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SubjectRe: [PATCH] arm64: fix /proc/cpuinfo for elf32
Date
On 2016-04-25 09:12, Catalin Marinas wrote:
> On Mon, Apr 25, 2016 at 11:37:33AM +0800, Zeng Tao wrote:
> > For elf32 thread, personality is used for arm32,
> > and thread_flag for arm64.
> >
> > Here personality is used for arm64, so fix it.
> >
> > Signed-off-by: Zeng Tao <prime.zeng@huawei.com>
> > ---
> > arch/arm64/kernel/cpuinfo.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
>
> We discussed this some time ago and we decided against it. One reason
> was scripts where you may or may not end up with the desired cpuinfo
> (e.g. grep being 64-bit invoked by a 32-bit bash). The personality at
> least is inherited by child processes.
>
So you mean the 64-bit grep should see the same cpuinfo as 32-bit bash as
It is the child process?
But currently we have same 32-bit application which don't have their
personality set, so they get the wrong cpuinfo.
How to fix, call the personality syscall?

> --
> Catalin
>
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> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>
>
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