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authorChristoph Hellwig <hch@lst.de>2018-11-09 09:51:00 +0100
committerChristoph Hellwig <hch@lst.de>2018-12-06 07:04:56 -0800
commit7c703e54cc71df5baa962e24a5663d88173bba5c (patch)
treecaf54e62471ee960c1143a58d246d2e63bd35616 /include/linux/scatterlist.h
parentb14b9d25a3c707c85e7e31e15766a71365b52ab7 (diff)
arch: switch the default on ARCH_HAS_SG_CHAIN
These days architectures are mostly out of the business of dealing with struct scatterlist at all, unless they have architecture specific iommu drivers. Replace the ARCH_HAS_SG_CHAIN symbol with a ARCH_NO_SG_CHAIN one only enabled for architectures with horrible legacy iommu drivers like alpha and parisc, and conditionally for arm which wants to keep it disable for legacy platforms. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Palmer Dabbelt <palmer@sifive.com>
Diffstat (limited to 'include/linux/scatterlist.h')
-rw-r--r--include/linux/scatterlist.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/include/linux/scatterlist.h b/include/linux/scatterlist.h
index 093aa57120b0..b96f0d0b5b8f 100644
--- a/include/linux/scatterlist.h
+++ b/include/linux/scatterlist.h
@@ -324,10 +324,10 @@ size_t sg_zero_buffer(struct scatterlist *sgl, unsigned int nents,
* Like SG_CHUNK_SIZE, but for archs that have sg chaining. This limit
* is totally arbitrary, a setting of 2048 will get you at least 8mb ios.
*/
-#ifdef CONFIG_ARCH_HAS_SG_CHAIN
-#define SG_MAX_SEGMENTS 2048
-#else
+#ifdef CONFIG_ARCH_NO_SG_CHAIN
#define SG_MAX_SEGMENTS SG_CHUNK_SIZE
+#else
+#define SG_MAX_SEGMENTS 2048
#endif
#ifdef CONFIG_SG_POOL