linux-kernel - [PATCH 3.16 076/328] block: move bio_integrity

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Date:   Sun, 09 Dec 2018 21:50:33 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, "Jens Axboe" <axboe@...nel.dk>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        "Greg Edwards" <gedwards@....com>
Subject: [PATCH 3.16 076/328] block: move bio_integrity_{intervals,bytes}
 into blkdev.h

3.16.62-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Greg Edwards <gedwards@....com>

commit 359f642700f2ff05d9c94cd9216c97af7b8e9553 upstream.

This allows bio_integrity_bytes() to be called from drivers instead of
open coding it.

Acked-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Greg Edwards <gedwards@....com>
Signed-off-by: Jens Axboe <axboe@...nel.dk>
[bwh: Backported to 3.16: bio_integrity_intervals() was called
 bio_integrity_hw_sectors() and had a different implementation.  Move it
 without renaming.]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 block/bio-integrity.c  | 22 ----------------------
 include/linux/blkdev.h | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+), 22 deletions(-)

--- a/block/bio-integrity.c
+++ b/block/bio-integrity.c
@@ -194,32 +194,6 @@ int bio_integrity_enabled(struct bio *bi
 EXPORT_SYMBOL(bio_integrity_enabled);
 
 /**
- * bio_integrity_hw_sectors - Convert 512b sectors to hardware ditto
- * @bi:		blk_integrity profile for device
- * @sectors:	Number of 512 sectors to convert
- *
- * Description: The block layer calculates everything in 512 byte
- * sectors but integrity metadata is done in terms of the hardware
- * sector size of the storage device.  Convert the block layer sectors
- * to physical sectors.
- */
-static inline unsigned int bio_integrity_hw_sectors(struct blk_integrity *bi,
-						    unsigned int sectors)
-{
-	/* At this point there are only 512b or 4096b DIF/EPP devices */
-	if (bi->sector_size == 4096)
-		return sectors >>= 3;
-
-	return sectors;
-}
-
-static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi,
-					       unsigned int sectors)
-{
-	return bio_integrity_hw_sectors(bi, sectors) * bi->tuple_size;
-}
-
-/**
  * bio_integrity_tag_size - Retrieve integrity tag space
  * @bio:	bio to inspect
  *
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1542,6 +1542,32 @@ queue_max_integrity_segments(struct requ
 	return q->limits.max_integrity_segments;
 }
 
+/**
+ * bio_integrity_hw_sectors - Convert 512b sectors to hardware ditto
+ * @bi:		blk_integrity profile for device
+ * @sectors:	Number of 512 sectors to convert
+ *
+ * Description: The block layer calculates everything in 512 byte
+ * sectors but integrity metadata is done in terms of the hardware
+ * sector size of the storage device.  Convert the block layer sectors
+ * to physical sectors.
+ */
+static inline unsigned int bio_integrity_hw_sectors(struct blk_integrity *bi,
+						    unsigned int sectors)
+{
+	/* At this point there are only 512b or 4096b DIF/EPP devices */
+	if (bi->sector_size == 4096)
+		return sectors >>= 3;
+
+	return sectors;
+}
+
+static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi,
+					       unsigned int sectors)
+{
+	return bio_integrity_hw_sectors(bi, sectors) * bi->tuple_size;
+}
+
 #else /* CONFIG_BLK_DEV_INTEGRITY */
 
 struct bio;
@@ -1608,6 +1634,18 @@ static inline bool blk_integrity_is_init
 {
 	return 0;
 }
+
+static inline unsigned int bio_integrity_hw_sectors(struct blk_integrity *bi,
+						   unsigned int sectors)
+{
+	return 0;
+}
+
+static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi,
+					       unsigned int sectors)
+{
+	return 0;
+}
 
 #endif /* CONFIG_BLK_DEV_INTEGRITY */