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| author | Dave Jiang <dave.jiang@intel.com> | 2018-05-30 13:03:46 -0700 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2018-05-31 08:58:34 -0700 |
| commit | 80660f20252d6f76c9f203874ad7c7a4a8508cf8 (patch) | |
| tree | 6b34e3aff86d4455a595f37d0b2d5edc693a8bb4 /include/linux/dax.h | |
| parent | ba23cba9b3bdc967aabdc6ff1e3e9b11ce05bb4f (diff) | |
| download | lwn-80660f20252d6f76c9f203874ad7c7a4a8508cf8.tar.gz lwn-80660f20252d6f76c9f203874ad7c7a4a8508cf8.zip | |
dax: change bdev_dax_supported() to support boolean returns
The function return values are confusing with the way the function is
named. We expect a true or false return value but it actually returns
0/-errno. This makes the code very confusing. Changing the return values
to return a bool where if DAX is supported then return true and no DAX
support returns false.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'include/linux/dax.h')
| -rw-r--r-- | include/linux/dax.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/include/linux/dax.h b/include/linux/dax.h index 2a4f7295c12b..c99692ddd4b5 100644 --- a/include/linux/dax.h +++ b/include/linux/dax.h @@ -64,8 +64,8 @@ static inline bool dax_write_cache_enabled(struct dax_device *dax_dev) struct writeback_control; int bdev_dax_pgoff(struct block_device *, sector_t, size_t, pgoff_t *pgoff); #if IS_ENABLED(CONFIG_FS_DAX) -int __bdev_dax_supported(struct block_device *bdev, int blocksize); -static inline int bdev_dax_supported(struct block_device *bdev, int blocksize) +bool __bdev_dax_supported(struct block_device *bdev, int blocksize); +static inline bool bdev_dax_supported(struct block_device *bdev, int blocksize) { return __bdev_dax_supported(bdev, blocksize); } @@ -84,10 +84,10 @@ struct dax_device *fs_dax_get_by_bdev(struct block_device *bdev); int dax_writeback_mapping_range(struct address_space *mapping, struct block_device *bdev, struct writeback_control *wbc); #else -static inline int bdev_dax_supported(struct block_device *bdev, +static inline bool bdev_dax_supported(struct block_device *bdev, int blocksize) { - return -EOPNOTSUPP; + return false; } static inline struct dax_device *fs_dax_get_by_host(const char *host) |