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authorJens Axboe <axboe@kernel.dk>2019-02-27 13:13:23 -0700
committerJens Axboe <axboe@kernel.dk>2019-03-18 10:44:48 -0600
commit399254aaf4892113c806816f7e64cf40c804d46d (patch)
tree319206f280d9b57c45dfa2a42e869b25270611f4 /include
parent875f1d0769cdcfe1596ff0ca609b453359e42ec9 (diff)
block: add BIO_NO_PAGE_REF flag
If bio_iov_iter_get_pages() is called on an iov_iter that is flagged with NO_REF, then we don't need to add a page reference for the pages that we add. Add BIO_NO_PAGE_REF to track this in the bio, so IO completion knows not to drop a reference to these pages. Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include')
-rw-r--r--include/linux/blk_types.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index d66bf5f32610..791fee35df88 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -215,6 +215,7 @@ struct bio {
/*
* bio flags
*/
+#define BIO_NO_PAGE_REF 0 /* don't put release vec pages */
#define BIO_SEG_VALID 1 /* bi_phys_segments valid */
#define BIO_CLONED 2 /* doesn't own data */
#define BIO_BOUNCED 3 /* bio is a bounce bio */