arch: add ARCH_HAS_SET_MEMORY config

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Currently, there's no good way to test for the presence of
set_memory_ro/rw/x/nx() helpers implemented by archs such as
x86, arm, arm64 and s390.

There's DEBUG_SET_MODULE_RONX and DEBUG_RODATA, however both
don't really reflect that: set_memory_*() are also available
even when DEBUG_SET_MODULE_RONX is turned off, and DEBUG_RODATA
is set by parisc, but doesn't implement above functions. Thus,
add ARCH_HAS_SET_MEMORY that is selected by mentioned archs,
where generic code can test against this.

This also allows later on to move DEBUG_SET_MODULE_RONX out of
the arch specific Kconfig to define it only once depending on
ARCH_HAS_SET_MEMORY.

Suggested-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Daniel Borkmann 2017-02-21 16:09:33 +01:00 • committed by David S. Miller

parent 559c59b238

commit d2852a2240

5 changed files with 8 additions and 0 deletions

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arch/Kconfig

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arch/arm/Kconfig

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arch/arm64/Kconfig

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arch/s390/Kconfig

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arch/x86/Kconfig

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