diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/bio.h | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/include/linux/bio.h b/include/linux/bio.h index d3d75e2904ba..93ac8216aae4 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -81,8 +81,7 @@ struct bio { unsigned short bi_hw_segments; unsigned int bi_size; /* residual I/O count */ - unsigned int bi_max; /* max bvl_vecs we can hold, - used as index into pool */ + unsigned int bi_max_vecs; /* max bvl_vecs we can hold */ struct bio_vec *bi_io_vec; /* the actual vec list */ @@ -105,6 +104,14 @@ struct bio { #define bio_flagged(bio, flag) ((bio)->bi_flags & (1 << (flag))) /* + * top 4 bits of bio flags indicate the pool this bio came from + */ +#define BIO_POOL_BITS (4) +#define BIO_POOL_OFFSET (BITS_PER_LONG - BIO_POOL_BITS) +#define BIO_POOL_MASK (1UL << BIO_POOL_OFFSET) +#define BIO_POOL_IDX(bio) ((bio)->bi_flags >> BIO_POOL_OFFSET) + +/* * bio bi_rw flags * * bit 0 -- read (not set) or write (set) |