linux-kernel - [PATCH v4.4-rc8 1/4] x86/microcode/intel: save_mc_for

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Date:	Thu,  7 Jan 2016 07:59:56 -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 1/4] x86/microcode/intel: save_mc_for_early: Squelch frame size warning

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

arch/x86/kernel/cpu/microcode/intel.c: In function 'save_mc_for_early':
arch/x86/kernel/cpu/microcode/intel.c:516:1: 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 | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kernel/cpu/microcode/intel.c b/arch/x86/kernel/cpu/microcode/intel.c
index ce47402..bee5e84 100644
--- a/arch/x86/kernel/cpu/microcode/intel.c
+++ b/arch/x86/kernel/cpu/microcode/intel.c
@@ -463,13 +463,18 @@ static DEFINE_MUTEX(x86_cpu_microcode_mutex);
  */
 int save_mc_for_early(u8 *mc)
 {
-	struct microcode_intel *mc_saved_tmp[MAX_UCODE_COUNT];
+	struct microcode_intel **mc_saved_tmp;
 	unsigned int mc_saved_count_init;
 	unsigned int mc_saved_count;
 	struct microcode_intel **mc_saved;
 	int ret = 0;
 	int i;
 
+	mc_saved_tmp = kcalloc(MAX_UCODE_COUNT, sizeof(*mc_saved_tmp),
+		GFP_KERNEL);
+	if (!mc_saved_tmp)
+		return -ENOMEM;
+
 	/*
 	 * Hold hotplug lock so mc_saved_data is not accessed by a CPU in
 	 * hotplug.
@@ -512,6 +517,7 @@ int save_mc_for_early(u8 *mc)
 out:
 	mutex_unlock(&x86_cpu_microcode_mutex);
 
+	kfree(mc_saved_tmp);
 	return ret;
 }
 EXPORT_SYMBOL_GPL(save_mc_for_early);
-- 
1.9.1

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