[PATCH] ia64: Remove superfluous SMP function call

From: Anna-Maria Gleixner
Date: Mon May 02 2016 - 07:49:57 EST

Since commit 3b9d6da67e11 ("cpu/hotplug: Fix rollback during error-out
in __cpu_disable()") it is ensured that callbacks of CPU_ONLINE and
CPU_DOWN_PREPARE are processed on the hotplugged CPU. Due to this SMP
function calls are no longer required.

Replace smp_call_function_single() with a direct call to
ia64_mca_cmc_vector_adjust(). The function itselfs handles disable and
enable interrupts, therefore the smp_call_function_single() calling
convention is not preserved.

Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: Fenghua Yu <fenghua.yu@xxxxxxxxx>
Cc: linux-ia64@xxxxxxxxxxxxxxx
Signed-off-by: Anna-Maria Gleixner <anna-maria@xxxxxxxxxxxxx>
arch/ia64/kernel/mca.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)

--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -1904,13 +1904,10 @@ static int mca_cpu_callback(struct notif
unsigned long action,
void *hcpu)
- int hotcpu = (unsigned long) hcpu;
switch (action) {
- smp_call_function_single(hotcpu, ia64_mca_cmc_vector_adjust,
- NULL, 0);
+ ia64_mca_cmc_vector_adjust(NULL);
return NOTIFY_OK;