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authorFrederic Weisbecker <fweisbec@gmail.com>2013-09-24 10:39:41 -0400
committerFrederic Weisbecker <fweisbec@gmail.com>2013-10-01 06:53:25 -0400
commitbe6e1016440860fc4ec098b2d0aed3d0397b5d6e (patch)
tree6de1ac73642c9c54e7207c5b4fc3e751d20a1341 /kernel/softirq.c
parent7d65f4a6553203da6a22097821d151fbbe7e4956 (diff)
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@linux-foundation.org> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@au1.ibm.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Mackerras <paulus@au1.ibm.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: James E.J. Bottomley <jejb@parisc-linux.org> Cc: Helge Deller <deller@gmx.de> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: David S. Miller <davem@davemloft.net> Cc: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'kernel/softirq.c')
-rw-r--r--kernel/softirq.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/softirq.c b/kernel/softirq.c
index 26ee72725d29..17c5cd2e3dae 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -335,7 +335,7 @@ static inline void invoke_softirq(void)
335 * in its own stack to prevent from any overrun on top 335 * in its own stack to prevent from any overrun on top
336 * of a potentially deep task stack. 336 * of a potentially deep task stack.
337 */ 337 */
338 do_softirq(); 338 do_softirq_own_stack();
339 } else { 339 } else {
340 wakeup_softirqd(); 340 wakeup_softirqd();
341 } 341 }