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Frederic Weisbecker edf55fda35 x86: Exit RCU extended QS on notify resume

do_notify_resume() may be called on irq or exception
exit. But at that time the exception has already called
rcu_user_enter() and the irq has already called rcu_irq_exit().

Since it can use RCU read side critical section, we must call
rcu_user_exit() before doing anything there. Then we must call
back rcu_user_enter() after this function because we know we are
going to userspace from there.

This complete support for userspace RCU extended quiescent state
in x86-64.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Alessio Igor Bogani <abogani@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Avi Kivity <avi@redhat.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Geoff Levand <geoff@infradead.org>
Cc: Gilad Ben Yossef <gilad@benyossef.com>
Cc: Hakan Akkan <hakanakkan@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Josh Triplett <josh@joshtriplett.org>
Cc: Kevin Hilman <khilman@ti.com>
Cc: Max Krasnyansky <maxk@qualcomm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephen Hemminger <shemminger@vyatta.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Sven-Thorsten Dietrich <thebigcorporation@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>

2012-09-26 15:47:14 +02:00

..

alpha: Add missing RCU idle APIs on idle loop

2012-09-23 07:44:43 -07:00

Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm

2012-09-22 12:40:16 -07:00

ipc: use Kconfig options for __ARCH_WANT_[COMPAT_]IPC_PARSE_VERSION

2012-07-30 17:25:21 -07:00

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lliubbo/blackfin

2012-09-12 07:12:53 +08:00

Merge tag 'for-linus' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming

2012-08-17 08:10:12 -07:00

cris: Add missing RCU idle APIs on idle loop

2012-09-23 07:44:44 -07:00

frv: Add missing RCU idle APIs on idle loop

2012-09-23 07:44:45 -07:00

h8300: Add missing RCU idle APIs on idle loop

2012-09-23 07:44:46 -07:00

Merge branch 'trivial' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild

2012-07-30 11:24:53 -07:00

ia64: Add missing RCU idle APIs on idle loop

2012-09-23 07:44:52 -07:00

m32r: Add missing RCU idle APIs on idle loop

2012-09-23 07:44:47 -07:00

Merge remote-tracking branch 'tip/core/rcu' into next.2012.09.25b

2012-09-25 10:03:56 -07:00

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k

2012-08-03 10:52:41 -07:00

Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus

2012-09-22 12:47:53 -07:00

mn10300: Add missing RCU idle APIs on idle loop

2012-09-23 07:44:48 -07:00

Remove useless wrappers of asm-generic/rmap.h

2012-06-28 11:29:26 +02:00

parisc: Add missing RCU idle APIs on idle loop

2012-09-23 07:44:49 -07:00

powerpc: Don't use __put_user() in patch_instruction

2012-09-05 16:05:23 +10:00

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

2012-09-21 12:10:17 -07:00

score: Add missing RCU idle APIs on idle loop

2012-09-23 07:44:50 -07:00

sh: Fix up TIF_NOTIFY_RESUME sans TIF_SIGPENDING handling.

2012-09-18 17:04:37 +09:00

sparc: fix the return value of module_alloc()

2012-09-21 12:14:20 -07:00

memcg: rename config variables

2012-07-31 18:42:43 -07:00

rcu: Switch task's syscall hooks on context switch

2012-09-26 15:47:02 +02:00

Merge tag 'for-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

2012-07-24 16:17:07 -07:00

x86: Exit RCU extended QS on notify resume

2012-09-26 15:47:14 +02:00

xtensa: Add missing RCU idle APIs on idle loop

2012-09-23 07:44:51 -07:00

.gitignore

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Kconfig

rcu: Settle config for userspace extended quiescent state

2012-09-26 15:44:04 +02:00