linux-kernel - [PATCH 5.16 0644/1039] x86/mce: Mark mce_read

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Message-Id: <20220124184147.005035525@linuxfoundation.org>
Date:   Mon, 24 Jan 2022 19:40:33 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Borislav Petkov <bp@...e.de>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.16 0644/1039] x86/mce: Mark mce_read_aux() noinstr

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

[ Upstream commit db6c996d6ce45dfb44891f0824a65ecec216f47a ]

Fixes

  vmlinux.o: warning: objtool: do_machine_check()+0x681: call to mce_read_aux() leaves .noinstr.text section

Signed-off-by: Borislav Petkov <bp@...e.de>
Link: https://lore.kernel.org/r/20211208111343.8130-10-bp@alien8.de
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/x86/kernel/cpu/mce/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
index 75095986e5eff..69fd51a29278f 100644
--- a/arch/x86/kernel/cpu/mce/core.c
+++ b/arch/x86/kernel/cpu/mce/core.c
@@ -645,7 +645,7 @@ static struct notifier_block mce_default_nb = {
 /*
  * Read ADDR and MISC registers.
  */
-static void mce_read_aux(struct mce *m, int i)
+static noinstr void mce_read_aux(struct mce *m, int i)
 {
 	if (m->status & MCI_STATUS_MISCV)
 		m->misc = mce_rdmsrl(mca_msr_reg(i, MCA_MISC));
-- 
2.34.1