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NOMMU: Optimise away the {dac_,}mmap_min_addr tests

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In NOMMU mode clamp dac_mmap_min_addr to zero to cause the tests on it to be
skipped by the compiler.  We do this as the minimum mmap address doesn't make
any sense in NOMMU mode.

mmap_min_addr and round_hint_to_min() can be discarded entirely in NOMMU mode.

Signed-off-by: David Howells <[email protected]>
Acked-by: Eric Paris <[email protected]>
Signed-off-by: James Morris <[email protected]>
This commit is contained in:
David Howells 2009-12-15 19:27:45 +00:00 • committed by James Morris
commit 6e14154676
4 changed files with 12 additions and 1 deletions
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1
mm/Kconfig
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@ -221,6 +221,7 @@ config KSM
config DEFAULT_MMAP_MIN_ADDR
int "Low address space to protect from user allocation"
depends on MMU
default 4096
help
This is the portion of low virtual memory which should be protected