2.6.27-stable review patch. If anyone has any objections, please let us know. ------------------ From: Martin Schwidefsky commit 4fa81ed27781a12f6303b9263056635ae74e3e21 upstream. The implementation of __div64_31 for G5 machines is broken. The comments in __div64_31 are correct, only the code does not do what the comments say. The part "If the remainder has overflown subtract base and increase the quotient" is only partially realized, the base is subtracted correctly but the quotient is only increased if the dividend had the last bit set. Using the correct instruction fixes the problem. Reported-by: Frans Pop Tested-by: Frans Pop Signed-off-by: Martin Schwidefsky Signed-off-by: Greg Kroah-Hartman --- arch/s390/lib/div64.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/s390/lib/div64.c +++ b/arch/s390/lib/div64.c @@ -61,7 +61,7 @@ static uint32_t __div64_31(uint64_t *n, " clr %0,%3\n" " jl 0f\n" " slr %0,%3\n" - " alr %1,%2\n" + " ahi %1,1\n" "0:\n" : "+d" (reg2), "+d" (reg3), "=d" (tmp) : "d" (base), "2" (1UL) : "cc" ); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/