1 files changed, 31 insertions, 4 deletions
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 7b1cf4ba0902..275c91c99516 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -38,7 +38,15 @@
 #define BIO_BUG_ON
 #endif
 
+#ifdef CONFIG_THP_SWAP
+#if HPAGE_PMD_NR > 256
+#define BIO_MAX_PAGES		HPAGE_PMD_NR
+#else
 #define BIO_MAX_PAGES		256
+#endif
+#else
+#define BIO_MAX_PAGES		256
+#endif
 
 #define bio_prio(bio)			(bio)->bi_ioprio
 #define bio_set_prio(bio, prio)		((bio)->bi_ioprio = prio)
@@ -463,10 +471,11 @@ extern struct bio *bio_copy_kern(struct request_queue *, void *, unsigned int,
 extern void bio_set_pages_dirty(struct bio *bio);
 extern void bio_check_pages_dirty(struct bio *bio);
 
-void generic_start_io_acct(int rw, unsigned long sectors,
-			   struct hd_struct *part);
-void generic_end_io_acct(int rw, struct hd_struct *part,
-			 unsigned long start_time);
+void generic_start_io_acct(struct request_queue *q, int rw,
+				unsigned long sectors, struct hd_struct *part);
+void generic_end_io_acct(struct request_queue *q, int rw,
+				struct hd_struct *part,
+				unsigned long start_time);
 
 #ifndef ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE
 # error	"You should define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE for your platform"
@@ -493,6 +502,24 @@ extern struct bio_vec *bvec_alloc(gfp_t, int, unsigned long *, mempool_t *);
 extern void bvec_free(mempool_t *, struct bio_vec *, unsigned int);
 extern unsigned int bvec_nr_vecs(unsigned short idx);
 
+#define bio_set_dev(bio, bdev) 			\
+do {						\
+	(bio)->bi_disk = (bdev)->bd_disk;	\
+	(bio)->bi_partno = (bdev)->bd_partno;	\
+} while (0)
+
+#define bio_copy_dev(dst, src)			\
+do {						\
+	(dst)->bi_disk = (src)->bi_disk;	\
+	(dst)->bi_partno = (src)->bi_partno;	\
+} while (0)
+
+#define bio_dev(bio) \
+	disk_devt((bio)->bi_disk)
+
+#define bio_devname(bio, buf) \
+	__bdevname(bio_dev(bio), (buf))
+
 #ifdef CONFIG_BLK_CGROUP
 int bio_associate_blkcg(struct bio *bio, struct cgroup_subsys_state *blkcg_css);
 int bio_associate_current(struct bio *bio);