The patch titled
fs.h: remove 8 bytes of padding from block_device on 64bit builds
has been added to the -mm tree. Its filename is
fsh-remove-8-bytes-of-padding-from-block_device-on-64bit-builds.patch
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The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: fs.h: remove 8 bytes of padding from block_device on 64bit builds
From: Richard Kennedy <richard@xxxxxxxxxxxxxxx>
Re-ordering struct block_inode to remove 8 bytes of padding on 64 bit
builds, which also shrinks bdev_inode by 8 bytes (776 -> 768) allowing it
to fit into one fewer cache lines.
Signed-off-by: Richard Kennedy <richard@xxxxxxxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/fs.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN include/linux/fs.h~fsh-remove-8-bytes-of-padding-from-block_device-on-64bit-builds include/linux/fs.h
--- a/include/linux/fs.h~fsh-remove-8-bytes-of-padding-from-block_device-on-64bit-builds
+++ a/include/linux/fs.h
@@ -659,9 +659,9 @@ struct address_space {
struct block_device {
dev_t bd_dev; /* not a kdev_t - it's a search key */
+ int bd_openers;
struct inode * bd_inode; /* will die */
struct super_block * bd_super;
- int bd_openers;
struct mutex bd_mutex; /* open/close mutex */
struct list_head bd_inodes;
void * bd_claiming;
_
Patches currently in -mm which might be from richard@xxxxxxxxxxxxxxx are
linux-next.patch
mm-mm_struct-remove-16-bytes-of-alignment-padding-on-64-bit-builds.patch
fsh-remove-8-bytes-of-padding-from-block_device-on-64bit-builds.patch
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