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arch: switch the default on ARCH_HAS_SG_CHAIN

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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 <[email protected]>
Reviewed-by: Palmer Dabbelt <[email protected]>
This commit is contained in:
Christoph Hellwig 2018-11-09 09:51:00 +01:00
commit 7c703e54cc
15 changed files with 8 additions and 47 deletions
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lib/Kconfig
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@ -577,7 +577,7 @@ config SG_POOL
# sg chaining option
#
config ARCH_HAS_SG_CHAIN
config ARCH_NO_SG_CHAIN
def_bool n
config ARCH_HAS_PMEM_API