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7151b69f69
commit e96875677f upstream.
Account for all properties when a and/or b are 0:
gcd(0, 0) = 0
gcd(a, 0) = a
gcd(0, b) = b
Fixes no known problems in current kernels.
Signed-off-by: Davidlohr Bueso <dave@gnu.org>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
22 lines
313 B
C
22 lines
313 B
C
#include <linux/kernel.h>
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#include <linux/gcd.h>
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#include <linux/module.h>
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/* Greatest common divisor */
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unsigned long gcd(unsigned long a, unsigned long b)
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{
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unsigned long r;
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if (a < b)
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swap(a, b);
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if (!b)
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return a;
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while ((r = a % b) != 0) {
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a = b;
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b = r;
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}
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return b;
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}
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EXPORT_SYMBOL_GPL(gcd);
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