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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> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
21 lines
313 B
C
21 lines
313 B
C
#include <linux/kernel.h>
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#include <linux/gcd.h>
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#include <linux/export.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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