linux-kernel - [PATCH 01/16] powerpc: Replace unreachable() with it's builtin variant in WARN

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Date:   Mon,  8 Aug 2022 17:18:53 +0530
From:   Sathvika Vasireddy <sv@...ux.ibm.com>
To:     linuxppc-dev@...ts.ozlabs.org
Cc:     jpoimboe@...hat.com, peterz@...radead.org,
        linux-kernel@...r.kernel.org, aik@...abs.ru, mpe@...erman.id.au,
        mingo@...hat.com, christophe.leroy@...roup.eu, rostedt@...dmis.org,
        mbenes@...e.cz, npiggin@...il.com, chenzhongjin@...wei.com,
        linux-arm-kernel@...ts.infradead.org,
        naveen.n.rao@...ux.vnet.ibm.com, sv@...ux.ibm.com
Subject: [PATCH 01/16] powerpc: Replace unreachable() with it's builtin variant in WARN_ON()

objtool is throwing *unannotated intra-function call*
warnings with a few instructions that are marked
unreachable. Replace unreachable() with __builtin_unreachable()
to fix these warnings, as the codegen remains same
with unreachable() and __builtin_unreachable().

Signed-off-by: Sathvika Vasireddy <sv@...ux.ibm.com>
---
 arch/powerpc/include/asm/bug.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/include/asm/bug.h b/arch/powerpc/include/asm/bug.h
index 61a4736355c2..074be1a78c56 100644
--- a/arch/powerpc/include/asm/bug.h
+++ b/arch/powerpc/include/asm/bug.h
@@ -99,7 +99,7 @@
 	__label__ __label_warn_on;				\
 								\
 	WARN_ENTRY("twi 31, 0, 0", BUGFLAG_WARNING | (flags), __label_warn_on); \
-	unreachable();						\
+	__builtin_unreachable();				\
 								\
 __label_warn_on:						\
 	break;							\
-- 
2.31.1