From: Catalin Marinas <catalin.marinas@arm.com>
To: Michal Hocko <mhocko@suse.cz>
Cc: Will Deacon <Will.Deacon@arm.com>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
Steve Capper <Steve.Capper@arm.com>
Subject: Re: [PATCH 2/3] mm: thp: Fix the update_mmu_cache() last argument passing in mm/huge_memory.c
Date: Wed, 12 Sep 2012 16:51:35 +0100 [thread overview]
Message-ID: <20120912155135.GD10698@arm.com> (raw)
In-Reply-To: <20120912154037.GU21579@dhcp22.suse.cz>
On Wed, Sep 12, 2012 at 04:40:37PM +0100, Michal Hocko wrote:
> On Tue 11-09-12 17:47:15, Will Deacon wrote:
> > From: Catalin Marinas <catalin.marinas@arm.com>
> >
> > The update_mmu_cache() takes a pointer (to pte_t by default) as the last
> > argument but the huge_memory.c passes a pmd_t value. The patch changes
> > the argument to the pmd_t * pointer.
> >
> > Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
> > Signed-off-by: Steve Capper <steve.capper@arm.com>
> > Signed-off-by: Will Deacon <will.deacon@arm.com>
> > ---
> > mm/huge_memory.c | 6 +++---
> > 1 files changed, 3 insertions(+), 3 deletions(-)
> >
> > diff --git a/mm/huge_memory.c b/mm/huge_memory.c
> > index 57c4b93..4aa6d02 100644
> > --- a/mm/huge_memory.c
> > +++ b/mm/huge_memory.c
> > @@ -934,7 +934,7 @@ int do_huge_pmd_wp_page(struct mm_struct *mm, struct vm_area_struct *vma,
> > entry = pmd_mkyoung(orig_pmd);
> > entry = maybe_pmd_mkwrite(pmd_mkdirty(entry), vma);
> > if (pmdp_set_access_flags(vma, haddr, pmd, entry, 1))
> > - update_mmu_cache(vma, address, entry);
> > + update_mmu_cache(vma, address, pmd);
>
> I am not sure but shouldn't we use the new entry rather than the given
> pmd?
The pmd pointer is the new pmd and 'entry' is the new value derived from
orig_pmd. update_mmu_cache() expects a pointer to pte_t or pmd_t rather
than it's value.
--
Catalin
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next prev parent reply other threads:[~2012-09-12 15:52 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-11 16:47 [PATCH 0/3] Minor changes to common hugetlb code for ARM Will Deacon
2012-09-11 16:47 ` [PATCH 1/3] mm: thp: Fix the pmd_clear() arguments in pmdp_get_and_clear() Will Deacon
2012-09-11 17:12 ` Kirill A. Shutemov
2012-09-12 15:30 ` Michal Hocko
2012-09-11 16:47 ` [PATCH 2/3] mm: thp: Fix the update_mmu_cache() last argument passing in mm/huge_memory.c Will Deacon
2012-09-11 17:38 ` Kirill A. Shutemov
2012-09-12 15:40 ` Michal Hocko
2012-09-12 15:51 ` Catalin Marinas [this message]
2012-09-15 13:38 ` Ralf Baechle
2012-09-18 19:33 ` Andrew Morton
2012-09-19 9:12 ` Catalin Marinas
2012-09-19 15:53 ` Ralf Baechle
2012-09-20 12:44 ` Will Deacon
2012-09-20 19:32 ` David Miller
2012-09-11 16:47 ` [PATCH 3/3] mm: Introduce HAVE_ARCH_TRANSPARENT_HUGEPAGE Will Deacon
2012-09-11 17:41 ` Kirill A. Shutemov
2012-09-12 15:32 ` Michal Hocko
2012-09-12 18:06 ` Chris Metcalf
2012-09-12 18:10 ` Will Deacon
2012-09-13 19:05 ` Andrew Morton
2012-09-13 21:26 ` Will Deacon
2012-09-13 21:27 ` Stephen Rothwell
2012-09-13 21:40 ` Andrew Morton
2012-09-12 15:27 ` [PATCH 0/3] Minor changes to common hugetlb code for ARM Michal Hocko
2012-09-12 15:55 ` Will Deacon
2012-09-13 12:22 ` Michal Hocko
2012-09-13 0:12 ` Andrea Arcangeli
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