On Mon, Mar 10, 2014 at 07:10:38PM +0000, Peter Maydell wrote: > Use unsigned arithmetic for operations on the mask word > in the foreach_apic() macro, to avoid relying on undefined > behaviour when shifting into the sign bit. > > Signed-off-by: Peter Maydell <peter.mayd...@linaro.org>
Reviewed-by: Michael S. Tsirkin <m...@redhat.com> > --- > hw/intc/apic.c | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/hw/intc/apic.c b/hw/intc/apic.c > index 361ae90..e137882 100644 > --- a/hw/intc/apic.c > +++ b/hw/intc/apic.c > @@ -201,12 +201,13 @@ static void apic_external_nmi(APICCommonState *s) > > #define foreach_apic(apic, deliver_bitmask, code) \ > {\ > - int __i, __j, __mask;\ > + int __i, __j;\ > + uint32_t __mask;\ > for(__i = 0; __i < MAX_APIC_WORDS; __i++) {\ > __mask = deliver_bitmask[__i];\ > if (__mask) {\ > for(__j = 0; __j < 32; __j++) {\ > - if (__mask & (1 << __j)) {\ > + if (__mask & (1U << __j)) {\ > apic = local_apics[__i * 32 + __j];\ > if (apic) {\ > code;\ > -- > 1.9.0 >