aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorBenjamin LaHaise <bcrl@linux.intel.com>2006-03-23 03:01:03 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-23 07:38:17 -0800
commit5a6b7951bfcca7f45f44269ea87417c74558daf8 (patch)
treef9cc8b3f89c89802e81b37d77c6f698e373bfe51
parent0b2fcfdb8b4e7e379192f24ea2203163ddf5df1d (diff)
downloadmrst-s0i3-test-5a6b7951bfcca7f45f44269ea87417c74558daf8.tar.gz
mrst-s0i3-test-5a6b7951bfcca7f45f44269ea87417c74558daf8.tar.xz
mrst-s0i3-test-5a6b7951bfcca7f45f44269ea87417c74558daf8.zip
[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>
-rw-r--r--fs/eventpoll.c9
-rw-r--r--fs/file_table.c10
-rw-r--r--include/linux/eventpoll.h8
3 files changed, 12 insertions, 15 deletions
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index f5d69f46ba9..1c2b16fda13 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -452,15 +452,6 @@ static void ep_poll_safewake(struct poll_safewake *psw, wait_queue_head_t *wq)
}
-/* Used to initialize the epoll bits inside the "struct file" */
-void eventpoll_init_file(struct file *file)
-{
-
- INIT_LIST_HEAD(&file->f_ep_links);
- spin_lock_init(&file->f_ep_lock);
-}
-
-
/*
* This is called from eventpoll_release() to unlink files from the eventpoll
* interface. We need to have this facility to cleanup correctly files that are
diff --git a/fs/file_table.c b/fs/file_table.c
index 44fabeaa941..bcea1998b4d 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:
diff --git a/include/linux/eventpoll.h b/include/linux/eventpoll.h
index 1289f0ec4c0..1e4bdfcf83a 100644
--- a/include/linux/eventpoll.h
+++ b/include/linux/eventpoll.h
@@ -52,7 +52,12 @@ struct file;
#ifdef CONFIG_EPOLL
/* Used to initialize the epoll bits inside the "struct file" */
-void eventpoll_init_file(struct file *file);
+static inline void eventpoll_init_file(struct file *file)
+{
+ INIT_LIST_HEAD(&file->f_ep_links);
+ spin_lock_init(&file->f_ep_lock);
+}
+
/* Used to release the epoll bits inside the "struct file" */
void eventpoll_release_file(struct file *file);
@@ -85,7 +90,6 @@ static inline void eventpoll_release(struct file *file)
eventpoll_release_file(file);
}
-
#else
static inline void eventpoll_init_file(struct file *file) {}