shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-03-24 19:40:21 +09:00
Code Issues Packages Projects Releases Wiki Activity

powerpc/pseries: Fix hcall tracepoints with JUMP_LABEL=n

Browse Source 
[ Upstream commit 750bd41aea ]

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: 9a10ccb29c ("powerpc/pseries: move hcall_tracepoint_refcount out of .toc")
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230509091600.70994-1-npiggin@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Nicholas Piggin
2023-05-09 19:15:59 +10:00
committed by Greg Kroah-Hartman
parent ebbfe48dd1
commit 4515f1676d
1 changed files with 1 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
arch/powerpc/platforms/pseries/hvCall.S
View File

@@ -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; \