Peter Zijlstra wrote:
> On Fri, Sep 13, 2013 at 04:06:10PM +0300, Kirill A. Shutemov wrote:
> > Basic api, backed by mm->page_table_lock for now. Actual implementation
> > will be added later.
> >
> > Signed-off-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
> > Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
> > ---
> > include/linux/mm.h | 13 +++++++++++++
> > 1 file changed, 13 insertions(+)
> >
> > diff --git a/include/linux/mm.h b/include/linux/mm.h
> > index 6cf8ddb..d4361e7 100644
> > --- a/include/linux/mm.h
> > +++ b/include/linux/mm.h
> > @@ -1294,6 +1294,19 @@ static inline void pgtable_page_dtor(struct page *page)
> > ((unlikely(pmd_none(*(pmd))) && __pte_alloc_kernel(pmd, address))? \
> > NULL: pte_offset_kernel(pmd, address))
> >
> > +static inline spinlock_t *huge_pmd_lockptr(struct mm_struct *mm, pmd_t *pmd)
> > +{
> > + return &mm->page_table_lock;
> > +}
> > +
> > +
> > +static inline spinlock_t *huge_pmd_lock(struct mm_struct *mm, pmd_t *pmd)
> > +{
> > + spinlock_t *ptl = huge_pmd_lockptr(mm, pmd);
> > + spin_lock(ptl);
> > + return ptl;
> > +}
>
> Why not call the thing pmd_lock()? The pmd bit differentiates it from
> pte_lock() enough IMIO.
Okay, will rename it.
--
Kirill A. Shutemov
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