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| author | Chen, Kenneth W <kenneth.w.chen@intel.com> | 2006-03-22 00:09:02 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-22 07:54:04 -0800 |
| commit | bba1e9b2111b14625f670bd07e57fd7ed57ce804 (patch) | |
| tree | fc46b8702597fafde7d1a550dcbc948f173303ad /fs | |
| parent | 42b88befd6e0dae1a5fe04c03925037fa890e1f3 (diff) | |
| download | linux-bba1e9b2111b14625f670bd07e57fd7ed57ce804.tar.gz linux-bba1e9b2111b14625f670bd07e57fd7ed57ce804.tar.bz2 linux-bba1e9b2111b14625f670bd07e57fd7ed57ce804.zip | |
[PATCH] convert hugetlbfs_counter to atomic
Implementation of hugetlbfs_counter() is functionally equivalent to
atomic_inc_return(). Use the simpler atomic form.
Signed-off-by: Ken Chen <kenneth.w.chen@intel.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/hugetlbfs/inode.c | 18 |
1 files changed, 2 insertions, 16 deletions
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index 1a1c2fcb7823..25fa8bba8cb5 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -737,21 +737,6 @@ static struct file_system_type hugetlbfs_fs_type = { static struct vfsmount *hugetlbfs_vfsmount; -/* - * Return the next identifier for a shm file - */ -static unsigned long hugetlbfs_counter(void) -{ - static DEFINE_SPINLOCK(lock); - static unsigned long counter; - unsigned long ret; - - spin_lock(&lock); - ret = ++counter; - spin_unlock(&lock); - return ret; -} - static int can_do_hugetlb_shm(void) { return likely(capable(CAP_IPC_LOCK) || @@ -767,6 +752,7 @@ struct file *hugetlb_zero_setup(size_t size) struct dentry *dentry, *root; struct qstr quick_string; char buf[16]; + static atomic_t counter; if (!can_do_hugetlb_shm()) return ERR_PTR(-EPERM); @@ -775,7 +761,7 @@ struct file *hugetlb_zero_setup(size_t size) return ERR_PTR(-ENOMEM); root = hugetlbfs_vfsmount->mnt_root; - snprintf(buf, 16, "%lu", hugetlbfs_counter()); + snprintf(buf, 16, "%u", atomic_inc_return(&counter)); quick_string.name = buf; quick_string.len = strlen(quick_string.name); quick_string.hash = 0; |