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提交 a9c701e5 编写于 作者: J Jens Axboe
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block: use bio_has_data() to check for data carrying bio 

Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
上级 7a67f63b
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Showing with 2 addition and 5 deletion
block/blk-core.c
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...@@ -1490,10 +1490,7 @@ void submit_bio(int rw, struct bio *bio) ...@@ -1490,10 +1490,7 @@ void submit_bio(int rw, struct bio *bio)
* If it's a regular read/write or a barrier with data attached, * If it's a regular read/write or a barrier with data attached,
* go through the normal accounting stuff before submission. * go through the normal accounting stuff before submission.
*/ */
if (!bio_empty_barrier(bio)) { if (bio_has_data(bio)) {
BIO_BUG_ON(!bio->bi_size);
BIO_BUG_ON(!bio->bi_io_vec);
if (rw & WRITE) { if (rw & WRITE) {
count_vm_events(PGPGOUT, count); count_vm_events(PGPGOUT, count);
......
include/linux/bio.h
浏览文件 @ a9c701e5
...@@ -185,7 +185,7 @@ struct bio { ...@@ -185,7 +185,7 @@ struct bio {
#define bio_failfast(bio) ((bio)->bi_rw & (1 << BIO_RW_FAILFAST)) #define bio_failfast(bio) ((bio)->bi_rw & (1 << BIO_RW_FAILFAST))
#define bio_rw_ahead(bio) ((bio)->bi_rw & (1 << BIO_RW_AHEAD)) #define bio_rw_ahead(bio) ((bio)->bi_rw & (1 << BIO_RW_AHEAD))
#define bio_rw_meta(bio) ((bio)->bi_rw & (1 << BIO_RW_META)) #define bio_rw_meta(bio) ((bio)->bi_rw & (1 << BIO_RW_META))
#define bio_empty_barrier(bio) (bio_barrier(bio) && !(bio)->bi_size) #define bio_empty_barrier(bio) (bio_barrier(bio) && !bio_has_data(bio))
static inline unsigned int bio_cur_sectors(struct bio *bio) static inline unsigned int bio_cur_sectors(struct bio *bio)
{ {
......
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