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authorPeter Zijlstra <[email protected]>2011-04-05 17:23:39 +0200
committerIngo Molnar <[email protected]>2011-04-14 08:52:32 +0200
commit184748cc50b2dceb8287f9fb657eda48ff8fcfe7 (patch)
treeda32494cf29e5ec9f80b17dc8590bdc450ea545a /arch/sparc/kernel/smp_32.c
parenta4c98f8bbeafee12c979c90743f6fda94f7515c7 (diff)
sched: Provide scheduler_ipi() callback in response to smp_send_reschedule()
For future rework of try_to_wake_up() we'd like to push part of that function onto the CPU the task is actually going to run on. In order to do so we need a generic callback from the existing scheduler IPI. This patch introduces such a generic callback: scheduler_ipi() and implements it as a NOP. BenH notes: PowerPC might use this IPI on offline CPUs under rare conditions! Acked-by: Russell King <[email protected]> Acked-by: Martin Schwidefsky <[email protected]> Acked-by: Chris Metcalf <[email protected]> Acked-by: Jesper Nilsson <[email protected]> Acked-by: Benjamin Herrenschmidt <[email protected]> Signed-off-by: Ralf Baechle <[email protected]> Reviewed-by: Frank Rowand <[email protected]> Cc: Mike Galbraith <[email protected]> Cc: Nick Piggin <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Andrew Morton <[email protected]> Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Peter Zijlstra <[email protected]> Link: http://lkml.kernel.org/r/[email protected]
Diffstat (limited to 'arch/sparc/kernel/smp_32.c')
-rw-r--r--arch/sparc/kernel/smp_32.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/sparc/kernel/smp_32.c b/arch/sparc/kernel/smp_32.c
index 91c10fb70858..f95690c167b6 100644
--- a/arch/sparc/kernel/smp_32.c
+++ b/arch/sparc/kernel/smp_32.c
@@ -125,7 +125,9 @@ struct linux_prom_registers smp_penguin_ctable __cpuinitdata = { 0 };
void smp_send_reschedule(int cpu)
{
- /* See sparc64 */
+ /*
+ * XXX missing reschedule IPI, see scheduler_ipi()
+ */
}
void smp_send_stop(void)