| Message ID | 1459766549-17189-1-git-send-email-anna-maria@linutronix.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
--- a/arch/arm64/kernel/debug-monitors.c +++ b/arch/arm64/kernel/debug-monitors.c @@ -135,9 +135,8 @@ static void clear_os_lock(void *unused) static int os_lock_notify(struct notifier_block *self, unsigned long action, void *data) { - int cpu = (unsigned long)data; if ((action & ~CPU_TASKS_FROZEN) == CPU_ONLINE) - smp_call_function_single(cpu, clear_os_lock, NULL, 1); + clear_os_lock(NULL); return NOTIFY_OK; }
Since commit 1cf4f629d9d2 "cpu/hotplug: Move online calls to hotplugged cpu" 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 clear_os_lock(). The function writes the OSLAR register to clear OS locking. This does not require to be called with interrupts disabled, therefore the smp_call_function_single() calling convention is not preserved. Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: linux-arm-kernel@lists.infradead.or Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de> --- arch/arm64/kernel/debug-monitors.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)