From: Yong Zhang <yong.zhang@windriver.com>
To: <ralf@linux-mips.org>, <huawei.libin@huawei.com>
Cc: <linux-mips@linux-mips.org>, <linux-kernel@vger.kernel.org>
Subject: [PATCH V2] MIPS: change type of asid_cache to unsigned long
Date: Wed, 21 May 2014 13:36:03 +0800 [thread overview]
Message-ID: <1400650563-1033-1-git-send-email-yong.zhang@windriver.com> (raw)
asid_cache must be unsigned long otherwise on 64bit system
it will become 0 if the value in get_new_mmu_context()
reaches 0xffffffff and in the end the assumption of
ASID_FIRST_VERSION is not true anymore thus leads to
more dangerous things.
Reported-by: libin <huawei.libin@huawei.com>
Signed-off-by: Yong Zhang <yong.zhang@windriver.com>
---
V2<-V1: Add the reporter.
arch/mips/include/asm/cpu-info.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/mips/include/asm/cpu-info.h b/arch/mips/include/asm/cpu-info.h
index f6299be..ebcc2ed 100644
--- a/arch/mips/include/asm/cpu-info.h
+++ b/arch/mips/include/asm/cpu-info.h
@@ -40,7 +40,7 @@ struct cache_desc {
struct cpuinfo_mips {
unsigned int udelay_val;
- unsigned int asid_cache;
+ unsigned long asid_cache;
/*
* Capability and feature descriptor structure for MIPS CPU
--
1.7.9.5
next reply other threads:[~2014-05-21 5:36 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-21 5:36 Yong Zhang [this message]
2014-05-27 4:16 ` Li Zefan
2014-05-27 4:34 ` Yong Zhang
2014-05-27 4:56 ` Li Zefan
2014-05-27 4:50 ` Yong Zhang
2014-05-27 5:07 ` Li Zefan
2014-05-27 5:23 ` Yong Zhang
2014-05-27 5:52 ` Li Zefan
2014-05-28 20:09 ` Aaro Koskinen
2014-05-29 8:57 ` Li Zefan
2014-05-29 10:20 ` Ralf Baechle
2014-05-30 7:08 ` Libin
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