The patch titled
Subject: arc: use for_each_sg()
has been added to the -mm tree. Its filename is
arc-use-for_each_sg.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/arc-use-for_each_sg.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/arc-use-for_each_sg.patch
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------------------------------------------------------
From: Akinobu Mita <akinobu.mita@xxxxxxxxx>
Subject: arc: use for_each_sg()
This replaces the plain loop over the sglist array with for_each_sg()
macro which consists of sg_next() function calls. Since arc doesn't
select ARCH_HAS_SG_CHAIN, it is not necessary to use for_each_sg() in
order to loop over each sg element. But this can help find problems with
drivers that do not properly initialize their sg tables when
CONFIG_DEBUG_SG is enabled.
Signed-off-by: Akinobu Mita <akinobu.mita@xxxxxxxxx>
Acked-by: Vineet Gupta <vgupta@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/arc/include/asm/dma-mapping.h | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff -puN arch/arc/include/asm/dma-mapping.h~arc-use-for_each_sg arch/arc/include/asm/dma-mapping.h
--- a/arch/arc/include/asm/dma-mapping.h~arc-use-for_each_sg
+++ a/arch/arc/include/asm/dma-mapping.h
@@ -178,22 +178,24 @@ dma_sync_single_range_for_device(struct
}
static inline void
-dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
+dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sglist, int nelems,
enum dma_data_direction dir)
{
int i;
+ struct scatterlist *sg;
- for (i = 0; i < nelems; i++, sg++)
+ for_each_sg(sglist, sg, nelems, i)
_dma_cache_sync((unsigned int)sg_virt(sg), sg->length, dir);
}
static inline void
-dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
- enum dma_data_direction dir)
+dma_sync_sg_for_device(struct device *dev, struct scatterlist *sglist,
+ int nelems, enum dma_data_direction dir)
{
int i;
+ struct scatterlist *sg;
- for (i = 0; i < nelems; i++, sg++)
+ for_each_sg(sglist, sg, nelems, i)
_dma_cache_sync((unsigned int)sg_virt(sg), sg->length, dir);
}
_
Patches currently in -mm which might be from akinobu.mita@xxxxxxxxx are
lib-scatterlist-fix-kerneldoc-for-sg_pcopy_tofrom_buffer.patch
lib-scatterlist-mark-input-buffer-parameters-as-const.patch
linux-next.patch
m68k-use-for_each_sg.patch
arc-use-for_each_sg.patch
metag-use-for_each_sg.patch
xtensa-use-for_each_sg.patch
mips-use-for_each_sg.patch
frv-use-for_each_sg.patch
avr32-use-for_each_sg.patch
powerpc-use-for_each_sg.patch
sparc-use-for_each_sg.patch
parisc-use-for_each_sg.patch
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