[kbuild-all] Re: [PATCH] KVM: Fix steal time asm constraints in 32-bit mode

From: David Woodhouse <dwmw(a)amazon.co.uk&gt; In 64-bit mode, x86 instruction encoding allows us to use the low 8 bits of any GPR as an 8-bit operand. In 32-bit mode, however, we can only use the [abcd] registers. For which, GCC has the "q" constraint instead of the less restrictive "r". Fixes: 7e2175ebd695 ("KVM: x86: Fix recording of guest steal time / preempted status") Reported-by: kernel test robot <lkp(a)intel.com&gt; Signed-off-by: David Woodhouse <dwmw(a)amazon.co.uk&gt; --- arch/x86/kvm/x86.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 8f156905ae38..0a689bb62e9e 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -3307,7 +3307,7 @@ static void record_steal_time(struct kvm_vcpu *vcpu) "xor %1, %1\n" "2:\n" _ASM_EXTABLE_UA(1b, 2b) - : "+r" (st_preempted), + : "+q" (st_preempted), "+&r" (err) : "m" (st->preempted)); if (err)