[PATCH 3/9] block: add REQ_DRV bit

[Christoph Hellwig]

Set aside a bit in the request/bio flags for driver use.

Signed-off-by: Christoph Hellwig <h...@lst.de>
---
 include/linux/blk_types.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index acc2f3cdc2fc..7ec2ed097a8a 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -229,6 +229,9 @@ enum req_flag_bits {
        /* command specific flags for REQ_OP_WRITE_ZEROES: */
        __REQ_NOUNMAP,          /* do not free blocks when zeroing */
 
+       /* for driver use */
+       __REQ_DRV,
+
        __REQ_NR_BITS,          /* stops here */
 };
 
@@ -249,6 +252,8 @@ enum req_flag_bits {
 
 #define REQ_NOUNMAP            (1ULL << __REQ_NOUNMAP)
 
+#define REQ_DRV                        (1ULL << __REQ_DRV)
+
 #define REQ_FAILFAST_MASK \
        (REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | REQ_FAILFAST_DRIVER)
 
-- 
2.14.1