From: Richard Kennedy <richard@rsk.demon.co.uk>
Date: Thu, 25 Mar 2010 11:27:36 +0000 (+0000)
Subject: trace: Reorder struct ring_buffer_per_cpu to remove padding on 64bit
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=985023dee6e212493831431ba2e3ce8918f001b2;p=linux-beck.git

trace: Reorder struct ring_buffer_per_cpu to remove padding on 64bit

Reorder structure to remove 8 bytes of padding on 64 bit builds.
This shrinks the size to 128 bytes so allowing allocation from a smaller
slab & needed one fewer cache lines.

Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk>
LKML-Reference: <1269516456.2054.8.camel@localhost>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---

diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 28d0615a513f..3632ce87674f 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -443,6 +443,7 @@ int ring_buffer_print_page_header(struct trace_seq *s)
  */
 struct ring_buffer_per_cpu {
 	int				cpu;
+	atomic_t			record_disabled;
 	struct ring_buffer		*buffer;
 	spinlock_t			reader_lock;	/* serialize readers */
 	arch_spinlock_t			lock;
@@ -462,7 +463,6 @@ struct ring_buffer_per_cpu {
 	unsigned long			read;
 	u64				write_stamp;
 	u64				read_stamp;
-	atomic_t			record_disabled;
 };
 
 struct ring_buffer {