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

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

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

arch/x86/kernel/cpu/microcode/intel.c: In function 'get_matching_model_microcode.isra.3.constprop':
arch/x86/kernel/cpu/microcode/intel.c:348:1: warning: the frame size of 1080 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 | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/cpu/microcode/intel.c b/arch/x86/kernel/cpu/microcode/intel.c
index e019c11..03099ea 100644
--- a/arch/x86/kernel/cpu/microcode/intel.c
+++ b/arch/x86/kernel/cpu/microcode/intel.c
@@ -303,11 +303,16 @@ get_matching_model_microcode(int cpu, unsigned long start,
 	enum ucode_state state = UCODE_OK;
 	unsigned int mc_size;
 	struct microcode_header_intel *mc_header;
-	struct microcode_intel *mc_saved_tmp[MAX_UCODE_COUNT];
+	struct microcode_intel **mc_saved_tmp;
 	unsigned int mc_saved_count = mc_saved_data->mc_saved_count;
 	int i;
 
-	while (leftover && mc_saved_count < ARRAY_SIZE(mc_saved_tmp)) {
+	mc_saved_tmp = kcalloc(MAX_UCODE_COUNT, sizeof(*mc_saved_tmp),
+		GFP_KERNEL);
+	if (!mc_saved_tmp)
+		return UCODE_ERROR;
+
+	while (leftover && mc_saved_count < MAX_UCODE_COUNT) {
 
 		if (leftover < sizeof(mc_header))
 			break;
@@ -352,6 +357,7 @@ get_matching_model_microcode(int cpu, unsigned long start,
 
 	mc_saved_data->mc_saved_count = mc_saved_count;
 out:
+	kfree(mc_saved_tmp);
 	return state;
 }
 
-- 
1.9.1

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