Commit-ID: be6e1016440860fc4ec098b2d0aed3d0397b5d6e
Gitweb: http://git.kernel.org/tip/be6e1016440860fc4ec098b2d0aed3d0397b5d6e
Author: Frederic Weisbecker <fweisbec@xxxxxxxxx>
AuthorDate: Tue, 24 Sep 2013 16:39:41 +0200
Committer: Frederic Weisbecker <fweisbec@xxxxxxxxx>
CommitDate: Tue, 1 Oct 2013 12:53:25 +0200
irq: Optimize call to softirq on hardirq exit
Before processing softirqs on hardirq exit, we already
do the check for pending softirqs while hardirqs are
guaranteed to be disabled.
So we can take a shortcut and safely jump to the arch
specific implementation directly.
Acked-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: H. Peter Anvin <hpa@xxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxxxx>
Cc: James Hogan <james.hogan@xxxxxxxxxx>
Cc: James E.J. Bottomley <jejb@xxxxxxxxxxxxxxxx>
Cc: Helge Deller <deller@xxxxxx>
Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Cc: David S. Miller <davem@xxxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/softirq.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/softirq.c b/kernel/softirq.c
index 26ee727..17c5cd2 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -335,7 +335,7 @@ static inline void invoke_softirq(void)
* in its own stack to prevent from any overrun on top
* of a potentially deep task stack.
*/
- do_softirq();
+ do_softirq_own_stack();
} else {
wakeup_softirqd();
}
--
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