GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-07-12 17:42:38 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

block: provide helpers for rq_list manipulation

Browse source 
Instead of open-coding the list additions, traversal, and removal,
provide a basic set of helpers.

Suggested-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2021-10-13 07:58:52 -06:00
parent afd7de03c5
commit 013a7f9543
2 changed files with 34 additions and 14 deletions
Download patch file Download diff file Expand all files Collapse all files

29
include/linux/blkdev.h
View file

@ -1298,4 +1298,33 @@ int fsync_bdev(struct block_device *bdev);
int freeze_bdev(struct block_device *bdev);
int thaw_bdev(struct block_device *bdev);
#define rq_list_add(listptr, rq) do { \
(rq)->rq_next = *(listptr); \
*(listptr) = rq; \
} while (0)
#define rq_list_pop(listptr) \
({ \
struct request *__req = NULL; \
if ((listptr) && *(listptr)) { \
__req = *(listptr); \
*(listptr) = __req->rq_next; \
} \
__req; \
})
#define rq_list_peek(listptr) \
({ \
struct request *__req = NULL; \
if ((listptr) && *(listptr)) \
__req = *(listptr); \
__req; \
})
#define rq_list_for_each(listptr, pos) \
for (pos = rq_list_peek((listptr)); pos; pos = rq_list_next(pos)) \
#define rq_list_next(rq) (rq)->rq_next
#define rq_list_empty(list) ((list) == (struct request *) NULL)
#endif /* _LINUX_BLKDEV_H */