6.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Nicholas Piggin <npiggin@xxxxxxxxx>
[ Upstream commit 750bd41aeaeb1f0e0128aa4f8fcd6dd759713641 ]
With JUMP_LABEL=n, hcall_tracepoint_refcount's address is being tested
instead of its value. This results in the tracing slowpath always being
taken unnecessarily.
Fixes: 9a10ccb29c0a2 ("powerpc/pseries: move hcall_tracepoint_refcount out of .toc")
Signed-off-by: Nicholas Piggin <npiggin@xxxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Link: https://msgid.link/20230509091600.70994-1-npiggin@xxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
arch/powerpc/platforms/pseries/hvCall.S | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/platforms/pseries/hvCall.S b/arch/powerpc/platforms/pseries/hvCall.S
index 762eb15d3bd42..fc50b9c27c1ba 100644
--- a/arch/powerpc/platforms/pseries/hvCall.S
+++ b/arch/powerpc/platforms/pseries/hvCall.S
@@ -89,6 +89,7 @@ BEGIN_FTR_SECTION; \
b 1f; \
END_FTR_SECTION(0, 1); \
LOAD_REG_ADDR(r12, hcall_tracepoint_refcount) ; \
+ ld r12,0(r12); \
std r12,32(r1); \
cmpdi r12,0; \
bne- LABEL; \
--
2.40.1
