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block: simplify sb_is_blkdev_sb

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Just use IS_ENABLED instead of providing a stub for !CONFIG_BLOCK.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2020-06-20 09:16:40 +02:00 • committed by Jens Axboe
parent 75362a1792
commit dd0dca223e
1 changed files with 6 additions and 12 deletions
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18
include/linux/fs.h
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@ -2557,6 +2557,12 @@ extern struct kmem_cache *names_cachep;
#define __getname() kmem_cache_alloc(names_cachep, GFP_KERNEL) #define __getname() kmem_cache_alloc(names_cachep, GFP_KERNEL)
#define __putname(name) kmem_cache_free(names_cachep, (void *)(name)) #define __putname(name) kmem_cache_free(names_cachep, (void *)(name))
extern struct super_block *blockdev_superblock;
static inline bool sb_is_blkdev_sb(struct super_block *sb)
{
return IS_ENABLED(CONFIG_BLOCK) && sb == blockdev_superblock;
}
#ifdef CONFIG_BLOCK #ifdef CONFIG_BLOCK
extern int register_blkdev(unsigned int, const char *); extern int register_blkdev(unsigned int, const char *);
extern void unregister_blkdev(unsigned int, const char *); extern void unregister_blkdev(unsigned int, const char *);
@ -2572,13 +2578,6 @@ extern struct super_block *freeze_bdev(struct block_device *);
extern void emergency_thaw_bdev(struct super_block *sb); extern void emergency_thaw_bdev(struct super_block *sb);
extern int thaw_bdev(struct block_device *bdev, struct super_block *sb); extern int thaw_bdev(struct block_device *bdev, struct super_block *sb);
extern int fsync_bdev(struct block_device *); extern int fsync_bdev(struct block_device *);
extern struct super_block *blockdev_superblock;
static inline bool sb_is_blkdev_sb(struct super_block *sb)
{
return sb == blockdev_superblock;
}
#else #else
static inline void bd_forget(struct inode *inode) {} static inline void bd_forget(struct inode *inode) {}
static inline int sync_blockdev(struct block_device *bdev) { return 0; } static inline int sync_blockdev(struct block_device *bdev) { return 0; }
@ -2602,11 +2601,6 @@ static inline int emergency_thaw_bdev(struct super_block *sb)
static inline void iterate_bdevs(void (*f)(struct block_device *, void *), void *arg) static inline void iterate_bdevs(void (*f)(struct block_device *, void *), void *arg)
{ {
} }
static inline bool sb_is_blkdev_sb(struct super_block *sb)
{
return false;
}
#endif #endif
void emergency_thaw_all(void); void emergency_thaw_all(void);
extern int sync_filesystem(struct super_block *); extern int sync_filesystem(struct super_block *);