On Wed, 2011-11-23 at 07:07 +0800, Andrew Morton wrote:
> On Tue, 15 Nov 2011 15:04:18 +0800
> Shaohua Li <shaohua.li@xxxxxxxxx> wrote:
>
> > --- linux.orig/include/asm-generic/tlb.h 2011-11-15 09:39:11.000000000 +0800
> > +++ linux/include/asm-generic/tlb.h 2011-11-15 09:39:23.000000000 +0800
> > @@ -139,6 +139,20 @@ static inline void tlb_remove_page(struc
> > __tlb_remove_tlb_entry(tlb, ptep, address); \
> > } while (0)
> >
> > +/**
> > + * tlb_remove_pmd_tlb_entry - remember a pmd mapping for later tlb invalidation
> > + * This is a nop so far, because only x86 needs it.
> > + */
> > +#ifndef __tlb_remove_pmd_tlb_entry
> > +#define __tlb_remove_pmd_tlb_entry(tlb, pmdp, address) do {} while (0)
> > +#endif
> > +
> > +#define tlb_remove_pmd_tlb_entry(tlb, pmdp, address) \
> > + do { \
> > + tlb->need_flush = 1; \
> > + __tlb_remove_pmd_tlb_entry(tlb, pmdp, address); \
> > + } while (0)
> > +
>
> Is there any reason why we cannot implement tlb_remove_pmd_tlb_entry()
> as a nice, typesafe C function?
no particular reason. I just followed tlb_remove_tlb_entry. all existing
codes in the file are not c function.
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