linux-kernel - [PATCH v2] kexec: Set KEXEC_TYPE_CRASH before sanity_check_segment

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Message-Id: <1449045576-18829-1-git-send-email-xlpang@redhat.com>
Date:	Wed,  2 Dec 2015 16:39:36 +0800
From:	Xunlei Pang <xlpang@...hat.com>
To:	linux-kernel@...r.kernel.org, kexec@...ts.infradead.org
Cc:	akpm@...ux-foundation.org, Eric Biederman <ebiederm@...ssion.com>,
	Dave Young <dyoung@...hat.com>, Xunlei Pang <xlpang@...hat.com>
Subject: [PATCH v2] kexec: Set KEXEC_TYPE_CRASH before sanity_check_segment_list()

sanity_check_segment_list() checks KEXEC_TYPE_CRASH flag to ensure
all the segments of the loaded crash kernel are winthin the kernel
crash resource limits, so set the flag beforehand.

Signed-off-by: Xunlei Pang <xlpang@...hat.com>
Acked-by: Dave Young <dyoung@...hat.com>
---
v1 -> v2:
Improved some comments.

 kernel/kexec.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/kernel/kexec.c b/kernel/kexec.c
index d873b64..ee70aef 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -63,16 +63,16 @@ static int kimage_alloc_init(struct kimage **rimage, unsigned long entry,
 	if (ret)
 		goto out_free_image;
 
-	ret = sanity_check_segment_list(image);
-	if (ret)
-		goto out_free_image;
-
-	 /* Enable the special crash kernel control page allocation policy. */
 	if (kexec_on_panic) {
+		/* Enable special crash kernel control page alloc policy. */
 		image->control_page = crashk_res.start;
 		image->type = KEXEC_TYPE_CRASH;
 	}
 
+	ret = sanity_check_segment_list(image);
+	if (ret)
+		goto out_free_image;
+
 	/*
 	 * Find a location for the control code buffer, and add it
 	 * the vector of segments so that it's pages will also be
-- 
2.5.0

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