diff options
Diffstat (limited to 'fs/dcookies.c')
| -rw-r--r-- | fs/dcookies.c | 25 |
1 files changed, 13 insertions, 12 deletions
diff --git a/fs/dcookies.c b/fs/dcookies.c index f8274a8f83bd..8749339bf4f6 100644 --- a/fs/dcookies.c +++ b/fs/dcookies.c @@ -23,6 +23,7 @@ #include <linux/mm.h> #include <linux/errno.h> #include <linux/dcookies.h> +#include <linux/mutex.h> #include <asm/uaccess.h> /* The dcookies are allocated from a kmem_cache and @@ -36,10 +37,10 @@ struct dcookie_struct { }; static LIST_HEAD(dcookie_users); -static DECLARE_MUTEX(dcookie_sem); -static kmem_cache_t * dcookie_cache; -static struct list_head * dcookie_hashtable; -static size_t hash_size; +static DEFINE_MUTEX(dcookie_mutex); +static kmem_cache_t *dcookie_cache __read_mostly; +static struct list_head *dcookie_hashtable __read_mostly; +static size_t hash_size __read_mostly; static inline int is_live(void) { @@ -114,7 +115,7 @@ int get_dcookie(struct dentry * dentry, struct vfsmount * vfsmnt, int err = 0; struct dcookie_struct * dcs; - down(&dcookie_sem); + mutex_lock(&dcookie_mutex); if (!is_live()) { err = -EINVAL; @@ -134,7 +135,7 @@ int get_dcookie(struct dentry * dentry, struct vfsmount * vfsmnt, *cookie = dcookie_value(dcs); out: - up(&dcookie_sem); + mutex_unlock(&dcookie_mutex); return err; } @@ -157,7 +158,7 @@ asmlinkage long sys_lookup_dcookie(u64 cookie64, char __user * buf, size_t len) if (!capable(CAP_SYS_ADMIN)) return -EPERM; - down(&dcookie_sem); + mutex_lock(&dcookie_mutex); if (!is_live()) { err = -EINVAL; @@ -192,7 +193,7 @@ asmlinkage long sys_lookup_dcookie(u64 cookie64, char __user * buf, size_t len) out_free: kfree(kbuf); out: - up(&dcookie_sem); + mutex_unlock(&dcookie_mutex); return err; } @@ -290,7 +291,7 @@ struct dcookie_user * dcookie_register(void) { struct dcookie_user * user; - down(&dcookie_sem); + mutex_lock(&dcookie_mutex); user = kmalloc(sizeof(struct dcookie_user), GFP_KERNEL); if (!user) @@ -302,7 +303,7 @@ struct dcookie_user * dcookie_register(void) list_add(&user->next, &dcookie_users); out: - up(&dcookie_sem); + mutex_unlock(&dcookie_mutex); return user; out_free: kfree(user); @@ -313,7 +314,7 @@ out_free: void dcookie_unregister(struct dcookie_user * user) { - down(&dcookie_sem); + mutex_lock(&dcookie_mutex); list_del(&user->next); kfree(user); @@ -321,7 +322,7 @@ void dcookie_unregister(struct dcookie_user * user) if (!is_live()) dcookie_exit(); - up(&dcookie_sem); + mutex_unlock(&dcookie_mutex); } EXPORT_SYMBOL_GPL(dcookie_register); |