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 <bige...@linutronix.de>
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Borislav Petkov <b...@alien8.de>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: Dave Hansen <dave.han...@intel.com>
Acked-by: Kirill A. