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[PATCH] get_empty_filp tweaks, inline epoll_init_file()

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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>
This commit is contained in:
Benjamin LaHaise 2006-03-23 03:01:03 -08:00 • committed by Linus Torvalds
parent 0b2fcfdb8b
commit 5a6b7951bf
3 changed files with 14 additions and 17 deletions
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8
include/linux/eventpoll.h
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@ -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) {}