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block: better packing for struct request

Keep the 32-bit CPU and cmd_type flags together to avoid holes on 64-bit
architectures.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Christoph Hellwig 9 years ago
parent
60a40096a3
commit
ca93e45347
1 changed files with 2 additions and 3 deletions
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  1. 2 3
      include/linux/blkdev.h

+ 2 - 3
include/linux/blkdev.h
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@@ -96,12 +96,11 @@ struct request {
 
 	struct request_queue *q;
 
 	struct request_queue *q;
 
 	struct blk_mq_ctx *mq_ctx;
 
 	struct blk_mq_ctx *mq_ctx;
 
 
 
-	u64 cmd_flags;
 
+	int cpu;
 
 	unsigned cmd_type;
 
 	unsigned cmd_type;
 
+	u64 cmd_flags;
 
 	unsigned long atomic_flags;
 
 	unsigned long atomic_flags;
 
 
 
-	int cpu;
 
-
 
 	/* the following two fields are internal, NEVER access directly */
 
 	/* the following two fields are internal, NEVER access directly */
 
 	unsigned int __data_len;	/* total data len */
 
 	unsigned int __data_len;	/* total data len */
 
 	sector_t __sector;		/* sector cursor */
 
 	sector_t __sector;		/* sector cursor */