Convert clockevents_unbind from smp_call_function_single
to smp_call_func_single_fail, which will fail in case
the target CPU is tagged as block interference CPU.
Signed-off-by: Marcelo Tosatti <[email protected]>
Index: linux-2.6/kernel/time/clockevents.c
===================================================================
--- linux-2.6.orig/kernel/time/clockevents.c
+++ linux-2.6/kernel/time/clockevents.c
@@ -13,6 +13,7 @@
#include <linux/module.h>
#include <linux/smp.h>
#include <linux/device.h>
+#include <linux/sched/isolation.h>
#include "tick-internal.h"
@@ -416,9 +417,14 @@ static void __clockevents_unbind(void *a
*/
static int clockevents_unbind(struct clock_event_device *ced, int cpu)
{
+ int ret;
struct ce_unbind cu = { .ce = ced, .res = -ENODEV };
- smp_call_function_single(cpu, __clockevents_unbind, &cu, 1);
+ block_interf_read_lock();
+ ret = smp_call_func_single_fail(cpu, __clockevents_unbind, &cu, 1);
+ block_interf_read_unlock();
+ if (ret)
+ return ret;
return cu.res;
}