dino@in.ibm.com> Cc: John Stultz <johnstul@us.ibm.com> LKML-Reference: <20090922053029.8717.62798.stgit@Aeon> Signed-off-by:
Ingo Molnar <mingo@elte.hu>
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Darren Hart authored
Make the existing function kernel-doc consistent throughout futex.c, following Documentation/kernel-doc-nano-howto.txt as closely as possible. When unsure, at least be consistent within futex.c. Signed-off-by:
Darren Hart <dvhltc@us.ibm.com> Acked-by:
Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Dinakar Guniguntala <dino@in.ibm.com> Cc: John Stultz <johnstul@us.ibm.com> LKML-Reference: <20090922053022.8717.13339.stgit@Aeon> Signed-off-by:
Ingo Molnar <mingo@elte.hu>
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Darren Hart authored
The queue_me/unqueue_me commentary is oddly placed and out of date. Clean it up and correct the inaccurate bits. Signed-off-by:
Darren Hart <dvhltc@us.ibm.com> Acked-by:
Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Dinakar Guniguntala <dino@in.ibm.com> Cc: John Stultz <johnstul@us.ibm.com> LKML-Reference: <20090922053015.8717.71713.stgit@Aeon> Signed-off-by:
Ingo Molnar <mingo@elte.hu>
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Darren Hart authored
Correct various typos and formatting inconsistencies in the commentary of futex_wait_requeue_pi(). Signed-off-by:
Darren Hart <dvhltc@us.ibm.com> Acked-by:
Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Dinakar Guniguntala <dino@in.ibm.com> Cc: John Stultz <johnstul@us.ibm.com> LKML-Reference: <20090922052958.8717.21932.stgit@Aeon> Signed-off-by:
Ingo Molnar <mingo@elte.hu>
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- 21 Sep, 2009 23 commits
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Linus Torvalds authored
Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: rcu: Fix whitespace inconsistencies rcu: Fix thinko, actually initialize full tree rcu: Apply results of code inspection of kernel/rcutree_plugin.h rcu: Add WARN_ON_ONCE() consistency checks covering state transitions rcu: Fix synchronize_rcu() for TREE_PREEMPT_RCU rcu: Simplify rcu_read_unlock_special() quiescent-state accounting rcu: Add debug checks to TREE_PREEMPT_RCU for premature grace periods rcu: Kconfig help needs to say that TREE_PREEMPT_RCU scales down rcutorture: Occasionally delay readers enough to make RCU force_quiescent_state rcu: Initialize multi-level RCU grace periods holding locks rcu: Need to update rnp->gpnum if preemptable RCU is to be reliable
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Linus Torvalds authored
Merge branch 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: perf_counter, powerpc, sparc: Fix compilation after perf_counter_overflow() change perf_counter: x86: Fix PMU resource leak perf util: SVG performance improvements perf util: Make the timechart SVG width dynamic perf timechart: Show the duration of scheduler delays in the SVG perf timechart: Show the name of the waker/wakee in timechart
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Linus Torvalds authored
Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: sched: Simplify sys_sched_rr_get_interval() system call sched: Fix potential NULL derference of doms_cur sched: Fix raciness in runqueue_is_locked() sched: Re-add lost cpu_allowed check to sched_fair.c::select_task_rq_fair() sched: Remove unneeded indentation in sched_fair.c::place_entity()
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Linus Torvalds authored
Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: kernel/profile.c: Switch /proc/irq/prof_cpu_mask to seq_file tracing: Export trace_profile_buf symbols tracing/events: use list_for_entry_continue tracing: remove max_tracer_type_len function-graph: use ftrace_graph_funcs directly tracing: Remove markers tracing: Allocate the ftrace event profile buffer dynamically tracing: Factorize the events profile accounting
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Linus Torvalds authored
Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: Print the hypervisor returned tsc_khz during boot x86: Correct segment permission flags in 64-bit linker script x86: cpuinit-annotate SMP boot trampolines properly x86: Increase timeout for EHCI debug port reset completion in early printk x86: Fix uaccess_32.h typo x86: Trivial whitespace cleanups x86, apic: Fix missed handling of discrete apics x86/i386: Remove duplicated #include x86, mtrr: Convert loop to a while based construct, avoid naked semicolon Revert 'x86: Fix system crash when loading with "reservetop" parameter' x86, mce: Fix compile warning in case of CONFIG_SMP=n x86, apic: Use logical flat on intel with <= 8 logical cpus x86: SGI UV: Map MMIO-High memory range x86: SGI UV: Add volatile semantics to macros that access chipset registers x86: SGI UV: Fix IPI macros x86: apic: Convert BUG() to BUG_ON() x86: Remove final bits of CONFIG_X86_OLD_MCE
