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authorWill Deacon <will.deacon@arm.com>2015-09-11 15:31:24 +0100
committerWill Deacon <will.deacon@arm.com>2015-09-17 11:57:02 +0100
commite56d82a116176f7af9d642b560abbbd3a2b68013 (patch)
tree68ce5a9e344739c7b60273e98d68ad97a2249a6f /arch/arm64/kernel
parentd10bcd473301888f957ec4b6b12aa3621be78d59 (diff)
arm64: cpu hotplug: ensure we mask out CPU_TASKS_FROZEN in notifiers
We have a couple of CPU hotplug notifiers for resetting the CPU debug state to a sane value when a CPU comes online. This patch ensures that we mask out CPU_TASKS_FROZEN so that we don't miss any online events occuring due to suspend/resume. Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/kernel')
-rw-r--r--arch/arm64/kernel/debug-monitors.c2
-rw-r--r--arch/arm64/kernel/hw_breakpoint.c2
2 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm64/kernel/debug-monitors.c b/arch/arm64/kernel/debug-monitors.c
index 9b3b62ac9c24..cebf78661a55 100644
--- a/arch/arm64/kernel/debug-monitors.c
+++ b/arch/arm64/kernel/debug-monitors.c
@@ -134,7 +134,7 @@ static int os_lock_notify(struct notifier_block *self,
unsigned long action, void *data)
{
int cpu = (unsigned long)data;
- if (action == CPU_ONLINE)
+ if ((action & ~CPU_TASKS_FROZEN) == CPU_ONLINE)
smp_call_function_single(cpu, clear_os_lock, NULL, 1);
return NOTIFY_OK;
}
diff --git a/arch/arm64/kernel/hw_breakpoint.c b/arch/arm64/kernel/hw_breakpoint.c
index c97040ecf838..bba85c8f8037 100644
--- a/arch/arm64/kernel/hw_breakpoint.c
+++ b/arch/arm64/kernel/hw_breakpoint.c
@@ -872,7 +872,7 @@ static int hw_breakpoint_reset_notify(struct notifier_block *self,
void *hcpu)
{
int cpu = (long)hcpu;
- if (action == CPU_ONLINE)
+ if ((action & ~CPU_TASKS_FROZEN) == CPU_ONLINE)
smp_call_function_single(cpu, hw_breakpoint_reset, NULL, 1);
return NOTIFY_OK;
}