Subject: [PATCH AUTOSEL 5.15 2/3] powerpc/kasan: Disable KCOV in KASAN code

From: Sasha Levin <[email-masked]>
Date: Thu, 3 Aug 2023 09:04:37 -0400

From: Benjamin Gray <[email-masked]>

[ Upstream commit ccb381e1af1ace292153c88eb1fffa5683d16a20 ]

As per the generic KASAN code in mm/kasan, disable KCOV with
KCOV_INSTRUMENT := n in the makefile.

This fixes a ppc64 boot hang when KCOV and KASAN are enabled.
kasan_early_init() gets called before a PACA is initialised, but the
KCOV hook expects a valid PACA.

Suggested-by: Christophe Leroy <[email-masked]>
Signed-off-by: Benjamin Gray <[email-masked]>
Signed-off-by: Michael Ellerman <[email-masked]>
Link: https://msgid.link/[email-masked]
Signed-off-by: Sasha Levin <[email-masked]>
---
 arch/powerpc/mm/kasan/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/mm/kasan/Makefile b/arch/powerpc/mm/kasan/Makefile
index bb1a5408b86b2..8636b17c6a20f 100644
--- a/arch/powerpc/mm/kasan/Makefile
+++ b/arch/powerpc/mm/kasan/Makefile
@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 
 KASAN_SANITIZE := n
+KCOV_INSTRUMENT := n
 
 obj-$(CONFIG_PPC32)           += kasan_init_32.o
 obj-$(CONFIG_PPC_8xx)		+= 8xx.o
-- 
2.40.1