diff mbox series

[v2] powerpc: Disable kcov for slb routines.

Message ID 155178757281.3443.3188697162906543083.stgit@jupiter.in.ibm.com (mailing list archive)
State Superseded
Headers show
Series [v2] powerpc: Disable kcov for slb routines. | expand

Checks

Context Check Description
snowpatch_ozlabs/apply_patch success Successfully applied on branch next (9580b71b5a7863c24a9bd18bcd2ad759b86b1eff)
snowpatch_ozlabs/build-ppc64le success build succeeded & removed 0 sparse warning(s)
snowpatch_ozlabs/build-ppc64be success build succeeded & removed 0 sparse warning(s)
snowpatch_ozlabs/build-ppc64e success build succeeded & removed 0 sparse warning(s)
snowpatch_ozlabs/build-pmac32 success build succeeded & removed 0 sparse warning(s)
snowpatch_ozlabs/checkpatch success total: 0 errors, 0 warnings, 0 checks, 6 lines checked

Commit Message

Mahesh J Salgaonkar March 5, 2019, 12:06 p.m. UTC 
From: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>

The kcov instrumentation inside SLB routines causes duplicate SLB entries
to be added resulting into SLB multihit machine checks.
Disable kcov instrumentation on slb.o

Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Acked-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
---
Change in v2:
- Add comment as requested by Andrew
---
 arch/powerpc/mm/Makefile |    3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/arch/powerpc/mm/Makefile b/arch/powerpc/mm/Makefile
index d4d32e229ace..eb16449e694c 100644
--- a/arch/powerpc/mm/Makefile
+++ b/arch/powerpc/mm/Makefile
@@ -60,3 +60,6 @@  obj-$(CONFIG_PPC_MEM_KEYS)	+= pkeys.o
 # This is necessary for booting with kcov enabled on book3e machines
 KCOV_INSTRUMENT_tlb_nohash.o := n
 KCOV_INSTRUMENT_fsl_booke_mmu.o := n
+
+# Disable kcov instrumentation on sensitive code for book3s_64 machines
+KCOV_INSTRUMENT_slb.o := n