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kernel: roundup should only reference arguments once

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Currently the roundup macro references it's arguments more than one time.
This patch changes it so it will only use its arguments once.

Suggested-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
Eric Paris 2010-10-13 17:50:08 -04:00 committed by James Morris
parent 686a0f3d71
commit b28efd54d9
1 changed files with 6 additions and 1 deletions
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7
include/linux/kernel.h
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@ -58,7 +58,12 @@ extern const char linux_proc_banner[];
#define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f)) #define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
#define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y)) #define roundup(x, y) ( \
{ \
typeof(y) __y = y; \
(((x) + (__y - 1)) / __y) * __y; \
} \
)
#define rounddown(x, y) ( \ #define rounddown(x, y) ( \
{ \ { \
typeof(x) __x = (x); \ typeof(x) __x = (x); \