Patch "scsi: dma-mapping: always provide dma_get_cache_alignment" has been added to the 4.4-stable tree

Patch "scsi: dma-mapping: always provide dma_get_cache_alignment" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    scsi: dma-mapping: always provide dma_get_cache_alignment

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     scsi-dma-mapping-always-provide-dma_get_cache_alignment.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 860dd4424f344400b491b212ee4acb3a358ba9d9 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Tue, 21 Nov 2017 14:23:37 +0100
Subject: scsi: dma-mapping: always provide dma_get_cache_alignment

From: Christoph Hellwig <hch@lst.de>

commit 860dd4424f344400b491b212ee4acb3a358ba9d9 upstream.

Provide the dummy version of dma_get_cache_alignment that always returns
1 even if CONFIG_HAS_DMA is not set, so that drivers and subsystems can
use it without ifdefs.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 include/linux/dma-mapping.h |    2 --
 1 file changed, 2 deletions(-)

--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -192,7 +192,6 @@ static inline void *dma_zalloc_coherent(
 	return ret;
 }
 
-#ifdef CONFIG_HAS_DMA
 static inline int dma_get_cache_alignment(void)
 {
 #ifdef ARCH_DMA_MINALIGN
@@ -200,7 +199,6 @@ static inline int dma_get_cache_alignmen
 #endif
 	return 1;
 }
-#endif
 
 /* flags for the coherent memory api */
 #define	DMA_MEMORY_MAP			0x01


Patches currently in stable-queue which might be from hch@lst.de are

queue-4.4/scsi-use-dma_get_cache_alignment-as-minimum-dma-alignment.patch
queue-4.4/scsi-dma-mapping-always-provide-dma_get_cache_alignment.patch
queue-4.4/scsi-libsas-align-sata_device-s-rps_resp-on-a-cacheline.patch