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authorAnna-Maria Gleixner <anna-maria@linutronix.de>2017-12-21 13:41:47 +0300
committerIngo Molnar <mingo@kernel.org>2018-01-16 04:53:28 +0300
commitebba2c723f38a766546b2eaf828c522576c791d4 (patch)
tree2774f6519ebff41a0e7fa76c1a0d95f939a0f497 /kernel/time
parent11a9fe069e341ac53bddb8fe1a85ea986cff1a42 (diff)
downloadlinux-ebba2c723f38a766546b2eaf828c522576c791d4.tar.xz
hrtimer: Make hrtimer_force_reprogramm() unconditionally available
hrtimer_force_reprogram() needs to be available unconditionally for softirq based hrtimers. Move the function and all required struct members out of the CONFIG_HIGH_RES_TIMERS #ifdef. There is no functional change because hrtimer_force_reprogram() is only invoked when hrtimer_cpu_base.hres_active is true and CONFIG_HIGH_RES_TIMERS=y. Making it unconditional increases the text size for the CONFIG_HIGH_RES_TIMERS=n case slightly, but avoids replication of that code for the upcoming softirq based hrtimers support. Most of the code gets eliminated in the CONFIG_HIGH_RES_TIMERS=n case by the compiler. Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de> Cc: Christoph Hellwig <hch@lst.de> Cc: John Stultz <john.stultz@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: keescook@chromium.org Link: http://lkml.kernel.org/r/20171221104205.7269-19-anna-maria@linutronix.de [ Made it build on !CONFIG_HIGH_RES_TIMERS ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/time')
-rw-r--r--kernel/time/hrtimer.c60
1 files changed, 28 insertions, 32 deletions
diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
index 63d804aea1ea..2b3222ea2a6c 100644
--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -458,7 +458,6 @@ __next_base(struct hrtimer_cpu_base *cpu_base, unsigned int *active)
#define for_each_active_base(base, cpu_base, active) \
while ((base = __next_base((cpu_base), &(active))))
-#if defined(CONFIG_NO_HZ_COMMON) || defined(CONFIG_HIGH_RES_TIMERS)
static ktime_t __hrtimer_get_next_event(struct hrtimer_cpu_base *cpu_base)
{
struct hrtimer_clock_base *base;
@@ -487,7 +486,6 @@ static ktime_t __hrtimer_get_next_event(struct hrtimer_cpu_base *cpu_base)
expires_next = 0;
return expires_next;
}
-#endif
static inline ktime_t hrtimer_update_base(struct hrtimer_cpu_base *base)
{
@@ -513,34 +511,6 @@ static inline int hrtimer_hres_active(void)
return __hrtimer_hres_active(this_cpu_ptr(&hrtimer_bases));
}
-/* High resolution timer related functions */
-#ifdef CONFIG_HIGH_RES_TIMERS
-
-/*
- * High resolution timer enabled ?
- */
-static bool hrtimer_hres_enabled __read_mostly = true;
-unsigned int hrtimer_resolution __read_mostly = LOW_RES_NSEC;
-EXPORT_SYMBOL_GPL(hrtimer_resolution);
-
-/*
- * Enable / Disable high resolution mode
- */
-static int __init setup_hrtimer_hres(char *str)
-{
- return (kstrtobool(str, &hrtimer_hres_enabled) == 0);
-}
-
-__setup("highres=", setup_hrtimer_hres);
-
-/*
- * hrtimer_high_res_enabled - query, if the highres mode is enabled
- */
-static inline int hrtimer_is_hres_enabled(void)
-{
- return hrtimer_hres_enabled;
-}
-
/*
* Reprogram the event source with checking both queues for the
* next event
@@ -581,6 +551,34 @@ hrtimer_force_reprogram(struct hrtimer_cpu_base *cpu_base, int skip_equal)
tick_program_event(cpu_base->expires_next, 1);
}
+/* High resolution timer related functions */
+#ifdef CONFIG_HIGH_RES_TIMERS
+
+/*
+ * High resolution timer enabled ?
+ */
+static bool hrtimer_hres_enabled __read_mostly = true;
+unsigned int hrtimer_resolution __read_mostly = LOW_RES_NSEC;
+EXPORT_SYMBOL_GPL(hrtimer_resolution);
+
+/*
+ * Enable / Disable high resolution mode
+ */
+static int __init setup_hrtimer_hres(char *str)
+{
+ return (kstrtobool(str, &hrtimer_hres_enabled) == 0);
+}
+
+__setup("highres=", setup_hrtimer_hres);
+
+/*
+ * hrtimer_high_res_enabled - query, if the highres mode is enabled
+ */
+static inline int hrtimer_is_hres_enabled(void)
+{
+ return hrtimer_hres_enabled;
+}
+
/*
* Retrigger next event is called after clock was set
*
@@ -639,8 +637,6 @@ void clock_was_set_delayed(void)
static inline int hrtimer_is_hres_enabled(void) { return 0; }
static inline void hrtimer_switch_to_hres(void) { }
-static inline void
-hrtimer_force_reprogram(struct hrtimer_cpu_base *base, int skip_equal) { }
static inline void retrigger_next_event(void *arg) { }
#endif /* CONFIG_HIGH_RES_TIMERS */