ARM: Allow SoCs to enable scatterlist chaining
Allow SoCs to enable the scatterlist chaining support, which allows scatterlist tables to be broken up into smaller allocations. As support for this feature depends on the implementation details of the users of the scatterlists, we can't enable this globally without auditing all the users, which is a very big task. Instead, let SoCs progressively switch over to using this. SoC drivers using scatterlists and SoC DMA implementations need auditing before this option can be enabled for the SoC. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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@ -37,6 +37,9 @@ config ARM
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Europe. There is an ARM Linux project with a web page at
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<http://www.arm.linux.org.uk/>.
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config ARM_HAS_SG_CHAIN
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bool
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config HAVE_PWM
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bool
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@ -1,6 +1,10 @@
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#ifndef _ASMARM_SCATTERLIST_H
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#define _ASMARM_SCATTERLIST_H
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#ifdef CONFIG_ARM_HAS_SG_CHAIN
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#define ARCH_HAS_SG_CHAIN
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#endif
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#include <asm/memory.h>
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#include <asm/types.h>
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#include <asm-generic/scatterlist.h>
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