Skip to content

L
linux-davinci
Commit 7a67f63b authored by Jens Axboe's avatar Jens Axboe
Browse files
Options

block: add bio_has_data() to detect whether a bio carries data or not 

Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
parent 35e396cd
Hide whitespace changes
Inline Side-by-side
Showing with 8 additions and 0 deletions
include/linux/bio.h
View file @ 7a67f63b
...@@ -445,6 +445,14 @@ static inline char *__bio_kmap_irq(struct bio *bio, unsigned short idx, ...@@ -445,6 +445,14 @@ static inline char *__bio_kmap_irq(struct bio *bio, unsigned short idx,
__bio_kmap_irq((bio), (bio)->bi_idx, (flags)) __bio_kmap_irq((bio), (bio)->bi_idx, (flags))
#define bio_kunmap_irq(buf,flags) __bio_kunmap_irq(buf, flags) #define bio_kunmap_irq(buf,flags) __bio_kunmap_irq(buf, flags)
/*
* Check whether this bio carries any data or not. A NULL bio is allowed.
*/
static inline int bio_has_data(struct bio *bio)
{
return bio && bio->bi_io_vec != NULL;
}
#if defined(CONFIG_BLK_DEV_INTEGRITY) #if defined(CONFIG_BLK_DEV_INTEGRITY)
#define bip_vec_idx(bip, idx) (&(bip->bip_vec[(idx)])) #define bip_vec_idx(bip, idx) (&(bip->bip_vec[(idx)]))
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment