Commit-ID: 0cebbb60f759a709dabb3c87b9704f9844878850 Gitweb: https://git.kernel.org/tip/0cebbb60f759a709dabb3c87b9704f9844878850 Author: Dan Williams <dan.j.willi...@intel.com> AuthorDate: Tue, 4 Dec 2018 13:37:11 -0800 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Wed, 5 Dec 2018 09:03:06 +0100
generic/pgtable: Introduce {p4d,pgd}_same() In preparation for introducing '_safe' versions of page table entry 'set' helpers, introduce generic versions of p4d_same() and pgd_same(). Signed-off-by: Dan Williams <dan.j.willi...@intel.com> Acked-by: Kirill A. Shutemov <kirill.shute...@linux.intel.com> Cc: Andy Lutomirski <l...@kernel.org> Cc: Borislav Petkov <b...@alien8.de> Cc: Dave Hansen <dave.han...@linux.intel.com> Cc: H. Peter Anvin <h...@zytor.com> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Rik van Riel <r...@surriel.com> Cc: Sebastian Andrzej Siewior <bige...@linutronix.de> Cc: Thomas Gleixner <t...@linutronix.de> Link: http://lkml.kernel.org/r/154395943153.32119.1733586547359626311.st...@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Ingo Molnar <mi...@kernel.org> --- 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