On Fri, Jul 18, 2014 at 07:53:04AM +0100, Minchan Kim wrote: > MADV_FREE needs pmd_dirty and pmd_mkclean for detecting recent > overwrite of the contents since MADV_FREE syscall is called for > THP page. > > This patch adds pmd_dirty and pmd_mkclean for THP page MADV_FREE > support. > > Cc: Catalin Marinas <[email protected]> > Cc: Will Deacon <[email protected]> > Cc: Steve Capper <[email protected]> > Cc: Russell King <[email protected]> > Cc: [email protected] > Signed-off-by: Minchan Kim <[email protected]> > --- > arch/arm/include/asm/pgtable-3level.h | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/arch/arm/include/asm/pgtable-3level.h > b/arch/arm/include/asm/pgtable-3level.h > index 85c60adc8b60..830f84f2d277 100644 > --- a/arch/arm/include/asm/pgtable-3level.h > +++ b/arch/arm/include/asm/pgtable-3level.h > @@ -220,6 +220,8 @@ static inline pmd_t *pmd_offset(pud_t *pud, unsigned long > addr) > #define pmd_trans_splitting(pmd) (pmd_val(pmd) & PMD_SECT_SPLITTING) > #endif > > +#define pmd_dirty(pmd) (pmd_val(pmd) & PMD_SECT_DIRTY) > + > #define PMD_BIT_FUNC(fn,op) \ > static inline pmd_t pmd_##fn(pmd_t pmd) { pmd_val(pmd) op; return pmd; } > > @@ -228,6 +230,7 @@ PMD_BIT_FUNC(mkold, &= ~PMD_SECT_AF); > PMD_BIT_FUNC(mksplitting, |= PMD_SECT_SPLITTING); > PMD_BIT_FUNC(mkwrite, &= ~PMD_SECT_RDONLY); > PMD_BIT_FUNC(mkdirty, |= PMD_SECT_DIRTY); > +PMD_BIT_FUNC(mkclean, &= ~PMD_SECT_DIRTY); > PMD_BIT_FUNC(mkyoung, |= PMD_SECT_AF); > > #define pmd_mkhuge(pmd) (__pmd(pmd_val(pmd) & ~PMD_TABLE_BIT))
Looks fine to me, but again, it would be great if Steve can take a look too. Will -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
