Messages in this thread Patch in this message | | | From | Yong Zhang <> | Subject | [PATCH V2] MIPS: change type of asid_cache to unsigned long | Date | Wed, 21 May 2014 13:36:03 +0800 |
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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
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