linux-kernel - [PATCH AUTOSEL 5.15 53/68] x86/boot: Mark prepare_command_line() _

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Date:   Tue, 30 Nov 2021 09:46:49 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Borislav Petkov <bp@...e.de>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Peter Zijlstra <peterz@...radead.org>,
        Sasha Levin <sashal@...nel.org>, tglx@...utronix.de,
        mingo@...hat.com, bp@...en8.de, dave.hansen@...ux.intel.com,
        x86@...nel.org, rppt@...nel.org, akpm@...ux-foundation.org,
        rafael.j.wysocki@...el.com, david@...hat.com,
        andriy.shevchenko@...ux.intel.com, jgross@...e.com,
        mlombard@...hat.com
Subject: [PATCH AUTOSEL 5.15 53/68] x86/boot: Mark prepare_command_line() __init

From: Borislav Petkov <bp@...e.de>

[ Upstream commit c0f2077baa4113f38f008b8e912b9fb3ff8d43df ]

Fix:

  WARNING: modpost: vmlinux.o(.text.unlikely+0x64d0): Section mismatch in reference \
   from the function prepare_command_line() to the variable .init.data:command_line
  The function prepare_command_line() references
  the variable __initdata command_line.
  This is often because prepare_command_line lacks a __initdata
  annotation or the annotation of command_line is wrong.

Apparently some toolchains do different inlining decisions.

Reported-by: Stephen Rothwell <sfr@...b.auug.org.au>
Signed-off-by: Borislav Petkov <bp@...e.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Link: https://lkml.kernel.org/r/YZySgpmBcNNM2qca@zn.tnic
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/x86/kernel/setup.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index d71267081153f..ee055430a89f4 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -742,7 +742,7 @@ dump_kernel_offset(struct notifier_block *self, unsigned long v, void *p)
 	return 0;
 }
 
-static char *prepare_command_line(void)
+static char * __init prepare_command_line(void)
 {
 #ifdef CONFIG_CMDLINE_BOOL
 #ifdef CONFIG_CMDLINE_OVERRIDE
-- 
2.33.0