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

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Date:	Sat,  6 Jun 2015 14:14:12 +0800
From:	Minfei Huang <mhuang@...hat.com>
To:	ebiederm@...ssion.com, vgoyal@...hat.com
Cc:	kexec@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Minfei Huang <mnfhuang@...il.com>
Subject: [PATCH] kexec: Remove the unnecessary conditional judgement to simplify the code logic

From: Minfei Huang <mnfhuang@...il.com>

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>
---
 kernel/kexec.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/kernel/kexec.c b/kernel/kexec.c
index 7a36fdc..4589899 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -796,11 +796,10 @@ 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;
 }
-- 
2.2.2

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