From ee19cc406d4c0ae3118f59e000984d935b372871 Mon Sep 17 00:00:00 2001 From: Miklos Szeredi Date: Thu, 7 Jul 2011 13:06:09 +0200 Subject: [PATCH] fs: locks: remove init_once From: Miklos Szeredi Remove SLAB initialization entirely, as suggested by Bruce and Linus. Allocate with __GFP_ZERO instead and only initialize list heads. Signed-off-by: Miklos Szeredi Signed-off-by: J. Bruce Fields --- fs/locks.c | 41 ++++++++++------------------------------- 1 file changed, 10 insertions(+), 31 deletions(-) diff --git a/fs/locks.c b/fs/locks.c index b286539d547a..7ddab3f9df07 100644 --- a/fs/locks.c +++ b/fs/locks.c @@ -160,26 +160,20 @@ EXPORT_SYMBOL_GPL(unlock_flocks); static struct kmem_cache *filelock_cache __read_mostly; -static void locks_init_lock_always(struct file_lock *fl) +static void locks_init_lock_heads(struct file_lock *fl) { - fl->fl_next = NULL; - fl->fl_fasync = NULL; - fl->fl_owner = NULL; - fl->fl_pid = 0; - fl->fl_nspid = NULL; - fl->fl_file = NULL; - fl->fl_flags = 0; - fl->fl_type = 0; - fl->fl_start = fl->fl_end = 0; + INIT_LIST_HEAD(&fl->fl_link); + INIT_LIST_HEAD(&fl->fl_block); + init_waitqueue_head(&fl->fl_wait); } /* Allocate an empty lock structure. */ struct file_lock *locks_alloc_lock(void) { - struct file_lock *fl = kmem_cache_alloc(filelock_cache, GFP_KERNEL); + struct file_lock *fl = kmem_cache_zalloc(filelock_cache, GFP_KERNEL); if (fl) - locks_init_lock_always(fl); + locks_init_lock_heads(fl); return fl; } @@ -215,27 +209,12 @@ EXPORT_SYMBOL(locks_free_lock); void locks_init_lock(struct file_lock *fl) { - INIT_LIST_HEAD(&fl->fl_link); - INIT_LIST_HEAD(&fl->fl_block); - init_waitqueue_head(&fl->fl_wait); - fl->fl_ops = NULL; - fl->fl_lmops = NULL; - locks_init_lock_always(fl); + memset(fl, 0, sizeof(struct file_lock)); + locks_init_lock_heads(fl); } EXPORT_SYMBOL(locks_init_lock); -/* - * Initialises the fields of the file lock which are invariant for - * free file_locks. - */ -static void init_once(void *foo) -{ - struct file_lock *lock = (struct file_lock *) foo; - - locks_init_lock(lock); -} - static void locks_copy_private(struct file_lock *new, struct file_lock *fl) { if (fl->fl_ops) { @@ -2333,8 +2312,8 @@ EXPORT_SYMBOL(lock_may_write); static int __init filelock_init(void) { filelock_cache = kmem_cache_create("file_lock_cache", - sizeof(struct file_lock), 0, SLAB_PANIC, - init_once); + sizeof(struct file_lock), 0, SLAB_PANIC, NULL); + return 0; } -- 2.30.2