Re: [PATCH] kvm: selftest: fix noop test in guest_memfd_test.c

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On Thu, 2024-10-24 at 10:59 +0100, Patrick Roy wrote:
> The loop in test_create_guest_memfd_invalid that is supposed to test
> that nothing is accepted as a valid flag to KVM_CREATE_GUEST_MEMFD was
> initializing `flag` as 0 instead of BIT(0). This caused the loop to
> immediately exit instead of iterating over BIT(0), BIT(1), ... .
> 
> Fixes: 8a89efd43423 ("KVM: selftests: Add basic selftest for guest_memfd()")
> Signed-off-by: Patrick Roy <roypat@xxxxxxxxxxxx>
> ---
>  tools/testing/selftests/kvm/guest_memfd_test.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/testing/selftests/kvm/guest_memfd_test.c b/tools/testing/selftests/kvm/guest_memfd_test.c
> index ba0c8e9960358..ce687f8d248fc 100644
> --- a/tools/testing/selftests/kvm/guest_memfd_test.c
> +++ b/tools/testing/selftests/kvm/guest_memfd_test.c
> @@ -134,7 +134,7 @@ static void test_create_guest_memfd_invalid(struct kvm_vm *vm)
>  			    size);
>  	}
>  
> -	for (flag = 0; flag; flag <<= 1) {
> +	for (flag = BIT(0); flag; flag <<= 1) {
>  		fd = __vm_create_guest_memfd(vm, page_size, flag);
>  		TEST_ASSERT(fd == -1 && errno == EINVAL,
>  			    "guest_memfd() with flag '0x%lx' should fail with EINVAL",

Reviewed-by: James Gowans <jgowans@xxxxxxxxxx>




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