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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2015-11-19 16:47:34 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-12-04 10:34:46 +0100 |
| commit | b7ce2277f087fd052e7e1bbf432f7fecbee82bb6 (patch) | |
| tree | 29f779475ed1e8157a037ad6224d90ff702a8213 /kernel/fork.c | |
| parent | e592539466380279a9e6e6fdfe4545aa54f22593 (diff) | |
| download | op-kernel-dev-b7ce2277f087fd052e7e1bbf432f7fecbee82bb6.zip op-kernel-dev-b7ce2277f087fd052e7e1bbf432f7fecbee82bb6.tar.gz | |
sched/cputime: Convert vtime_seqlock to seqcount
The cputime can only be updated by the current task itself, even in
vtime case. So we can safely use seqcount instead of seqlock as there
is no writer concurrency involved.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Chris Metcalf <cmetcalf@ezchip.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Luiz Capitulino <lcapitulino@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul E . McKenney <paulmck@linux.vnet.ibm.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1447948054-28668-8-git-send-email-fweisbec@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/fork.c')
| -rw-r--r-- | kernel/fork.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index c0a1370..eea32b5 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1348,7 +1348,7 @@ static struct task_struct *copy_process(unsigned long clone_flags, prev_cputime_init(&p->prev_cputime); #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN - seqlock_init(&p->vtime_seqlock); + seqcount_init(&p->vtime_seqcount); p->vtime_snap = 0; p->vtime_snap_whence = VTIME_INACTIVE; #endif |
