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| author | Bart Van Assche <bart.vanassche@wdc.com> | 2018-03-14 23:48:06 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-03-17 21:45:23 +0100 |
| commit | 233bde21aa43516baa013ef7ac33f3427056db3e (patch) | |
| tree | c90ab5a8f118fad728fd1506e672885834f80bb6 /drivers/ide/ide-cd.h | |
| parent | blk-mq-debugfs: Show more request state information (diff) | |
| download | linux-233bde21aa43516baa013ef7ac33f3427056db3e.tar.xz linux-233bde21aa43516baa013ef7ac33f3427056db3e.zip | |
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/ide/ide-cd.h')
| -rw-r--r-- | drivers/ide/ide-cd.h | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/drivers/ide/ide-cd.h b/drivers/ide/ide-cd.h index 264e822eba58..04f0f310a856 100644 --- a/drivers/ide/ide-cd.h +++ b/drivers/ide/ide-cd.h @@ -21,11 +21,7 @@ /************************************************************************/ -#define SECTOR_BITS 9 -#ifndef SECTOR_SIZE -#define SECTOR_SIZE (1 << SECTOR_BITS) -#endif -#define SECTORS_PER_FRAME (CD_FRAMESIZE >> SECTOR_BITS) +#define SECTORS_PER_FRAME (CD_FRAMESIZE >> SECTOR_SHIFT) #define SECTOR_BUFFER_SIZE (CD_FRAMESIZE * 32) /* Capabilities Page size including 8 bytes of Mode Page Header */ |