[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>

1 files changed, 6 insertions, 4 deletions

diff --git a/fs/file_table.c b/fs/file_table.c
index 44fabeaa9415..bcea1998b4de 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -88,6 +88,7 @@ int proc_nr_files(ctl_table *table, int write, struct file *filp,
  */
 struct file *get_empty_filp(void)
 {
+        struct task_struct *tsk;
         static int old_max;
         struct file * f;
 
@@ -112,13 +113,14 @@ struct file *get_empty_filp(void)
         if (security_file_alloc(f))
                 goto fail_sec;
 
-        eventpoll_init_file(f);
+        tsk = current;
+        INIT_LIST_HEAD(&f->f_u.fu_list);
         atomic_set(&f->f_count, 1);
-        f->f_uid = current->fsuid;
-        f->f_gid = current->fsgid;
         rwlock_init(&f->f_owner.lock);
+        f->f_uid = tsk->fsuid;
+        f->f_gid = tsk->fsgid;
+        eventpoll_init_file(f);
         /* f->f_version: 0 */
-        INIT_LIST_HEAD(&f->f_u.fu_list);
         return f;
 
 over: