The patch titled
generic-ipi: cleanup for generic_smp_call_function_interrupt()
has been added to the -mm tree. Its filename is
generic-ipi-cleanup-for-generic_smp_call_function_interrupt.patch
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See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: generic-ipi: cleanup for generic_smp_call_function_interrupt()
From: Xiao Guangrong <xiaoguangrong@xxxxxxxxxxxxxx>
Use smp_processor_id() instead of get_cpu() and put_cpu() in
generic_smp_call_function_interrupt(), It's no need to disable preempt,
beacuse we must call generic_smp_call_function_interrupt() with interrupts
disabled
Signed-off-by: Xiao Guangrong <xiaoguangrong@xxxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Jens Axboe <jens.axboe@xxxxxxxxxx>
Cc: Nick Piggin <nickpiggin@xxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/smp.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff -puN kernel/smp.c~generic-ipi-cleanup-for-generic_smp_call_function_interrupt kernel/smp.c
--- a/kernel/smp.c~generic-ipi-cleanup-for-generic_smp_call_function_interrupt
+++ a/kernel/smp.c
@@ -174,7 +174,7 @@ void generic_exec_single(int cpu, struct
void generic_smp_call_function_interrupt(void)
{
struct call_function_data *data;
- int cpu = get_cpu();
+ int cpu = smp_processor_id();
/*
* Ensure entry is visible on call_function_queue after we have
@@ -217,7 +217,6 @@ void generic_smp_call_function_interrupt
csd_unlock(&data->csd);
}
- put_cpu();
}
/*
_
Patches currently in -mm which might be from xiaoguangrong@xxxxxxxxxxxxxx are
generic-ipi-fix-hotplug_cfd.patch
generic-ipi-cleanup-for-generic_smp_call_function_interrupt.patch
kernel-smpc-relocate-some-code.patch
generic-ipi-fix-the-race-between-generic_smp_call_function_-and-hotplug_cfd.patch
generic-ipi-make-struct-call_function_data-lockless.patch
generic-ipi-make-struct-call_function_data-lockless-cleanup.patch
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