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Make sure the value in abs() does not get truncated if it is greater than 2^32

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abs() will truncate the input if is it outside the 2^32 range.  Fix that
by assuming `long' input.

This might generate worse code in the common case.

Signed-off-by: Rolf Eike Beer <eike-kernel@sf-tec.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Rolf Eike Beer 2009-09-22 16:44:03 -07:00 committed by Linus Torvalds
parent d7d7561c90
commit a49c59c042
1 changed files with 1 additions and 1 deletions
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include/linux/kernel.h
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@ -146,7 +146,7 @@ extern int _cond_resched(void);
#define might_sleep_if(cond) do { if (cond) might_sleep(); } while (0)
#define abs(x) ({ \
int __x = (x); \
long __x = (x); \
(__x < 0) ? -__x : __x; \
})