rcu: Switch task's syscall hooks on context switch
authorFrederic Weisbecker <fweisbec@gmail.com>
Mon, 16 Jul 2012 22:06:40 +0000 (15:06 -0700)
committerFrederic Weisbecker <fweisbec@gmail.com>
Wed, 26 Sep 2012 13:47:02 +0000 (15:47 +0200)
commit4378d36eddf29689aff08a1062d0b3de9a935c0b
treed1d18c2febd422428fad0746afd23c2fd84684d8
parenta19f3b4b3f0bfa250e819d58eb31d1bb528dab06
rcu: Switch task's syscall hooks on context switch

Clear the syscalls hook of a task when it's scheduled out so that if
the task migrates, it doesn't run the syscall slow path on a CPU
that might not need it.

Also set the syscalls hook on the next task if needed.

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>
arch/um/drivers/mconsole_kern.c
include/linux/rcupdate.h
include/linux/sched.h
kernel/rcutree.c
kernel/sched/core.c