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authorMikulas Patocka <mpatocka@redhat.com>2008-08-15 10:20:02 +0200
committerJens Axboe <jens.axboe@oracle.com>2008-10-09 08:56:03 +0200
commit5df97b91b5d7ed426034fcc84cb6e7cf682b8838 (patch)
tree727b9fb778f72d2b1ff44c007fb5209bacf67f4a /include
parentb8b3e16cfe6435d961f6aaebcfd52a1ff2a988c5 (diff)
downloadop-kernel-dev-5df97b91b5d7ed426034fcc84cb6e7cf682b8838.zip
op-kernel-dev-5df97b91b5d7ed426034fcc84cb6e7cf682b8838.tar.gz
drop vmerge accounting
Remove hw_segments field from struct bio and struct request. Without virtual merge accounting they have no purpose. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/bio.h16
-rw-r--r--include/linux/blkdev.h7
2 files changed, 1 insertions, 22 deletions
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 894d16c..dfc3556 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -77,21 +77,8 @@ struct bio {
*/
unsigned short bi_phys_segments;
- /* Number of segments after physical and DMA remapping
- * hardware coalescing is performed.
- */
- unsigned short bi_hw_segments;
-
unsigned int bi_size; /* residual I/O count */
- /*
- * To keep track of the max hw size, we account for the
- * sizes of the first and last virtually mergeable segments
- * in this bio
- */
- unsigned int bi_hw_front_size;
- unsigned int bi_hw_back_size;
-
unsigned int bi_max_vecs; /* max bvl_vecs we can hold */
struct bio_vec *bi_io_vec; /* the actual vec list */
@@ -113,7 +100,7 @@ struct bio {
#define BIO_UPTODATE 0 /* ok after I/O completion */
#define BIO_RW_BLOCK 1 /* RW_AHEAD set, and read/write would block */
#define BIO_EOF 2 /* out-out-bounds error */
-#define BIO_SEG_VALID 3 /* nr_hw_seg valid */
+#define BIO_SEG_VALID 3 /* bi_phys_segments valid */
#define BIO_CLONED 4 /* doesn't own data */
#define BIO_BOUNCED 5 /* bio is a bounce bio */
#define BIO_USER_MAPPED 6 /* contains user pages */
@@ -324,7 +311,6 @@ extern void bio_free(struct bio *, struct bio_set *);
extern void bio_endio(struct bio *, int);
struct request_queue;
extern int bio_phys_segments(struct request_queue *, struct bio *);
-extern int bio_hw_segments(struct request_queue *, struct bio *);
extern void __bio_clone(struct bio *, struct bio *);
extern struct bio *bio_clone(struct bio *, gfp_t);
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 490ce45..1adb038 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -189,13 +189,6 @@ struct request {
*/
unsigned short nr_phys_segments;
- /* Number of scatter-gather addr+len pairs after
- * physical and DMA remapping hardware coalescing is performed.
- * This is the number of scatter-gather entries the driver
- * will actually have to deal with after DMA mapping is done.
- */
- unsigned short nr_hw_segments;
-
unsigned short ioprio;
void *special;
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