From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Wang Dongsheng-B40534 <B40534@freescale.com>
Cc: Wood Scott-B07421 <B07421@freescale.com>,
"johannes@sipsolutions.net" <johannes@sipsolutions.net>,
"anton@enomsg.org" <anton@enomsg.org>,
"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>
Subject: Re: [PATCH v2 2/2] powerpc/hibernate: PPC64 fix user threads access to kernel space
Date: Sun, 09 Jun 2013 17:45:46 +1000 [thread overview]
Message-ID: <1370763946.14883.24.camel@pasglop> (raw)
In-Reply-To: <ABB05CD9C9F68C46A5CEDC7F15439259F6D57B@039-SN2MPN1-021.039d.mgd.msft.net>
On Sun, 2013-06-09 at 07:44 +0000, Wang Dongsheng-B40534 wrote:
> So we just need set set_context() in restore_mmu_context().
>
> void restore_mmu_context(struct mm_struct *next) {
> set_context(next->context.id, next->pgd);
> }
We probably also want to flush the TLB, just in case the boot kernel has
left "something" there (though I wouldn't expect it to have run
userspace it's not completely impossible).
Cheers,
Ben.
next prev parent reply other threads:[~2013-06-09 7:46 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-09 5:22 [PATCH v2 2/2] powerpc/hibernate: PPC64 fix user threads access to kernel space Wang Dongsheng
2013-06-09 6:43 ` Benjamin Herrenschmidt
2013-06-09 7:44 ` Wang Dongsheng-B40534
2013-06-09 7:45 ` Benjamin Herrenschmidt [this message]
2013-06-09 7:57 ` Wang Dongsheng-B40534
2013-06-09 11:31 ` Wang Dongsheng-B40534
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