The patch titled
generic-ipi-make-struct-call_function_data-lockless-cleanup
has been added to the -mm tree. Its filename is
generic-ipi-make-struct-call_function_data-lockless-cleanup.patch
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Subject: generic-ipi-make-struct-call_function_data-lockless-cleanup
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Use atomic_dec_return().
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>
Cc: Xiao Guangrong <xiaoguangrong@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/smp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN kernel/smp.c~generic-ipi-make-struct-call_function_data-lockless-cleanup kernel/smp.c
--- a/kernel/smp.c~generic-ipi-make-struct-call_function_data-lockless-cleanup
+++ a/kernel/smp.c
@@ -193,7 +193,7 @@ void generic_smp_call_function_interrupt
data->csd.func(data->csd.info);
- refs = atomic_sub_return(1, &data->refs);
+ refs = atomic_dec_return(&data->refs);
WARN_ON(refs < 0);
if (!refs) {
spin_lock(&call_function.lock);
_
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