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| author | Bart Van Assche <bart.vanassche@sandisk.com> | 2016-09-14 10:44:12 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2016-09-14 08:48:26 -0600 |
| commit | 637ca77bd1f7950538956c61dcd0c2e559905dbf (patch) | |
| tree | 45c141b4940685563f86bdc5acfe80d9d0e12f98 | |
| parent | a441b0d093b3690b7cc2cb30998358904d051db4 (diff) | |
| download | op-kernel-dev-637ca77bd1f7950538956c61dcd0c2e559905dbf.zip op-kernel-dev-637ca77bd1f7950538956c61dcd0c2e559905dbf.tar.gz | |
block: Document that bio_op() uses the data type of bio.bi_opf
Make it clear that the sizeof(unsigned int) expression in BIO_OP_SHIFT
refers to the bi_opf member of struct bio.
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Damien Le Moal <damien.lemoal@hgst.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
| -rw-r--r-- | include/linux/blk_types.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h index 436f43f..1e1ef21 100644 --- a/include/linux/blk_types.h +++ b/include/linux/blk_types.h @@ -89,7 +89,7 @@ struct bio { struct bio_vec bi_inline_vecs[0]; }; -#define BIO_OP_SHIFT (8 * sizeof(unsigned int) - REQ_OP_BITS) +#define BIO_OP_SHIFT (8 * FIELD_SIZEOF(struct bio, bi_opf) - REQ_OP_BITS) #define bio_op(bio) ((bio)->bi_opf >> BIO_OP_SHIFT) #define bio_set_op_attrs(bio, op, op_flags) do { \ |
