mm: fix negative left shift count when PAGE_SHIFT > 20

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When PAGE_SHIFT > 20, the result of "20 - PAGE_SHIFT" is negative. The
previous calculating here will generate an unexpected result. In
addition, if PAGE_SIZE >= 1MB, The memory size of "numentries" was
already integral multiple of 1MB.

Signed-off-by: Jerry Zhou <uulinux@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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Jerry Zhou 2013-09-11 14:20:26 -07:00 • committed by Linus Torvalds

parent 3dbb95f789

commit a7e833182a

1 changed files with 4 additions and 3 deletions

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mm/page_alloc.c

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