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authorBart Van Assche <bart.vanassche@wdc.com>2018-03-14 15:48:06 -0700
committerJens Axboe <axboe@kernel.dk>2018-03-17 14:45:23 -0600
commit233bde21aa43516baa013ef7ac33f3427056db3e (patch)
treec90ab5a8f118fad728fd1506e672885834f80bb6 /drivers/nvdimm
parentec6dcf63c55c8b09b44fe5990082b07baf139c69 (diff)
block: Move SECTOR_SIZE and SECTOR_SHIFT definitions into <linux/blkdev.h>
It happens often while I'm preparing a patch for a block driver that I'm wondering: is a definition of SECTOR_SIZE and/or SECTOR_SHIFT available for this driver? Do I have to introduce definitions of these constants before I can use these constants? To avoid this confusion, move the existing definitions of SECTOR_SIZE and SECTOR_SHIFT into the <linux/blkdev.h> header file such that these become available for all block drivers. Make the SECTOR_SIZE definition in the uapi msdos_fs.h header file conditional to avoid that including that header file after <linux/blkdev.h> causes the compiler to complain about a SECTOR_SIZE redefinition. Note: the SECTOR_SIZE / SECTOR_SHIFT / SECTOR_BITS definitions have not been removed from uapi header files nor from NAND drivers in which these constants are used for another purpose than converting block layer offsets and sizes into a number of sectors. Cc: David S. Miller <davem@davemloft.net> Cc: Mike Snitzer <snitzer@redhat.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Nitin Gupta <ngupta@vflare.org> Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/nvdimm')
-rw-r--r--drivers/nvdimm/nd.h1
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h
index 8d6375ee0fda..184e070d50a2 100644
--- a/drivers/nvdimm/nd.h
+++ b/drivers/nvdimm/nd.h
@@ -29,7 +29,6 @@ enum {
* BTT instance
*/
ND_MAX_LANES = 256,
- SECTOR_SHIFT = 9,
INT_LBASIZE_ALIGNMENT = 64,
NVDIMM_IO_ATOMIC = 1,
};