linux-kernel - [REPOST PATCH] kexec: Remove the unnecessary conditional judgement to simplify the code logic

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Message-Id: <1438058802-6462-1-git-send-email-mnfhuang@gmail.com>
Date:	Tue, 28 Jul 2015 12:46:42 +0800
From:	Minfei Huang <mnfhuang@...il.com>
To:	akpm@...ux-foundation.org, vgoyal@...hat.com, ebiederm@...ssion.com
Cc:	kexec@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Minfei Huang <mnfhuang@...il.com>
Subject: [REPOST PATCH] kexec: Remove the unnecessary conditional judgement to simplify the code logic

Transforming PFN(Page Frame Number) to struct page is never failure, so
we can simplify the code logic to do the image->control_page assignment
directly in the loop, and remove the unnecessary conditional judgement.

Signed-off-by: Minfei Huang <mnfhuang@...il.com>
Acked-by: Dave Young <dyoung@...hat.com>
Acked-by: Vivek Goyal <vgoyal@...hat.com>
---
 kernel/kexec.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/kernel/kexec.c b/kernel/kexec.c
index 6f1ed75..cf82474 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -807,11 +807,10 @@ static struct page *kimage_alloc_crash_control_pages(struct kimage *image,
 		/* If I don't overlap any segments I have found my hole! */
 		if (i == image->nr_segments) {
 			pages = pfn_to_page(hole_start >> PAGE_SHIFT);
+			image->control_page = hole_end;
 			break;
 		}
 	}
-	if (pages)
-		image->control_page = hole_end;
 
 	return pages;
 }
-- 
2.4.0

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