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tracing/ring-buffer: remove unused ring_buffer size 

Impact: remove dead code

struct ring_buffer.size is not set after ring_buffer is initialized
or resized. it is always 0.

we can use "buffer->pages * PAGE_SIZE" to get ring_buffer's size

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Lai Jiangshan 2008-12-17 17:48:23 +08:00 committed by Ingo Molnar
parent 40874491f9
commit 6d102bc68f
1 changed files with 1 additions and 3 deletions
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4
kernel/trace/ring_buffer.c
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@ -258,7 +258,6 @@ struct ring_buffer_per_cpu {
};
struct ring_buffer {
unsigned long size;
unsigned pages;
unsigned flags;
int cpus;
@ -2210,8 +2209,7 @@ int ring_buffer_swap_cpu(struct ring_buffer *buffer_a,
return -EINVAL;
/* At least make sure the two buffers are somewhat the same */
if (buffer_a->size != buffer_b->size ||
buffer_a->pages != buffer_b->pages)
if (buffer_a->pages != buffer_b->pages)
return -EINVAL;
cpu_buffer_a = buffer_a->buffers[cpu];