diff options
| author | Jeff Garzik <jgarzik@pobox.com> | 2005-06-27 22:50:10 -0400 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2005-06-27 22:50:10 -0400 |
| commit | aa8f6dfd355021b4dd8b74b0588fd6fd8f21b79f (patch) | |
| tree | 57ca3e27227695acbd97408eabb0f967726c3b51 /include/linux/bio.h | |
| parent | f45727d52d1581e9ff4df9d1a12a60789ad2d1eb (diff) | |
| parent | 245ac8738b0b840552d56b842e70e750d65911cc (diff) | |
Merge /spare/repo/netdev-2.6 branch 'ieee80211'
Diffstat (limited to 'include/linux/bio.h')
| -rw-r--r-- | include/linux/bio.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/bio.h b/include/linux/bio.h index 038022763f09..36ef29fa0d8b 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -22,6 +22,7 @@ #include <linux/highmem.h> #include <linux/mempool.h> +#include <linux/ioprio.h> /* Platforms may set this to teach the BIO layer about IOMMU hardware. */ #include <asm/io.h> @@ -150,6 +151,19 @@ struct bio { #define BIO_RW_SYNC 4 /* + * upper 16 bits of bi_rw define the io priority of this bio + */ +#define BIO_PRIO_SHIFT (8 * sizeof(unsigned long) - IOPRIO_BITS) +#define bio_prio(bio) ((bio)->bi_rw >> BIO_PRIO_SHIFT) +#define bio_prio_valid(bio) ioprio_valid(bio_prio(bio)) + +#define bio_set_prio(bio, prio) do { \ + WARN_ON(prio >= (1 << IOPRIO_BITS)); \ + (bio)->bi_rw &= ((1UL << BIO_PRIO_SHIFT) - 1); \ + (bio)->bi_rw |= ((unsigned long) (prio) << BIO_PRIO_SHIFT); \ +} while (0) + +/* * various member access, note that bio_data should of course not be used * on highmem page vectors */ |