linux-kernel - [PATCH 4.9 12/32] objtool: Add machine_real

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Message-Id: <20190809133923.356917728@linuxfoundation.org>
Date:   Fri,  9 Aug 2019 15:45:15 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Matthias Kaehlcke <mka@...omium.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH 4.9 12/32] objtool: Add machine_real_restart() to the noreturn list

From: Josh Poimboeuf <jpoimboe@...hat.com>

commit 684fb246578b9e81fc7b4ca5c71eae22edb650b2 upstream.

machine_real_restart() is annotated as '__noreturn", so add it to the
objtool noreturn list.  This fixes the following warning with clang and
CONFIG_CC_OPTIMIZE_FOR_SIZE=y:

  arch/x86/kernel/reboot.o: warning: objtool: native_machine_emergency_restart() falls through to next function machine_power_off()

Reported-by: Matthias Kaehlcke <mka@...omium.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@...hat.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Tested-by: Matthias Kaehlcke <mka@...omium.org>
Reviewed-by: Matthias Kaehlcke <mka@...omium.org>
Link: https://lkml.kernel.org/r/791712792aa4431bdd55bf1beb33a169ddf3b4a2.1529423255.git.jpoimboe@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 tools/objtool/check.c |    1 +
 1 file changed, 1 insertion(+)

--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -165,6 +165,7 @@ static int __dead_end_function(struct ob
 		"__reiserfs_panic",
 		"lbug_with_loc",
 		"fortify_panic",
+		"machine_real_restart",
 	};
 
 	if (func->bind == STB_WEAK)