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authorDaniel Walker <dwalker@mvista.com>2006-06-23 05:05:29 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-23 10:43:04 -0400
commit89d0cf01c0aa9e8241cc3703a359ecd6abf3c28a (patch)
tree149611b8bbd430d482299f5b976da6a6cfc1e718 /kernel
parentd20d04bc9befbd752092b4aa42bb8254a1af0776 (diff)
[PATCH] invert irq/migration.c brach prediction
If you get to that point in the code it means that desc->move_irq is set, pending_irq_cpumask[irq] and cpu_online_map should have a value. Still pretty good chance anding those two you'll still have a value. So these two branch predictors should be inverted. Signed-off-by: Daniel Walker <dwalker@mvista.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/irq/migration.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/irq/migration.c b/kernel/irq/migration.c
index 134f9f2e0e39..a12d00eb5e7c 100644
--- a/kernel/irq/migration.c
+++ b/kernel/irq/migration.c
@@ -30,7 +30,7 @@ void move_native_irq(int irq)
30 30
31 desc->move_irq = 0; 31 desc->move_irq = 0;
32 32
33 if (likely(cpus_empty(pending_irq_cpumask[irq]))) 33 if (unlikely(cpus_empty(pending_irq_cpumask[irq])))
34 return; 34 return;
35 35
36 if (!desc->handler->set_affinity) 36 if (!desc->handler->set_affinity)
@@ -49,7 +49,7 @@ void move_native_irq(int irq)
49 * cause some ioapics to mal-function. 49 * cause some ioapics to mal-function.
50 * Being paranoid i guess! 50 * Being paranoid i guess!
51 */ 51 */
52 if (unlikely(!cpus_empty(tmp))) { 52 if (likely(!cpus_empty(tmp))) {
53 if (likely(!(desc->status & IRQ_DISABLED))) 53 if (likely(!(desc->status & IRQ_DISABLED)))
54 desc->handler->disable(irq); 54 desc->handler->disable(irq);
55 55