diff mbox

[07/16] block: treat REQ_FUA and REQ_PREFLUSH as synchronous

Message ID 1478007617-18715-8-git-send-email-hch@lst.de (mailing list archive)
State New, archived
Headers show

Commit Message

Christoph Hellwig Nov. 1, 2016, 1:40 p.m. UTC 
Instead of requiring everyone to specify the REQ_SYNC flag aѕ well.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 include/linux/blk_types.h | 8 +++++++-
 include/linux/fs.h        | 6 +++---
 2 files changed, 10 insertions(+), 4 deletions(-)
diff mbox

Patch

diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index 3fa62ca..107d23d 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -216,9 +216,15 @@  static inline bool op_is_write(unsigned int op)
 	return (op & 1);
 }
 
+/*
+ * Reads are always treated as synchronous, as are requests with the FUA or
+ * PREFLUSH flag.  Other operations may be marked as synchronous using the
+ * REQ_SYNC flag.
+ */
 static inline bool op_is_sync(unsigned int op)
 {
-	return (op & REQ_OP_MASK) == REQ_OP_READ || (op & REQ_SYNC);
+	return (op & REQ_OP_MASK) == REQ_OP_READ ||
+		(op & (REQ_SYNC | REQ_FUA | REQ_PREFLUSH));
 }
 
 typedef unsigned int blk_qc_t;
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 5e0078f..ccedccb 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -199,9 +199,9 @@  typedef int (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
 #define READ_SYNC		0
 #define WRITE_SYNC		(REQ_SYNC | REQ_NOIDLE)
 #define WRITE_ODIRECT		REQ_SYNC
-#define WRITE_FLUSH		(REQ_SYNC | REQ_NOIDLE | REQ_PREFLUSH)
-#define WRITE_FUA		(REQ_SYNC | REQ_NOIDLE | REQ_FUA)
-#define WRITE_FLUSH_FUA		(REQ_SYNC | REQ_NOIDLE | REQ_PREFLUSH | REQ_FUA)
+#define WRITE_FLUSH		(REQ_NOIDLE | REQ_PREFLUSH)
+#define WRITE_FUA		(REQ_NOIDLE | REQ_FUA)
+#define WRITE_FLUSH_FUA		(REQ_NOIDLE | REQ_PREFLUSH | REQ_FUA)
 
 /*
  * Attribute flags.  These should be or-ed together to figure out what