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ring_buffer: ring_buffer_empty{cpu}() can return boolean

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Make ring_buffer_empty() and ring_buffer_empty_cpu() return bool.

No functional change.

Link: http://lkml.kernel.org/r/1443537816-5788-5-git-send-email-bywxiaobai@163.com

Signed-off-by: Yaowei Bai <bywxiaobai@163.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Yaowei Bai 2015-09-29 22:43:32 +08:00 committed by Steven Rostedt
parent 06ca320952
commit 3d4e204d81
2 changed files with 7 additions and 7 deletions
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4
include/linux/ring_buffer.h
View File

@ -154,8 +154,8 @@ ring_buffer_swap_cpu(struct ring_buffer *buffer_a,
} }
#endif #endif
int ring_buffer_empty(struct ring_buffer *buffer); bool ring_buffer_empty(struct ring_buffer *buffer);
int ring_buffer_empty_cpu(struct ring_buffer *buffer, int cpu); bool ring_buffer_empty_cpu(struct ring_buffer *buffer, int cpu);
void ring_buffer_record_disable(struct ring_buffer *buffer); void ring_buffer_record_disable(struct ring_buffer *buffer);
void ring_buffer_record_enable(struct ring_buffer *buffer); void ring_buffer_record_enable(struct ring_buffer *buffer);

10
kernel/trace/ring_buffer.c
View File

@ -4267,7 +4267,7 @@ EXPORT_SYMBOL_GPL(ring_buffer_reset);
* rind_buffer_empty - is the ring buffer empty? * rind_buffer_empty - is the ring buffer empty?
* @buffer: The ring buffer to test * @buffer: The ring buffer to test
*/ */
int ring_buffer_empty(struct ring_buffer *buffer) bool ring_buffer_empty(struct ring_buffer *buffer)
{ {
struct ring_buffer_per_cpu *cpu_buffer; struct ring_buffer_per_cpu *cpu_buffer;
unsigned long flags; unsigned long flags;
@ -4285,10 +4285,10 @@ int ring_buffer_empty(struct ring_buffer *buffer)
local_irq_restore(flags); local_irq_restore(flags);
if (!ret) if (!ret)
return 0; return false;
} }
return 1; return true;
} }
EXPORT_SYMBOL_GPL(ring_buffer_empty); EXPORT_SYMBOL_GPL(ring_buffer_empty);
@ -4297,7 +4297,7 @@ EXPORT_SYMBOL_GPL(ring_buffer_empty);
* @buffer: The ring buffer * @buffer: The ring buffer
* @cpu: The CPU buffer to test * @cpu: The CPU buffer to test
*/ */
int ring_buffer_empty_cpu(struct ring_buffer *buffer, int cpu) bool ring_buffer_empty_cpu(struct ring_buffer *buffer, int cpu)
{ {
struct ring_buffer_per_cpu *cpu_buffer; struct ring_buffer_per_cpu *cpu_buffer;
unsigned long flags; unsigned long flags;
@ -4305,7 +4305,7 @@ int ring_buffer_empty_cpu(struct ring_buffer *buffer, int cpu)
int ret; int ret;
if (!cpumask_test_cpu(cpu, buffer->cpumask)) if (!cpumask_test_cpu(cpu, buffer->cpumask))
return 1; return true;
cpu_buffer = buffer->buffers[cpu]; cpu_buffer = buffer->buffers[cpu];
local_irq_save(flags); local_irq_save(flags);