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authorMilton Miller <miltonm@bga.com>2011-03-15 13:27:17 -0600
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-17 16:58:11 -0700
commitc8def554d031664e984323f6a5d667f070717776 (patch)
tree2798e92bf75b474aec99ff1fce249dd943994613
parent723aae25d5cdb09962901d36d526b44d4be1051c (diff)
downloadlinux-c8def554d031664e984323f6a5d667f070717776.tar.bz2
smp_call_function_interrupt: use typedef and %pf
Use the newly added smp_call_func_t in smp_call_function_interrupt for the func variable, and make the comment above the WARN more assertive and explicit. Also, func is a function pointer and does not need an offset, so use %pf not %pS. Signed-off-by: Milton Miller <miltonm@bga.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--kernel/smp.c16
1 files changed, 8 insertions, 8 deletions
diff --git a/kernel/smp.c b/kernel/smp.c
index 954548906afb..7cbd0f293df4 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -194,7 +194,7 @@ void generic_smp_call_function_interrupt(void)
*/
list_for_each_entry_rcu(data, &call_function.queue, csd.list) {
int refs;
- void (*func) (void *info);
+ smp_call_func_t func;
/*
* Since we walk the list without any locks, we might
@@ -214,17 +214,17 @@ void generic_smp_call_function_interrupt(void)
if (atomic_read(&data->refs) == 0)
continue;
- func = data->csd.func; /* for later warn */
- data->csd.func(data->csd.info);
+ func = data->csd.func; /* save for later warn */
+ func(data->csd.info);
/*
- * If the cpu mask is not still set then it enabled interrupts,
- * we took another smp interrupt, and executed the function
- * twice on this cpu. In theory that copy decremented refs.
+ * If the cpu mask is not still set then func enabled
+ * interrupts (BUG), and this cpu took another smp call
+ * function interrupt and executed func(info) twice
+ * on this cpu. That nested execution decremented refs.
*/
if (!cpumask_test_and_clear_cpu(cpu, data->cpumask)) {
- WARN(1, "%pS enabled interrupts and double executed\n",
- func);
+ WARN(1, "%pf enabled interrupts and double executed\n", func);
continue;
}