block: move REQ_RAHEAD to common flags

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@lst.de>
Reviewed-by: Shaun Tancheff <shaun.tancheff@seagate.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index b541425..44f9bca 100644 (file)
--- 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 */