diff options
| author |   Benjamin LaHaise <bcrl@linux.intel.com> | 2006-03-23 03:01:03 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-23 07:38:17 -0800 |
| commit | 5a6b7951bfcca7f45f44269ea87417c74558daf8 (patch) | |
| tree | f9cc8b3f89c89802e81b37d77c6f698e373bfe51 | |
| parent | [PATCH] atomic: add_unless cmpxchg optimise (diff) | |
| download | linux-dev-5a6b7951bfcca7f45f44269ea87417c74558daf8.tar.xz linux-dev-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.c | 9 | ||||
| -rw-r--r-- | fs/file_table.c | 10 | ||||
| -rw-r--r-- | include/linux/eventpoll.h | 8 |
3 files changed, 12 insertions, 15 deletions
diff --git a/fs/eventpoll.c b/fs/eventpoll.c index f5d69f46ba9b..1c2b16fda13a 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 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: diff --git a/include/linux/eventpoll.h b/include/linux/eventpoll.h index 1289f0ec4c00..1e4bdfcf83a2 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) {} |