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| author | Jens Axboe <axboe@kernel.dk> | 2019-02-27 13:13:23 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-03-18 10:44:48 -0600 |
| commit | 399254aaf4892113c806816f7e64cf40c804d46d (patch) | |
| tree | 319206f280d9b57c45dfa2a42e869b25270611f4 /include/linux | |
| parent | 875f1d0769cdcfe1596ff0ca609b453359e42ec9 (diff) | |
| download | linux-399254aaf4892113c806816f7e64cf40c804d46d.tar.gz linux-399254aaf4892113c806816f7e64cf40c804d46d.tar.bz2 linux-399254aaf4892113c806816f7e64cf40c804d46d.zip | |
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/linux')
| -rw-r--r-- | include/linux/blk_types.h | 1 |
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 */ |