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authorSteven Rostedt <srostedt@redhat.com>2009-06-17 14:03:44 -0400
committerSteven Rostedt <rostedt@goodmis.org>2009-06-17 14:16:07 -0400
commit0dcd4d6c3e5b17ccf88d41cb354bb4d57cb18cbf (patch)
tree4798b2172902f8ce4dc81856ee1d858909147824 /kernel
parentc6a9d7b55e2df63de012a9a285bf2a0bee8e4d59 (diff)
ring-buffer: remove useless compile check for buffer_page size
The original version of the ring buffer had a hack to map the page struct that held the pages of the buffer to also be the structure that the ring buffer would keep the pages in a link list. This overlap of the page struct was very dangerous and that hack was removed a while ago. But there was a check to make sure the buffer_page never became bigger than the page struct, and would fail the compile if it did. The check was only meaningful when we had the hack. Now that we have separate allocated descriptors for the buffer pages, we can remove this check. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/trace/ring_buffer.c11
1 files changed, 0 insertions, 11 deletions
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 6cf340e1a4a..162da2305cb 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -620,12 +620,6 @@ static void rb_free_cpu_buffer(struct ring_buffer_per_cpu *cpu_buffer)
kfree(cpu_buffer);
}
-/*
- * Causes compile errors if the struct buffer_page gets bigger
- * than the struct page.
- */
-extern int ring_buffer_page_too_big(void);
-
#ifdef CONFIG_HOTPLUG_CPU
static int rb_cpu_notify(struct notifier_block *self,
unsigned long action, void *hcpu);
@@ -648,11 +642,6 @@ struct ring_buffer *__ring_buffer_alloc(unsigned long size, unsigned flags,
int bsize;
int cpu;
- /* Paranoid! Optimizes out when all is well */
- if (sizeof(struct buffer_page) > sizeof(struct page))
- ring_buffer_page_too_big();
-
-
/* keep it in its own cache line */
buffer = kzalloc(ALIGN(sizeof(*buffer), cache_line_size()),
GFP_KERNEL);