mm: thp: Correct the HPAGE_PMD_ORDER check.

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All Transparent Huge Pages are allocated by the buddy allocator.

A compile time check is in place that fails when the order of a
transparent huge page is too large to be allocated by the buddy
allocator. Unfortunately that compile time check passes when:
HPAGE_PMD_ORDER == MAX_ORDER
( which is incorrect as the buddy allocator can only allocate
memory of order strictly less than MAX_ORDER. )

This patch updates the compile time check to fail in the above
case.

Signed-off-by: Steve Capper <steve.capper@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Andrew Morton <akpm@linux-foundation.org>

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This commit is contained in:

Steve Capper 2013-05-07 14:46:03 +01:00

parent 53313b2c91

commit dfa5e237e9

1 changed files with 1 additions and 1 deletions

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include/linux/huge_mm.h

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