fs: reorder struct inotify_device on 64bits to remove padding

Reorder struct inotify_device to remove 8 bytes of padding on 64bit
builds, reducing size to 128 bytes . Therefore allocating from a smaller
slab & using one fewer cachelines.

Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk>
----
Hi,
patch against 2.6.28-rc7.
built & tested on AMDX2 desktop.

I've not been able to send this to the listed inotify maintainers, I
just get mail failures. So I guessed filesystem was the best home for
it, hope that's ok.

regards
Richard
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/inotify_user.c b/fs/inotify_user.c
index e2425bb..400f806 100644 (file)
--- a/fs/inotify_user.c
+++ b/fs/inotify_user.c
@@ -76,10 +76,10 @@ struct inotify_device {
        struct mutex            ev_mutex;       /* protects event queue */
        struct mutex            up_mutex;       /* synchronizes watch updates */
        struct list_head        events;         /* list of queued events */
-       atomic_t                count;          /* reference count */
        struct user_struct      *user;          /* user who opened this dev */
        struct inotify_handle   *ih;            /* inotify handle */
        struct fasync_struct    *fa;            /* async notification */
+       atomic_t                count;          /* reference count */
        unsigned int            queue_size;     /* size of the queue (bytes) */
        unsigned int            event_count;    /* number of pending events */
        unsigned int            max_events;     /* maximum number of events */