linux-kernel - [PATCH] x86, setup: code clean of e820_reserve_setup

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Message-Id: <1433384326-16863-1-git-send-email-weiyang@linux.vnet.ibm.com>
Date:	Thu,  4 Jun 2015 10:18:46 +0800
From:	Wei Yang <weiyang@...ux.vnet.ibm.com>
To:	yinghai@...nel.org
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org,
	Wei Yang <weiyang@...ux.vnet.ibm.com>
Subject: [PATCH] x86, setup: code clean of e820_reserve_setup_data()

pa_data and found are highly related, so there is no need to set a found
flag.

This patch removes the found and just return when pa_data is NULL.

Signed-off-by: Wei Yang <weiyang@...ux.vnet.ibm.com>
---
 arch/x86/kernel/setup.c |    7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 0a2421c..b95e653 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -461,19 +461,18 @@ static void __init e820_reserve_setup_data(void)
 {
 	struct setup_data *data;
 	u64 pa_data;
-	int found = 0;
 
 	pa_data = boot_params.hdr.setup_data;
+	if (!pa_data)
+		return;
+
 	while (pa_data) {
 		data = early_memremap(pa_data, sizeof(*data));
 		e820_update_range(pa_data, sizeof(*data)+data->len,
 			 E820_RAM, E820_RESERVED_KERN);
-		found = 1;
 		pa_data = data->next;
 		early_iounmap(data, sizeof(*data));
 	}
-	if (!found)
-		return;
 
 	sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
 	memcpy(&e820_saved, &e820, sizeof(struct e820map));
-- 
1.7.9.5

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