OSDN Git Service

Merge branch 'for-linus' of git://git.kernel.dk/linux-block
authorLinus Torvalds <torvalds@linux-foundation.org>
Sun, 13 Mar 2016 04:18:54 +0000 (20:18 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Sun, 13 Mar 2016 04:18:54 +0000 (20:18 -0800)
Pull block merge fix from Jens Axboe.

This fixes the block segment counting bug and resulting sg overrun
reported by Kent Overstreet, introduced with the last block pull.

* 'for-linus' of git://git.kernel.dk/linux-block:
  block: don't optimize for non-cloned bio in bio_get_last_bvec()

include/linux/bio.h

index cb68888..88bc64f 100644 (file)
@@ -320,11 +320,6 @@ static inline void bio_get_last_bvec(struct bio *bio, struct bio_vec *bv)
        struct bvec_iter iter = bio->bi_iter;
        int idx;
 
-       if (!bio_flagged(bio, BIO_CLONED)) {
-               *bv = bio->bi_io_vec[bio->bi_vcnt - 1];
-               return;
-       }
-
        if (unlikely(!bio_multiple_segments(bio))) {
                *bv = bio_iovec(bio);
                return;