linux-kernel - [PATCH v4.4-rc8 2/4] x86/microcode/intel: save_microcode_in_initrd

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Date:	Thu,  7 Jan 2016 07:59:57 -0700
From:	tim.gardner@...onical.com
To:	x86@...nel.org, linux-kernel@...r.kernel.org
Cc:	Tim Gardner <tim.gardner@...onical.com>,
	Borislav Petkov <bp@...en8.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: [PATCH v4.4-rc8 2/4] x86/microcode/intel: save_microcode_in_initrd_intel: Squelch frame size warning

From: Tim Gardner <tim.gardner@...onical.com>

arch/x86/kernel/cpu/microcode/intel.c: In function 'save_microcode_in_initrd_intel':
arch/x86/kernel/cpu/microcode/intel.c:705:1: warning: the frame size of 1032 bytes is larger than 1024 bytes [-Wframe-larger-than=]

gcc version 5.3.1 20160101 (Ubuntu 5.3.1-5ubuntu1)

Cc: Borislav Petkov <bp@...en8.de>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: "H. Peter Anvin" <hpa@...or.com>
Signed-off-by: Tim Gardner <tim.gardner@...onical.com>
---
 arch/x86/kernel/cpu/microcode/intel.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kernel/cpu/microcode/intel.c b/arch/x86/kernel/cpu/microcode/intel.c
index bee5e84..ebf5e66 100644
--- a/arch/x86/kernel/cpu/microcode/intel.c
+++ b/arch/x86/kernel/cpu/microcode/intel.c
@@ -694,12 +694,16 @@ static int apply_microcode_early(struct ucode_cpu_info *uci, bool early)
 int __init save_microcode_in_initrd_intel(void)
 {
 	unsigned int count = mc_saved_data.mc_saved_count;
-	struct microcode_intel *mc_saved[MAX_UCODE_COUNT];
+	struct microcode_intel **mc_saved;
 	int ret = 0;
 
 	if (count == 0)
 		return ret;
 
+	mc_saved = kcalloc(MAX_UCODE_COUNT, sizeof(*mc_saved), GFP_KERNEL);
+	if (!mc_saved)
+		return -ENOMEM;
+
 	copy_initrd_ptrs(mc_saved, mc_saved_in_initrd, initrd_start, count);
 	ret = save_microcode(&mc_saved_data, mc_saved, count);
 	if (ret)
@@ -707,6 +711,7 @@ int __init save_microcode_in_initrd_intel(void)
 
 	show_saved_mc();
 
+	kfree(mc_saved);
 	return ret;
 }
 
-- 
1.9.1

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