diff options
Diffstat (limited to 'mm/bounce.c')
| -rw-r--r-- | mm/bounce.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/mm/bounce.c b/mm/bounce.c index 06722c40305..e590272fe7a 100644 --- a/mm/bounce.c +++ b/mm/bounce.c @@ -14,6 +14,7 @@ #include <linux/hash.h> #include <linux/highmem.h> #include <linux/blktrace_api.h> +#include <trace/block.h> #include <asm/tlbflush.h> #define POOL_SIZE 64 @@ -21,6 +22,8 @@ static mempool_t *page_pool, *isa_page_pool; +DEFINE_TRACE(block_bio_bounce); + #ifdef CONFIG_HIGHMEM static __init int init_emergency_pool(void) { @@ -195,8 +198,13 @@ static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig, /* * irk, bounce it */ - if (!bio) - bio = bio_alloc(GFP_NOIO, (*bio_orig)->bi_vcnt); + if (!bio) { + unsigned int cnt = (*bio_orig)->bi_vcnt; + + bio = bio_alloc(GFP_NOIO, cnt); + memset(bio->bi_io_vec, 0, cnt * sizeof(struct bio_vec)); + } + to = bio->bi_io_vec + i; @@ -222,7 +230,7 @@ static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig, if (!bio) return; - blk_add_trace_bio(q, *bio_orig, BLK_TA_BOUNCE); + trace_block_bio_bounce(q, *bio_orig); /* * at least one page was bounced, fill in possible non-highmem |