In preparation for introducing '_safe' versions of page table entry 'set' helpers, introduce generic versions of p4d_same() and pgd_same().
Cc: Sebastian Andrzej Siewior <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Dave Hansen <[email protected]> Acked-by: Kirill A. Shutemov <[email protected]> Signed-off-by: Dan Williams <[email protected]> --- include/asm-generic/pgtable.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h index eea50ef8b8cd..dae7f98babed 100644 --- a/include/asm-generic/pgtable.h +++ b/include/asm-generic/pgtable.h @@ -386,6 +386,20 @@ static inline int pud_same(pud_t pud_a, pud_t pud_b) } #endif +#ifndef __HAVE_ARCH_P4D_SAME +static inline int p4d_same(p4d_t p4d_a, p4d_t p4d_b) +{ + return p4d_val(p4d_a) == p4d_val(p4d_b); +} +#endif + +#ifndef __HAVE_ARCH_PGD_SAME +static inline int pgd_same(pgd_t pgd_a, pgd_t pgd_b) +{ + return pgd_val(pgd_a) == pgd_val(pgd_b); +} +#endif + #ifndef __HAVE_ARCH_DO_SWAP_PAGE /* * Some architectures support metadata associated with a page. When a