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git://git.kernel.dk/linux-2.6-blockLinus Torvalds authored
* 'writeback' of git://git.kernel.dk/linux-2.6-block: nfs: initialize the backing_dev_info when creating the server writeback: make balance_dirty_pages() gradually back more off writeback: don't use schedule_timeout() without setting runstate nfs: nfs_kill_super() should call bdi_unregister() after killing super
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git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6Linus Torvalds authored
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6: (222 commits) V4L/DVB (13033): pt1: Don't use a deprecated DMA_BIT_MASK macro V4L/DVB (13029): radio-si4713: remove #include <linux/version.h> V4L/DVB (13027): go7007: convert printks to v4l2_info V4L/DVB (13026): s2250-board: Implement brightness and contrast controls V4L/DVB (13025): s2250-board: Fix memory leaks V4L/DVB (13024): go7007: Implement vidioc_g_std and vidioc_querystd V4L/DVB (13023): go7007: Merge struct gofh and go declarations V4L/DVB (13022): go7007: Fix mpeg controls V4L/DVB (13021): go7007: Fix whitespace and line lengths V4L/DVB (13020): go7007: Updates to Kconfig and Makefile V4L/DVB (13019): video: initial support for ADV7180 V4L/DVB (13018): kzalloc failure ignored in au8522_probe() V4L/DVB (13017): gspca: kmalloc failure ignored in sd_start() V4L/DVB (13016): kmalloc failure ignored in lgdt3304_attach() and s921_attach() V4L/DVB (13015): kmalloc failure ignored in m920x_firmware_download() V4L/DVB (13014): Add support for Compro VideoMate E800 (DVB-T part only) V4L/DVB (13013): FM TX: si4713: Kconfig: Fixed two typos. V4L/DVB (13012): uvc: introduce missing kfree V4L/DVB (13011): Change tuner type of BeholdTV cards V4L/DVB (13009): gspca - stv06xx-hdcs: Reduce exposure range ...
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git://git.infradead.org/ubifs-2.6Linus Torvalds authored
* 'linux-next' of git://git.infradead.org/ubifs-2.6: UBIFS: fix debugging dump UBIFS: improve lprops dump UBIFS: various minor commentary fixes UBIFS: improve journal head debugging prints UBIFS: define journal head numbers in ubifs-media.h UBIFS: amend commentaries UBIFS: check ubifs_scan error codes better UBIFS: do not print scary error messages needlessly UBIFS: add inode size debugging check UBIFS: constify file and inode operations UBIFS: remove unneeded call from ubifs_sync_fs UBIFS: kill BKL UBIFS: remove unused functions UBIFS: suppress compilation warning
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git://git.infradead.org/ubi-2.6Linus Torvalds authored
* 'linux-next' of git://git.infradead.org/ubi-2.6: UBI: improve NOR flash erasure quirk UBI: introduce flash dump helper UBI: eliminate possible undefined behaviour UBI: print a warning if too many PEBs are corrupted UBI: amend NOR flash pre-erase quirk UBI: print a message if ECH is corrupted and VIDH is ok
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git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6Linus Torvalds authored
* 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: (133 commits) drm/vgaarb: add VGA arbitration support to the drm and kms. drm/radeon: some r420s have a CP race with the DMA engine. drm/radeon/r600/kms: rv670 is not DCE3 drm/radeon/kms: r420 idle after programming GA_ENHANCE drm/radeon/kms: more fixes to rv770 suspend/resume path. drm/radeon/kms: more alignment for rv770.c with r600.c drm/radeon/kms: rv770 blit init called too late. drm/radeon/kms: move around new init path code to avoid posting at init drm/radeon/r600: fix some issues with suspend/resume. drm/radeon/kms: disable VGA rendering engine before taking over VRAM drm/radeon/kms: Move radeon_get_clock_info() call out of radeon_clocks_init(). drm/radeon/kms: add initial connector properties drm/radeon/kms: Use surfaces for scanout / cursor byte swapping on big endian. drm/radeon/kms: don't fail if we fail to init GPU acceleration drm/r600/kms: fixup number of loops per blit calculation. drm/radeon/kms: reprogram format in set base. drm/radeon: avivo chips have no separate int bit for display drm/radeon/r600: don't do interrupts drm: fix _DRM_GEM addmap error message drm: update crtc x/y when only fb changes ... Fixed up trivial conflicts in firmware/Makefile due to network driver (cxgb3) and drm (mga/r128/radeon) firmware being listed next to each other.
