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arm64: mte: fix prctl(PR_GET_TAGGED_ADDR_CTRL) if TCF0=NONE
[ Upstream commit 929c1f3 ] Previously we were always returning a tag inclusion mask of zero via PR_GET_TAGGED_ADDR_CTRL if TCF0 was set to NONE. Fix it by making the code for the NONE case match the others. Signed-off-by: Peter Collingbourne <pcc@google.com> Link: https://linux-review.googlesource.com/id/Iefbea66cf7d2b4c80b82f9639b9ea7f33f7fac53 Fixes: af5ce95 ("arm64: mte: Allow user control of the generated random tags via prctl()") Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Link: https://lore.kernel.org/r/20201203075110.2781021-1-pcc@google.com Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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