linux-kernel - [PATCH 4.14 035/164] scsi: dma-mapping: always provide dma_get_cache

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Date:   Tue, 12 Dec 2017 13:43:35 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Christoph Hellwig <hch@....de>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Subject: [PATCH 4.14 035/164] scsi: dma-mapping: always provide dma_get_cache_alignment

4.14-stable review patch.  If anyone has any objections, please let me know.

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

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

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

--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -697,7 +697,6 @@ static inline void *dma_zalloc_coherent(
 	return ret;
 }
 
-#ifdef CONFIG_HAS_DMA
 static inline int dma_get_cache_alignment(void)
 {
 #ifdef ARCH_DMA_MINALIGN
@@ -705,7 +704,6 @@ static inline int dma_get_cache_alignmen
 #endif
 	return 1;
 }
-#endif
 
 /* flags for the coherent memory api */
 #define DMA_MEMORY_EXCLUSIVE		0x01