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Ingo Molnar authored
The build of the dabusb driver broke: drivers/media/video/dabusb.c:758: error: unknown field 'nodename' specified in initializer drivers/media/video/dabusb.c:758: warning: initialization from incompatible pointer type make[3]: *** wait: No child processes. Stop. Due to this commit: e454cea2: Driver-Core: extend devnode callbacks to provide permissions Missing the dabusb driver's dabusb_nodename() callback. Similar issues with the iio/industrialio driver in staging, pointed out and patched by Jean Delvare. Signed-off-by:
Ingo Molnar <mingo@elte.hu> Industrialio-parts-by:
Jean Delvare <khali@linux-fr.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Jens Axboe authored
NFS may free the server structure without ever having used the bdi, so we either need to flag the bdi as being uninitialized or initialize it up front. This does the latter. This fixes a crash with mounting more than one NFS file system, should people ever need that kind of obscure NFS functionality. Tested-by:
Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by:
Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by:
Jens Axboe <jens.axboe@oracle.com>
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Jens Axboe authored
Currently it just sleeps for a very short time, just 1 jiffy. If we keep looping in there, continually delay for a little longer of up to 100msec in total. That was the old limit for congestion wait. Signed-off-by:
Jens Axboe <jens.axboe@oracle.com>
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Jens Axboe authored
Just use schedule_timeout_interruptible(), saves a call to set_current_state(). Signed-off-by:
Jens Axboe <jens.axboe@oracle.com>
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Jens Axboe authored
Otherwise we could be attempting to flush data for a writeback thread and bdi that have already disappeared. Signed-off-by:
Jens Axboe <jens.axboe@oracle.com>
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Artem Bityutskiy authored
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 into linux-next Conflicts: fs/ubifs/super.c Merge the upstream tree in order to resolve a conflict with the per-bdi writeback changes from the linux-2.6-block tree.
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Peter Williams authored
By removing the need for it to know details of scheduling classes. This allows PlugSched to define orthogonal scheduling classes. Signed-off-by:
Peter Williams <pwil3058@bigpond.net.au> Acked-by:
Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> LKML-Reference: <06d1b89ee15a0eef82d7.1253496713@mudlark.pw.nest> Signed-off-by:
Ingo Molnar <mingo@elte.hu>
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Paul Mackerras authored
Commit 5622f295 ("x86, perf_counter, bts: Optimize BTS overflow handling") removed the regs field from struct perf_sample_data and added a regs parameter to perf_counter_overflow(). This breaks the build on powerpc (and Sparc) as reported by Sachin Sant: arch/powerpc/kernel/perf_counter.c: In function 'record_and_restart': arch/powerpc/kernel/perf_counter.c:1165: error: unknown field 'regs' specified in initializer This adjusts arch/powerpc/kernel/perf_counter.c to correspond with the new struct perf_sample_data and perf_counter_overflow(). [ v2: also fix Sparc, Markus Metzger <markus.t.metzger@intel.com> ] Reported-by:
Sachin Sant <sachinp@in.ibm.com> Signed-off-by:
Paul Mackerras <paulus@samba.org> Cc: Markus Metzger <markus.t.metzger@intel.com> Cc: David S. Miller <davem@davemloft.net> Cc: benh@kernel.crashing.org Cc: linuxppc-dev@ozlabs.org Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <19127.8400.376239.586120@drongo.ozlabs.ibm.com> Signed-off-by:
Ingo Molnar <mingo@elte.hu>
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Dave Airlie authored
VGA arb requires DRM support for non-kms drivers, to turn on/off irqs when disabling the mem/io regions. VGA arb requires KMS support for GPUs where we can turn off VGA decoding. Currently we know how to do this for intel and radeon kms drivers, which allows them to be removed from the arbiter. This patch comes from Fedora rawhide kernel. Signed-off-by:
Dave Airlie <airlied@redhat.com>
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Alex Deucher authored
This patch makes sure the CP doesn't DMA do VRAM while 2D is active by inserting a CP resync token. todo: port to kms. Signed-off-by:
Dave Airlie <airlied@redhat.com>
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Alex Deucher authored
RV670 was using the wrong modesetting code. Signed-off-by:
Alex Deucher <alexdeucher@gmail.com> Signed-off-by:
Dave Airlie <airlied@redhat.com>
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Dave Airlie authored
https://bugs.freedesktop.org/show_bug.cgi?id=24041 The idle allows rs690 to startup properly. Signed-off-by:
Dave Airlie <airlied@redhat.com>
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Dave Airlie authored
This resumes my RV730PRO (4650) RV770 (4850) fine. Still researching the RV4550 (RV710), resumes without X fine. Signed-off-by:
Dave Airlie <airlied@redhat.com>
