diff options
| author | Milton Miller <miltonm@bga.com> | 2011-03-15 13:27:17 -0600 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-03-17 16:58:11 -0700 |
| commit | c8def554d031664e984323f6a5d667f070717776 (patch) | |
| tree | 2798e92bf75b474aec99ff1fce249dd943994613 /kernel | |
| parent | 723aae25d5cdb09962901d36d526b44d4be1051c (diff) | |
| download | lwn-c8def554d031664e984323f6a5d667f070717776.tar.gz lwn-c8def554d031664e984323f6a5d667f070717776.zip | |
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>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/smp.c | 16 |
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; } |