This macro is needed when one multipage bvec based bio is converted to singlepage bvec based bio, for example, bio bounce requires singlepage bvec.
Signed-off-by: Ming Lei <tom.leim...@gmail.com> --- include/linux/bio.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/include/linux/bio.h b/include/linux/bio.h index 8634bd24984c..fa71f6a57f81 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -40,6 +40,9 @@ #define BIO_MAX_PAGES 256 +/* Max sectors of bio with singlepage bvec */ +#define BIO_SP_MAX_SECTORS (BIO_MAX_PAGES * (PAGE_SIZE >> 9)) + #define bio_prio(bio) (bio)->bi_ioprio #define bio_set_prio(bio, prio) ((bio)->bi_ioprio = prio) -- 2.7.4
