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Diffstat (limited to 'include/linux/bio.h')
-rw-r--r--include/linux/bio.h22
1 files changed, 18 insertions, 4 deletions
diff --git a/include/linux/bio.h b/include/linux/bio.h
index bdf6ba5f7..5e963a6d7 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -32,8 +32,6 @@
/* struct bio, bio_vec and BIO_* flags are defined in blk_types.h */
#include <linux/blk_types.h>
-extern int trap_non_toi_io;
-
#define BIO_DEBUG
#ifdef BIO_DEBUG
@@ -292,7 +290,21 @@ static inline unsigned bio_segments(struct bio *bio)
* returns. and then bio would be freed memory when if (bio->bi_flags ...)
* runs
*/
-#define bio_get(bio) atomic_inc(&(bio)->bi_cnt)
+static inline void bio_get(struct bio *bio)
+{
+ bio->bi_flags |= (1 << BIO_REFFED);
+ smp_mb__before_atomic();
+ atomic_inc(&bio->__bi_cnt);
+}
+
+static inline void bio_cnt_set(struct bio *bio, unsigned int count)
+{
+ if (count != 1) {
+ bio->bi_flags |= (1 << BIO_REFFED);
+ smp_mb__before_atomic();
+ }
+ atomic_set(&bio->__bi_cnt, count);
+}
enum bip_flags {
BIP_BLOCK_INTEGRITY = 1 << 0, /* block layer owns integrity data */
@@ -415,7 +427,6 @@ static inline struct bio *bio_clone_kmalloc(struct bio *bio, gfp_t gfp_mask)
}
extern void bio_endio(struct bio *, int);
-extern void bio_endio_nodec(struct bio *, int);
struct request_queue;
extern int bio_phys_segments(struct request_queue *, struct bio *);
@@ -471,9 +482,12 @@ extern void bvec_free(mempool_t *, struct bio_vec *, unsigned int);
extern unsigned int bvec_nr_vecs(unsigned short idx);
#ifdef CONFIG_BLK_CGROUP
+int bio_associate_blkcg(struct bio *bio, struct cgroup_subsys_state *blkcg_css);
int bio_associate_current(struct bio *bio);
void bio_disassociate_task(struct bio *bio);
#else /* CONFIG_BLK_CGROUP */
+static inline int bio_associate_blkcg(struct bio *bio,
+ struct cgroup_subsys_state *blkcg_css) { return 0; }
static inline int bio_associate_current(struct bio *bio) { return -ENOENT; }
static inline void bio_disassociate_task(struct bio *bio) { }
#endif /* CONFIG_BLK_CGROUP */