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 4.9-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-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 860dd4424f344400b491b212ee4acb3a358ba9d9 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@xxxxxx>
Date: Tue, 21 Nov 2017 14:23:37 +0100
Subject: scsi: dma-mapping: always provide dma_get_cache_alignment
From: Christoph Hellwig <hch@xxxxxx>
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@xxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
include/linux/dma-mapping.h | 2 --
1 file changed, 2 deletions(-)
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -659,7 +659,6 @@ static inline void *dma_zalloc_coherent(
return ret;
}
-#ifdef CONFIG_HAS_DMA
static inline int dma_get_cache_alignment(void)
{
#ifdef ARCH_DMA_MINALIGN
@@ -667,7 +666,6 @@ 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@xxxxxx are
queue-4.9/scsi-use-dma_get_cache_alignment-as-minimum-dma-alignment.patch
queue-4.9/scsi-dma-mapping-always-provide-dma_get_cache_alignment.patch
queue-4.9/scsi-libsas-align-sata_device-s-rps_resp-on-a-cacheline.patch