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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2015-05-12 16:41:47 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-05-19 08:39:12 +0200 |
| commit | 2e10e71ce88e3eaccfd09a045ae6ecebe657ba09 (patch) | |
| tree | e471d5427053c300748fb9b6c4263a8ba8087015 /include/linux/preempt.h | |
| parent | 92cf211874e954027b8e91cc9a15485a50b58d6b (diff) | |
| download | lwn-2e10e71ce88e3eaccfd09a045ae6ecebe657ba09.tar.gz lwn-2e10e71ce88e3eaccfd09a045ae6ecebe657ba09.zip | |
sched/preempt: Rearrange a few symbols after headers merge
Adjust a few comments, and further integrate a few definitions after
the dumb headers copy.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1431441711-29753-3-git-send-email-fweisbec@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/preempt.h')
| -rw-r--r-- | include/linux/preempt.h | 34 |
1 files changed, 15 insertions, 19 deletions
diff --git a/include/linux/preempt.h b/include/linux/preempt.h index 8cc0338a5e9a..37974cd4f092 100644 --- a/include/linux/preempt.h +++ b/include/linux/preempt.h @@ -10,14 +10,6 @@ #include <linux/list.h> /* - * We use the MSB mostly because its available; see <linux/preempt_mask.h> for - * the other bits -- can't include that header due to inclusion hell. - */ -#define PREEMPT_NEED_RESCHED 0x80000000 - -#include <asm/preempt.h> - -/* * We put the hardirq and softirq counter into the preemption * counter. The bitmask has the following meaning: * @@ -30,11 +22,12 @@ * there are a few palaeontologic drivers which reenable interrupts in * the handler, so we need more than one bit here. * - * PREEMPT_MASK: 0x000000ff - * SOFTIRQ_MASK: 0x0000ff00 - * HARDIRQ_MASK: 0x000f0000 - * NMI_MASK: 0x00100000 - * PREEMPT_ACTIVE: 0x00200000 + * PREEMPT_MASK: 0x000000ff + * SOFTIRQ_MASK: 0x0000ff00 + * HARDIRQ_MASK: 0x000f0000 + * NMI_MASK: 0x00100000 + * PREEMPT_ACTIVE: 0x00200000 + * PREEMPT_NEED_RESCHED: 0x80000000 */ #define PREEMPT_BITS 8 #define SOFTIRQ_BITS 8 @@ -64,6 +57,12 @@ #define PREEMPT_ACTIVE_SHIFT (NMI_SHIFT + NMI_BITS) #define PREEMPT_ACTIVE (__IRQ_MASK(PREEMPT_ACTIVE_BITS) << PREEMPT_ACTIVE_SHIFT) +/* We use the MSB mostly because its available */ +#define PREEMPT_NEED_RESCHED 0x80000000 + +/* preempt_count() and related functions, depends on PREEMPT_NEED_RESCHED */ +#include <asm/preempt.h> + #define hardirq_count() (preempt_count() & HARDIRQ_MASK) #define softirq_count() (preempt_count() & SOFTIRQ_MASK) #define irq_count() (preempt_count() & (HARDIRQ_MASK | SOFTIRQ_MASK \ @@ -122,12 +121,6 @@ #define in_atomic_preempt_off() \ ((preempt_count() & ~PREEMPT_ACTIVE) != PREEMPT_CHECK_OFFSET) -#ifdef CONFIG_PREEMPT_COUNT -# define preemptible() (preempt_count() == 0 && !irqs_disabled()) -#else -# define preemptible() 0 -#endif - #if defined(CONFIG_DEBUG_PREEMPT) || defined(CONFIG_PREEMPT_TRACER) extern void preempt_count_add(int val); extern void preempt_count_sub(int val); @@ -160,6 +153,8 @@ do { \ #define preempt_enable_no_resched() sched_preempt_enable_no_resched() +#define preemptible() (preempt_count() == 0 && !irqs_disabled()) + #ifdef CONFIG_PREEMPT #define preempt_enable() \ do { \ @@ -232,6 +227,7 @@ do { \ #define preempt_disable_notrace() barrier() #define preempt_enable_no_resched_notrace() barrier() #define preempt_enable_notrace() barrier() +#define preemptible() 0 #endif /* CONFIG_PREEMPT_COUNT */ |