linux-kernel - [PATCH] block: really remove REQ_NOWAIT

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Date:   Sun, 31 May 2020 19:33:12 +0300
From:   Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
To:     linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
        Jens Axboe <axboe@...nel.dk>
Subject: [PATCH] block: really remove REQ_NOWAIT_INLINE

Commit 7b6620d7db56 ("block: remove REQ_NOWAIT_INLINE") removed it,
but some pieces left. Probably something went wrong with git merge.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
---
 include/linux/blk_types.h |    7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index 31eb92876be7..59b2e9bd9bd8 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -322,8 +322,7 @@ enum req_flag_bits {
 	__REQ_PREFLUSH,		/* request for cache flush */
 	__REQ_RAHEAD,		/* read ahead, can fail anytime */
 	__REQ_BACKGROUND,	/* background IO */
-	__REQ_NOWAIT,           /* Don't wait if request will block */
-	__REQ_NOWAIT_INLINE,	/* Return would-block error inline */
+	__REQ_NOWAIT,		/* Don't wait if request will block */
 	/*
 	 * When a shared kthread needs to issue a bio for a cgroup, doing
 	 * so synchronously can lead to priority inversions as the kthread
@@ -358,7 +357,6 @@ enum req_flag_bits {
 #define REQ_RAHEAD		(1ULL << __REQ_RAHEAD)
 #define REQ_BACKGROUND		(1ULL << __REQ_BACKGROUND)
 #define REQ_NOWAIT		(1ULL << __REQ_NOWAIT)
-#define REQ_NOWAIT_INLINE	(1ULL << __REQ_NOWAIT_INLINE)
 #define REQ_CGROUP_PUNT		(1ULL << __REQ_CGROUP_PUNT)
 
 #define REQ_NOUNMAP		(1ULL << __REQ_NOUNMAP)
@@ -452,13 +450,12 @@ static inline int op_stat_group(unsigned int op)
 
 typedef unsigned int blk_qc_t;
 #define BLK_QC_T_NONE		-1U
-#define BLK_QC_T_EAGAIN		-2U
 #define BLK_QC_T_SHIFT		16
 #define BLK_QC_T_INTERNAL	(1U << 31)
 
 static inline bool blk_qc_t_valid(blk_qc_t cookie)
 {
-	return cookie != BLK_QC_T_NONE && cookie != BLK_QC_T_EAGAIN;
+	return cookie != BLK_QC_T_NONE;
 }
 
 static inline unsigned int blk_qc_t_to_queue_num(blk_qc_t cookie)