block: simplify I/O stat accounting

[safe/jmp/linux-2.6] / include / linux / blkdev.h

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index ba54c83..2755d5c 100644 (file)
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -118,6 +118,7 @@ enum rq_flag_bits {
        __REQ_COPY_USER,        /* contains copies of user pages */
        __REQ_INTEGRITY,        /* integrity metadata has been remapped */
        __REQ_NOIDLE,           /* Don't anticipate more IO after this one */
+       __REQ_IO_STAT,          /* account I/O stat */
        __REQ_NR_BITS,          /* stops here */
 };
 
@@ -145,6 +146,7 @@ enum rq_flag_bits {
 #define REQ_COPY_USER  (1 << __REQ_COPY_USER)
 #define REQ_INTEGRITY  (1 << __REQ_INTEGRITY)
 #define REQ_NOIDLE     (1 << __REQ_NOIDLE)
+#define REQ_IO_STAT    (1 << __REQ_IO_STAT)
 
 #define BLK_MAX_CDB    16
 
@@ -598,6 +600,7 @@ enum {
                                 blk_failfast_transport(rq) ||  \
                                 blk_failfast_driver(rq))
 #define blk_rq_started(rq)     ((rq)->cmd_flags & REQ_STARTED)
+#define blk_rq_io_stat(rq)     ((rq)->cmd_flags & REQ_IO_STAT)
 
 #define blk_account_rq(rq)     (blk_rq_started(rq) && (blk_fs_request(rq) || blk_discard_rq(rq)))