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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Jun 24, 2019 at 04:33:00PM +0200, Andrey Konovalov wrote: > --- /dev/null > +++ b/tools/testing/selftests/arm64/tags_test.c > @@ -0,0 +1,29 @@ > +// SPDX-License-Identifier: GPL-2.0 > + > +#include > +#include > +#include > +#include > +#include > +#include > + > +#define SHIFT_TAG(tag) ((uint64_t)(tag) << 56) > +#define SET_TAG(ptr, tag) (((uint64_t)(ptr) & ~SHIFT_TAG(0xff)) | \ > + SHIFT_TAG(tag)) > + > +int main(void) > +{ > + static int tbi_enabled = 0; > + struct utsname *ptr, *tagged_ptr; > + int err; > + > + if (prctl(PR_SET_TAGGED_ADDR_CTRL, PR_TAGGED_ADDR_ENABLE, 0, 0, 0) == 0) > + tbi_enabled = 1; Nitpick: with the latest prctl() patch, you can skip the last three arguments as they are ignored. Either way: Reviewed-by: Catalin Marinas _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel