block: allow deleting zero length partition

[linux.git] / fs / bio.c

diff --git a/fs/bio.c b/fs/bio.c
index 3cba7ae34d758c860ecff09f2be059663d2de35b..bee4deca774aa0d7b98cfbe0f989ca65a1748322 100644 (file)
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -208,14 +208,6 @@ inline int bio_phys_segments(struct request_queue *q, struct bio *bio)
        return bio->bi_phys_segments;
 }
 
-inline int bio_hw_segments(struct request_queue *q, struct bio *bio)
-{
-       if (unlikely(!bio_flagged(bio, BIO_SEG_VALID)))
-               blk_recount_segments(q, bio);
-
-       return bio->bi_hw_segments;
-}
-
 /**
  *     __bio_clone     -       clone a bio
  *     @bio: destination bio
@@ -350,8 +342,7 @@ static int __bio_add_page(struct request_queue *q, struct bio *bio, struct page
         */
 
        while (bio->bi_phys_segments >= q->max_phys_segments
-              || bio->bi_hw_segments >= q->max_hw_segments
-              || BIOVEC_VIRT_OVERSIZE(bio->bi_size)) {
+              || bio->bi_phys_segments >= q->max_hw_segments) {
 
                if (retried_segments)
                        return 0;
@@ -395,13 +386,11 @@ static int __bio_add_page(struct request_queue *q, struct bio *bio, struct page
        }
 
        /* If we may be able to merge these biovecs, force a recount */
-       if (bio->bi_vcnt && (BIOVEC_PHYS_MERGEABLE(bvec-1, bvec) ||
-           BIOVEC_VIRT_MERGEABLE(bvec-1, bvec)))
+       if (bio->bi_vcnt && (BIOVEC_PHYS_MERGEABLE(bvec-1, bvec)))
                bio->bi_flags &= ~(1 << BIO_SEG_VALID);
 
        bio->bi_vcnt++;
        bio->bi_phys_segments++;
-       bio->bi_hw_segments++;
  done:
        bio->bi_size += len;
        return len;
@@ -1383,7 +1372,6 @@ EXPORT_SYMBOL(bio_init);
 EXPORT_SYMBOL(__bio_clone);
 EXPORT_SYMBOL(bio_clone);
 EXPORT_SYMBOL(bio_phys_segments);
-EXPORT_SYMBOL(bio_hw_segments);
 EXPORT_SYMBOL(bio_add_page);
 EXPORT_SYMBOL(bio_add_pc_page);
 EXPORT_SYMBOL(bio_get_nr_vecs);