diff options
Diffstat (limited to 'fs/block_dev.c')
| -rw-r--r-- | fs/block_dev.c | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c index f02b7bdd9864..ea1480a16f51 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -22,6 +22,7 @@ #include <linux/mount.h> #include <linux/uio.h> #include <linux/namei.h> +#include <linux/log2.h> #include <asm/uaccess.h> #include "internal.h" @@ -67,7 +68,7 @@ static void kill_bdev(struct block_device *bdev) int set_blocksize(struct block_device *bdev, int size) { /* Size must be a power of two, and between 512 and PAGE_SIZE */ - if (size > PAGE_SIZE || size < 512 || (size & (size-1))) + if (size > PAGE_SIZE || size < 512 || !is_power_of_2(size)) return -EINVAL; /* Size cannot be smaller than the size supported by the device */ @@ -457,17 +458,15 @@ static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flag struct bdev_inode *ei = (struct bdev_inode *) foo; struct block_device *bdev = &ei->bdev; - if (flags & SLAB_CTOR_CONSTRUCTOR) { - memset(bdev, 0, sizeof(*bdev)); - mutex_init(&bdev->bd_mutex); - sema_init(&bdev->bd_mount_sem, 1); - INIT_LIST_HEAD(&bdev->bd_inodes); - INIT_LIST_HEAD(&bdev->bd_list); + memset(bdev, 0, sizeof(*bdev)); + mutex_init(&bdev->bd_mutex); + sema_init(&bdev->bd_mount_sem, 1); + INIT_LIST_HEAD(&bdev->bd_inodes); + INIT_LIST_HEAD(&bdev->bd_list); #ifdef CONFIG_SYSFS - INIT_LIST_HEAD(&bdev->bd_holder_list); + INIT_LIST_HEAD(&bdev->bd_holder_list); #endif - inode_init_once(&ei->vfs_inode); - } + inode_init_once(&ei->vfs_inode); } static inline void __bd_forget(struct inode *inode) |