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authorAnna-Maria Gleixner <anna-maria@linutronix.de>2016-04-06 10:42:28 +0200
committerWill Deacon <will.deacon@arm.com>2016-04-14 18:13:03 +0100
commit499c81507f599d4e753cf6401f921e68efab235a (patch)
tree6c40972e707ec9efc9c25f38b58f176e57932c57 /arch/arm64/kernel/debug-monitors.c
parent97740051dd31d200a0efaa84544fe5e4713aac40 (diff)
arm64/debug: Remove superfluous SMP function call
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.org Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de> Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/kernel/debug-monitors.c')
-rw-r--r--arch/arm64/kernel/debug-monitors.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/arm64/kernel/debug-monitors.c b/arch/arm64/kernel/debug-monitors.c
index c45f2968bc8c..4fbf3c54275c 100644
--- 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;
}