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[4.19,010/131] arm64: Silence clang warning on mismatched value/register sizes

Message ID 20200428182226.500043031@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

gregkh@linuxfoundation.org April 28, 2020, 6:23 p.m. UTC 
From: Catalin Marinas <catalin.marinas@arm.com>

[ Upstream commit: 27a22fbdeedd6c5c451cf5f830d51782bf50c3a2 ]

Clang reports a warning on the __tlbi(aside1is, 0) macro expansion since
the value size does not match the register size specified in the inline
asm. Construct the ASID value using the __TLBI_VADDR() macro.

Fixes: 222fc0c8503d ("arm64: compat: Workaround Neoverse-N1 #1542419 for compat user-space")
Reported-by: Nathan Chancellor <natechancellor@gmail.com>
Cc: James Morse <james.morse@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/arm64/kernel/sys_compat.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/arch/arm64/kernel/sys_compat.c b/arch/arm64/kernel/sys_compat.c
index 5a9b220aef6cf..3ef9d0a3ac1dc 100644
--- a/arch/arm64/kernel/sys_compat.c
+++ b/arch/arm64/kernel/sys_compat.c
@@ -48,7 +48,7 @@  __do_compat_cache_op(unsigned long start, unsigned long end)
 			 * The workaround requires an inner-shareable tlbi.
 			 * We pick the reserved-ASID to minimise the impact.
 			 */
-			__tlbi(aside1is, 0);
+			__tlbi(aside1is, __TLBI_VADDR(0, 0));
 			dsb(ish);
 		}