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Commit 637ca77b authored by Bart Van Assche's avatar Bart Van Assche Committed by Jens Axboe
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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: default avatarBart 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: default avatarJohannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent a441b0d0

include/linux/blk_types.h

+1 −1
Original line number Diff line number Diff line
@@ -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 {		\