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authorLai Jiangshan <laijs@cn.fujitsu.com>2008-12-17 17:48:23 +0800
committerIngo Molnar <mingo@elte.hu>2008-12-18 13:49:56 +0100
commit6d102bc68f3dd2ae0e305b09170b1751aa67baeb (patch)
treec52f4bf881946eff6824190fd4c57bd5949319c9 /kernel/trace
parent40874491f9e9a4cb08eaf663dbe018bf5671975a (diff)
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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>
Diffstat (limited to 'kernel/trace')
-rw-r--r--kernel/trace/ring_buffer.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index eab81f918f6a..bb6922a931b1 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -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];