Just implement generic_fsdax_supported directly out of line instead of adding a wrapper. Given that generic_fsdax_supported is only supplied for CONFIG_FS_DAX builds this also allows to not provide it at all for !CONFIG_FS_DAX builds.
Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Dan Williams <[email protected]> --- drivers/dax/super.c | 8 ++++---- include/linux/dax.h | 16 ++-------------- 2 files changed, 6 insertions(+), 18 deletions(-) diff --git a/drivers/dax/super.c b/drivers/dax/super.c index 0f74f83101ab..8e8ccb3e956b 100644 --- a/drivers/dax/super.c +++ b/drivers/dax/super.c @@ -119,9 +119,8 @@ struct dax_device *fs_dax_get_by_bdev(struct block_device *bdev) return dax_get_by_host(bdev->bd_disk->disk_name); } EXPORT_SYMBOL_GPL(fs_dax_get_by_bdev); -#endif -bool __generic_fsdax_supported(struct dax_device *dax_dev, +bool generic_fsdax_supported(struct dax_device *dax_dev, struct block_device *bdev, int blocksize, sector_t start, sector_t sectors) { @@ -201,7 +200,8 @@ bool __generic_fsdax_supported(struct dax_device *dax_dev, } return true; } -EXPORT_SYMBOL_GPL(__generic_fsdax_supported); +EXPORT_SYMBOL_GPL(generic_fsdax_supported); +#endif /* CONFIG_FS_DAX */ /** * __bdev_dax_supported() - Check if the device supports dax for filesystem @@ -360,7 +360,7 @@ bool dax_supported(struct dax_device *dax_dev, struct block_device *bdev, return false; id = dax_read_lock(); - if (dax_alive(dax_dev)) + if (dax_alive(dax_dev) && dax_dev->ops->dax_supported) ret = dax_dev->ops->dax_supported(dax_dev, bdev, blocksize, start, len); dax_read_unlock(id); diff --git a/include/linux/dax.h b/include/linux/dax.h index 379739b55408..0a3ef9701e03 100644 --- a/include/linux/dax.h +++ b/include/linux/dax.h @@ -123,16 +123,9 @@ static inline bool bdev_dax_supported(struct block_device *bdev, int blocksize) return __bdev_dax_supported(bdev, blocksize); } -bool __generic_fsdax_supported(struct dax_device *dax_dev, +bool generic_fsdax_supported(struct dax_device *dax_dev, struct block_device *bdev, int blocksize, sector_t start, sector_t sectors); -static inline bool generic_fsdax_supported(struct dax_device *dax_dev, - struct block_device *bdev, int blocksize, sector_t start, - sector_t sectors) -{ - return __generic_fsdax_supported(dax_dev, bdev, blocksize, start, - sectors); -} static inline void fs_put_dax(struct dax_device *dax_dev) { @@ -154,12 +147,7 @@ static inline bool bdev_dax_supported(struct block_device *bdev, return false; } -static inline bool generic_fsdax_supported(struct dax_device *dax_dev, - struct block_device *bdev, int blocksize, sector_t start, - sector_t sectors) -{ - return false; -} +#define generic_fsdax_supported NULL static inline void fs_put_dax(struct dax_device *dax_dev) { -- 2.30.2
