The information that am I/O is a read-ahead can be useful for drivers.
In fact the NVMe driver already checks it, even if it won't ever be set
at the moment.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
include/linux/blk_types.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index b541425..44f9bca 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -163,9 +163,9 @@ enum rq_flag_bits {
__REQ_INTEGRITY, /* I/O includes block integrity payload */
__REQ_FUA, /* forced unit access */
__REQ_PREFLUSH, /* request for cache flush */
+ __REQ_RAHEAD, /* read ahead, can fail anytime */
/* bio only flags */
- __REQ_RAHEAD, /* read ahead, can fail anytime */
__REQ_THROTTLED, /* This bio has already been subjected to
* throttling rules. Don't do it again. */
@@ -205,7 +205,7 @@ enum rq_flag_bits {
(REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | REQ_FAILFAST_DRIVER)
#define REQ_COMMON_MASK \
(REQ_FAILFAST_MASK | REQ_SYNC | REQ_META | REQ_PRIO | REQ_NOIDLE | \
- REQ_PREFLUSH | REQ_FUA | REQ_INTEGRITY | REQ_NOMERGE)
+ REQ_PREFLUSH | REQ_FUA | REQ_INTEGRITY | REQ_NOMERGE | REQ_RAHEAD)
#define REQ_CLONE_MASK REQ_COMMON_MASK
/* This mask is used for both bio and request merge checking */
--
2.1.4
--
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