[PATCH] get_empty_filp tweaks, inline epoll_init_file()
Eliminate a handful of cache references by keeping current in a register
instead of reloading (helps x86) and avoiding the overhead of a function
call. Inlining eventpoll_init_file() saves 24 bytes. Also reorder file
initialization to make writes occur more sequentially.
Signed-off-by: Benjamin LaHaise <bcrl@linux.intel.com>
Cc: Davide Libenzi <davidel@xmailserver.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/fs/file_table.c b/fs/file_table.c
index 44fabea..bcea199 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -88,6 +88,7 @@
*/
struct file *get_empty_filp(void)
{
+ struct task_struct *tsk;
static int old_max;
struct file * f;
@@ -112,13 +113,14 @@
if (security_file_alloc(f))
goto fail_sec;
- eventpoll_init_file(f);
- atomic_set(&f->f_count, 1);
- f->f_uid = current->fsuid;
- f->f_gid = current->fsgid;
- rwlock_init(&f->f_owner.lock);
- /* f->f_version: 0 */
+ tsk = current;
INIT_LIST_HEAD(&f->f_u.fu_list);
+ atomic_set(&f->f_count, 1);
+ rwlock_init(&f->f_owner.lock);
+ f->f_uid = tsk->fsuid;
+ f->f_gid = tsk->fsgid;
+ eventpoll_init_file(f);
+ /* f->f_version: 0 */
return f;
over: