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authorFrederic Weisbecker <fweisbec@gmail.com>2013-11-06 14:45:57 +0100
committerFrederic Weisbecker <fweisbec@gmail.com>2013-12-02 20:43:14 +0100
commit58135f574f1b791c926622387780ed3d090116d6 (patch)
treedc6c361777cd0f1bf051dbbddeccb7942400951d /include
parent99c8b1ea0972be82ce1842d830e0173e70907065 (diff)
downloadlinux-linaro-stable-58135f574f1b791c926622387780ed3d090116d6.tar.gz
context_tracking: Wrap static key check into more intuitive function name
Use a function with a meaningful name to check the global context tracking state. static_key_false() is a bit confusing for reviewers. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/context_tracking.h10
-rw-r--r--include/linux/context_tracking_state.h4
-rw-r--r--include/linux/tick.h2
-rw-r--r--include/linux/vtime.h2
4 files changed, 11 insertions, 7 deletions
diff --git a/include/linux/context_tracking.h b/include/linux/context_tracking.h
index 158158704c30..37b81bd51ec0 100644
--- a/include/linux/context_tracking.h
+++ b/include/linux/context_tracking.h
@@ -17,13 +17,13 @@ extern void __context_tracking_task_switch(struct task_struct *prev,
static inline void user_enter(void)
{
- if (static_key_false(&context_tracking_enabled))
+ if (context_tracking_is_enabled())
context_tracking_user_enter();
}
static inline void user_exit(void)
{
- if (static_key_false(&context_tracking_enabled))
+ if (context_tracking_is_enabled())
context_tracking_user_exit();
}
@@ -31,7 +31,7 @@ static inline enum ctx_state exception_enter(void)
{
enum ctx_state prev_ctx;
- if (!static_key_false(&context_tracking_enabled))
+ if (!context_tracking_is_enabled())
return 0;
prev_ctx = this_cpu_read(context_tracking.state);
@@ -42,7 +42,7 @@ static inline enum ctx_state exception_enter(void)
static inline void exception_exit(enum ctx_state prev_ctx)
{
- if (static_key_false(&context_tracking_enabled)) {
+ if (context_tracking_is_enabled()) {
if (prev_ctx == IN_USER)
context_tracking_user_enter();
}
@@ -51,7 +51,7 @@ static inline void exception_exit(enum ctx_state prev_ctx)
static inline void context_tracking_task_switch(struct task_struct *prev,
struct task_struct *next)
{
- if (static_key_false(&context_tracking_enabled))
+ if (context_tracking_is_enabled())
__context_tracking_task_switch(prev, next);
}
#else
diff --git a/include/linux/context_tracking_state.h b/include/linux/context_tracking_state.h
index 0f1979d0674f..0db535b79be7 100644
--- a/include/linux/context_tracking_state.h
+++ b/include/linux/context_tracking_state.h
@@ -22,6 +22,10 @@ struct context_tracking {
extern struct static_key context_tracking_enabled;
DECLARE_PER_CPU(struct context_tracking, context_tracking);
+static inline bool context_tracking_is_enabled(void)
+{
+ return static_key_false(&context_tracking_enabled);
+}
static inline bool context_tracking_in_user(void)
{
return __this_cpu_read(context_tracking.state) == IN_USER;
diff --git a/include/linux/tick.h b/include/linux/tick.h
index a004f66a6cf0..0175d8663b6c 100644
--- a/include/linux/tick.h
+++ b/include/linux/tick.h
@@ -165,7 +165,7 @@ extern cpumask_var_t tick_nohz_full_mask;
static inline bool tick_nohz_full_enabled(void)
{
- if (!static_key_false(&context_tracking_enabled))
+ if (!context_tracking_is_enabled())
return false;
return tick_nohz_full_running;
diff --git a/include/linux/vtime.h b/include/linux/vtime.h
index f5b72b364bda..807c732cbf29 100644
--- a/include/linux/vtime.h
+++ b/include/linux/vtime.h
@@ -19,7 +19,7 @@ static inline bool vtime_accounting_enabled(void) { return true; }
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
static inline bool vtime_accounting_enabled(void)
{
- if (static_key_false(&context_tracking_enabled)) {
+ if (context_tracking_is_enabled()) {
if (context_tracking_active())
return true;
}