[Drbd-dev] [PATCH 38/42] block, fs: remove old REQ definitions.

[mchristi at redhat.com]

From: Mike Christie <mchristi at redhat.com>

We no longer use REQ_WRITE. REQ_WRITE_SAME and REQ_DISCARD,
so this patch removes them.

Signed-off-by: Mike Christie <mchristi at redhat.com>
Reviewed-by: Christoph Hellwig <hch at lst.de>
---
 include/linux/blk_types.h   | 21 ++++++---------------
 include/linux/fs.h          | 21 +++++++++++----------
 include/trace/events/f2fs.h |  1 -
 3 files changed, 17 insertions(+), 26 deletions(-)

diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index 6e49c91..b4251ed 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -151,7 +151,6 @@ struct bio {
  */
 enum rq_flag_bits {
 	/* common flags */
-	__REQ_WRITE,		/* not set, read. set, write */
 	__REQ_FAILFAST_DEV,	/* no driver retries of device errors */
 	__REQ_FAILFAST_TRANSPORT, /* no driver retries of transport errors */
 	__REQ_FAILFAST_DRIVER,	/* no driver retries of driver errors */
@@ -159,9 +158,7 @@ enum rq_flag_bits {
 	__REQ_SYNC,		/* request is sync (sync write or read) */
 	__REQ_META,		/* metadata io request */
 	__REQ_PRIO,		/* boost priority in cfq */
-	__REQ_DISCARD,		/* request to discard sectors */
-	__REQ_SECURE,		/* secure discard (used with __REQ_DISCARD) */
-	__REQ_WRITE_SAME,	/* write same block many times */
+	__REQ_SECURE,		/* secure discard (used with REQ_OP_DISCARD) */
 
 	__REQ_NOIDLE,		/* don't anticipate more IO after this one */
 	__REQ_INTEGRITY,	/* I/O includes block integrity payload */
@@ -197,28 +194,22 @@ enum rq_flag_bits {
 	__REQ_NR_BITS,		/* stops here */
 };
 
-#define REQ_WRITE		(1ULL << __REQ_WRITE)
 #define REQ_FAILFAST_DEV	(1ULL << __REQ_FAILFAST_DEV)
 #define REQ_FAILFAST_TRANSPORT	(1ULL << __REQ_FAILFAST_TRANSPORT)
 #define REQ_FAILFAST_DRIVER	(1ULL << __REQ_FAILFAST_DRIVER)
 #define REQ_SYNC		(1ULL << __REQ_SYNC)
 #define REQ_META		(1ULL << __REQ_META)
 #define REQ_PRIO		(1ULL << __REQ_PRIO)
-#define REQ_DISCARD		(1ULL << __REQ_DISCARD)
-#define REQ_WRITE_SAME		(1ULL << __REQ_WRITE_SAME)
 #define REQ_NOIDLE		(1ULL << __REQ_NOIDLE)
 #define REQ_INTEGRITY		(1ULL << __REQ_INTEGRITY)
 
 #define REQ_FAILFAST_MASK \
 	(REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | REQ_FAILFAST_DRIVER)
 #define REQ_COMMON_MASK \
-	(REQ_WRITE | REQ_FAILFAST_MASK | REQ_SYNC | REQ_META | REQ_PRIO | \
-	 REQ_DISCARD | REQ_WRITE_SAME | REQ_NOIDLE | REQ_FLUSH | REQ_FUA | \
-	 REQ_SECURE | REQ_INTEGRITY)
+	(REQ_FAILFAST_MASK | REQ_SYNC | REQ_META | REQ_PRIO | REQ_NOIDLE | \
+	 REQ_FLUSH | REQ_FUA | REQ_SECURE | REQ_INTEGRITY)
 #define REQ_CLONE_MASK		REQ_COMMON_MASK
 