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- 20 Sep, 2009 11 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/jaswinder/linux-2.6Linus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/jaswinder/linux-2.6: includecheck fix: x86, cpu/common.c includecheck fix: kernel/trace, ring_buffer.c includecheck fix: include/linux, ftrace.h includecheck fix: include/linux, page_cgroup.h includecheck fix: include/linux, aio.h includecheck fix: include/drm, drm_memory.h includecheck fix: include/acpi, acpi_bus.h includecheck fix: drivers/xen, evtchn.c includecheck fix: drivers/video, vgacon.c includecheck fix: drivers/scsi, ibmvscsi.c includecheck fix: drivers/scsi, libfcoe.c includecheck fix: x86, shadow.c includecheck fix: x86, traps.c includecheck fix: um, helper.c includecheck fix: s390, sys_s390.c
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Linus Torvalds authored
Ingo points out that I screwed up when merging the 'timers-for-linus' branch in commit a03fdb76. A bit too much copy-and-pasting caused the end result to have an extraneous 'return' in the middle of an expression. That was obviously bogus. Blush. Reported-by-with-patch: Ingo Molnar <mingo@elte.hu> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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git://aeryn.fluff.org.uk/bjdooks/linuxLinus Torvalds authored
* 'next-i2c' of git://aeryn.fluff.org.uk/bjdooks/linux: [PATCH] i2c-imx: make bus available early i2c-mv64xxx: correct mv64xxx_i2c_intr() return type
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6Linus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6: Driver-Core: extend devnode callbacks to provide permissions
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6Linus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6: (79 commits) USB serial: update the console driver usb-serial: straighten out serial_open usb-serial: add missing tests and debug lines usb-serial: rename subroutines usb-serial: fix termios initialization logic usb-serial: acquire references when a new tty is installed usb-serial: change logic of serial lookups usb-serial: put subroutines in logical order usb-serial: change referencing of port and serial structures tty: Char: mxser, use THRE for ASPP_OQUEUE ioctl tty: Char: mxser, add support for CP112UL uartlite: support shared interrupt lines tty: USB: serial/mct_u232, fix tty refcnt tty: riscom8, fix tty refcnt tty: riscom8, fix shutdown declaration TTY: fix typos tty: Power: fix suspend vt regression tty: vt: use printk_once tty: handle VT specific compat ioctls in vt driver n_tty: move echoctl check and clean up logic ...
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Linus Torvalds authored
Merge branch 'perfcounters-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perfcounters-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (58 commits) perf_counter: Fix perf_copy_attr() pointer arithmetic perf utils: Use a define for the maximum length of a trace event perf: Add timechart help text and add timechart to "perf help" tracing, x86, cpuidle: Move the end point of a C state in the power tracer perf utils: Be consistent about minimum text size in the svghelper perf timechart: Add "perf timechart record" perf: Add the timechart tool perf: Add a SVG helper library file tracing, perf: Convert the power tracer into an event tracer perf: Add a sample_event type to the event_union perf: Allow perf utilities to have "callback" options without arguments perf: Store trace event name/id pairs in perf.data perf: Add a timestamp to fork events sched_clock: Make it NMI safe perf_counter: Fix up swcounter throttling x86, perf_counter, bts: Optimize BTS overflow handling perf sched: Add --input=file option to builtin-sched.c perf trace: Sample timestamp and cpu when using record flag perf tools: Increase MAX_EVENT_LENGTH perf tools: Fix memory leak in read_ftrace_printk() ...
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Alok Kataria authored
On an AMD-64 system the processor frequency that is printed during system boot, may be different than the tsc frequency that was returned by the hypervisor, due to the value returned from calibrate_cpu. For debugging timekeeping or other related issues it might be better to get the tsc_khz value returned by the hypervisor. The patch below now prints the tsc frequency that the VMware hypervisor returned. Signed-off-by:
Alok N Kataria <akataria@vmware.com> LKML-Reference: <1252095219.12518.13.camel@ank32.eng.vmware.com> Signed-off-by:
Ingo Molnar <mingo@elte.hu>
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Ingo Molnar authored
Merge reason: Bring in changes that the next patch will depend on. Signed-off-by:
Ingo Molnar <mingo@elte.hu>
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Jan Beulich authored
While these don't get actively used (afaict), it still doesn't hurt for them to properly reflect what how respective segments will get mapped/ accessed. Signed-off-by:
Jan Beulich <jbeulich@novell.com> LKML-Reference: <4AA0E95F0200007800013707@vpn.id2.novell.com> Signed-off-by:
Ingo Molnar <mingo@elte.hu>
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Jan Beulich authored
Add missing annotations, and make use of include/linux/init.h's macros. Signed-off-by:
Jan Beulich <jbeulich@novell.com> LKML-Reference: <4AA0E8F60200007800013703@vpn.id2.novell.com> Signed-off-by:
Ingo Molnar <mingo@elte.hu>
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Jan Beulich authored
On one of my systems, several thousand iterations are needed before CMD_RESET can be observed clear after setting it. Using a much higher value here obviously cannot hurt. Signed-off-by:
Jan Beulich <jbeulich@novell.com> Cc: Yinghai Lu <yhlu.kernel@gmail.com> LKML-Reference: <4AA0E85D02000078000136F9@vpn.id2.novell.com> Signed-off-by:
Ingo Molnar <mingo@elte.hu>
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