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| author | Anna-Maria Gleixner <anna-maria@linutronix.de> | 2016-04-06 10:42:49 +0200 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2016-04-14 18:13:03 +0100 |
| commit | 4bc49274403395db41dc4ae7d2080346b2319d34 (patch) | |
| tree | dc8e0d89f7a40feee2df9b8f8fd8b19b4acedccb /arch/arm64/kernel | |
| parent | 499c81507f599d4e753cf6401f921e68efab235a (diff) | |
| download | linux-4bc49274403395db41dc4ae7d2080346b2319d34.tar.gz linux-4bc49274403395db41dc4ae7d2080346b2319d34.tar.bz2 linux-4bc49274403395db41dc4ae7d2080346b2319d34.zip | |
arm64: hw-breakpoint: 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 of
hw_breakpoint_reset(). To keep the calling convention, interrupts are
explicitly disabled around the call.
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')
| -rw-r--r-- | arch/arm64/kernel/hw_breakpoint.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/arm64/kernel/hw_breakpoint.c b/arch/arm64/kernel/hw_breakpoint.c index b45c95d34b83..11dc50ac643a 100644 --- a/arch/arm64/kernel/hw_breakpoint.c +++ b/arch/arm64/kernel/hw_breakpoint.c @@ -886,9 +886,11 @@ static int hw_breakpoint_reset_notify(struct notifier_block *self, unsigned long action, void *hcpu) { - int cpu = (long)hcpu; - if ((action & ~CPU_TASKS_FROZEN) == CPU_ONLINE) - smp_call_function_single(cpu, hw_breakpoint_reset, NULL, 1); + if ((action & ~CPU_TASKS_FROZEN) == CPU_ONLINE) { + local_irq_disable(); + hw_breakpoint_reset(NULL); + local_irq_enable(); + } return NOTIFY_OK; } |