-#define BIO_NO_ADVANCE_ITER_MASK	(REQ_DISCARD|REQ_WRITE_SAME)
-
 /* This mask is used for both bio and request merge checking */
 #define REQ_NOMERGE_FLAGS \
 	(REQ_NOMERGE | REQ_STARTED | REQ_SOFTBARRIER | REQ_FLUSH | REQ_FUA | REQ_FLUSH_SEQ)
@@ -250,9 +241,9 @@ enum rq_flag_bits {
 
 enum req_op {
 	REQ_OP_READ,
-	REQ_OP_WRITE		= REQ_WRITE,
-	REQ_OP_DISCARD		= REQ_DISCARD,
-	REQ_OP_WRITE_SAME	= REQ_WRITE_SAME,
+	REQ_OP_WRITE,
+	REQ_OP_DISCARD,		/* request to discard sectors */
+	REQ_OP_WRITE_SAME,	/* write same block many times */
 };
 
 typedef unsigned int blk_qc_t;
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 9becf20..509e21f 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -153,9 +153,10 @@ typedef void (dax_iodone_t)(struct buffer_head *bh_map, int uptodate);
 #define CHECK_IOVEC_ONLY -1
 
 /*
- * The below are the various read and write types that we support. Some of
+ * The below are the various read and write flags that we support. Some of
  * them include behavioral modifiers that send information down to the
- * block layer and IO scheduler. Terminology:
+ * block layer and IO scheduler. They should be used along with a req_op.
+ * Terminology:
  *
  *	The block layer uses device plugging to defer IO a little bit, in
  *	the hope that we will see more IO very shortly. This increases
@@ -194,19 +195,19 @@ typedef void (dax_iodone_t)(struct buffer_head *bh_map, int uptodate);
  *			non-volatile media on completion.
  *
  */
-#define RW_MASK			REQ_WRITE
+#define RW_MASK			REQ_OP_WRITE
 #define RWA_MASK		REQ_RAHEAD
 
-#define READ			0
+#define READ			REQ_OP_READ
 #define WRITE			RW_MASK
 #define READA			RWA_MASK
 
-#define READ_SYNC		(READ | REQ_SYNC)
-#define WRITE_SYNC		(WRITE | REQ_SYNC | REQ_NOIDLE)
-#define WRITE_ODIRECT		(WRITE | REQ_SYNC)
-#define WRITE_FLUSH		(WRITE | REQ_SYNC | REQ_NOIDLE | REQ_FLUSH)
-#define WRITE_FUA		(WRITE | REQ_SYNC | REQ_NOIDLE | REQ_FUA)
-#define WRITE_FLUSH_FUA		(WRITE | REQ_SYNC | REQ_NOIDLE | REQ_FLUSH | REQ_FUA)
+#define READ_SYNC		REQ_SYNC
+#define WRITE_SYNC		(REQ_SYNC | REQ_NOIDLE)
+#define WRITE_ODIRECT		REQ_SYNC
+#define WRITE_FLUSH		(REQ_SYNC | REQ_NOIDLE | REQ_FLUSH)
+#define WRITE_FUA		(REQ_SYNC | REQ_NOIDLE | REQ_FUA)
+#define WRITE_FLUSH_FUA		(REQ_SYNC | REQ_NOIDLE | REQ_FLUSH | REQ_FUA)
 
 /*
  * Attribute flags.  These should be or-ed together to figure out what
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index db75d69..20f708e 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -31,7 +31,6 @@ TRACE_DEFINE_ENUM(BG_GC);
 TRACE_DEFINE_ENUM(LFS);
 TRACE_DEFINE_ENUM(SSR);
 TRACE_DEFINE_ENUM(__REQ_RAHEAD);
-TRACE_DEFINE_ENUM(__REQ_WRITE);
 TRACE_DEFINE_ENUM(__REQ_SYNC);
 TRACE_DEFINE_ENUM(__REQ_NOIDLE);
 TRACE_DEFINE_ENUM(__REQ_FLUSH);
-- 
2.7.2