linux-kernel - [PATCH 4/4] kdump, oldmem: compare with saved_max

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Message-ID: <20130204062507.13161.37270.stgit@localhost6.localdomain6>
Date:	Mon, 04 Feb 2013 15:25:07 +0900
From:	HATAYAMA Daisuke <d.hatayama@...fujitsu.com>
To:	ralf@...ux-mips.org, michael@...erman.id.au,
	benh@...nel.crashing.org, paulus@...ba.org,
	holzheu@...ux.vnet.ibm.com, schwidefsky@...ibm.com,
	heiko.carstens@...ibm.com, vgoyal@...ibm.com
Cc:	kexec@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 4/4] kdump, oldmem: compare with saved_max_pfn exclusively

Signed-off-by: HATAYAMA Daisuke <d.hatayama@...fujitsu.com>
---

 drivers/char/mem.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index c6fa3bc..5da737c 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -369,7 +369,7 @@ static ssize_t read_oldmem(struct file *file, char __user *buf,
 
 	while (count) {
 		pfn = *ppos / PAGE_SIZE;
-		if (pfn > saved_max_pfn)
+		if (!(pfn < saved_max_pfn))
 			return read;
 
 		offset = (unsigned long)(*ppos % PAGE_SIZE);

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