diff options
Diffstat (limited to 'kernel/context_tracking.c')
-rw-r--r-- | kernel/context_tracking.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/kernel/context_tracking.c b/kernel/context_tracking.c index 013161f1c807..e5f3917aa05b 100644 --- a/kernel/context_tracking.c +++ b/kernel/context_tracking.c | |||
@@ -51,6 +51,15 @@ void context_tracking_user_enter(void) | |||
51 | unsigned long flags; | 51 | unsigned long flags; |
52 | 52 | ||
53 | /* | 53 | /* |
54 | * Repeat the user_enter() check here because some archs may be calling | ||
55 | * this from asm and if no CPU needs context tracking, they shouldn't | ||
56 | * go further. Repeat the check here until they support the static key | ||
57 | * check. | ||
58 | */ | ||
59 | if (!static_key_false(&context_tracking_enabled)) | ||
60 | return; | ||
61 | |||
62 | /* | ||
54 | * Some contexts may involve an exception occuring in an irq, | 63 | * Some contexts may involve an exception occuring in an irq, |
55 | * leading to that nesting: | 64 | * leading to that nesting: |
56 | * rcu_irq_enter() rcu_user_exit() rcu_user_exit() rcu_irq_exit() | 65 | * rcu_irq_enter() rcu_user_exit() rcu_user_exit() rcu_irq_exit() |
@@ -151,6 +160,9 @@ void context_tracking_user_exit(void) | |||
151 | { | 160 | { |
152 | unsigned long flags; | 161 | unsigned long flags; |
153 | 162 | ||
163 | if (!static_key_false(&context_tracking_enabled)) | ||
164 | return; | ||
165 | |||
154 | if (in_interrupt()) | 166 | if (in_interrupt()) |
155 | return; | 167 | return; |
156 | 168 | ||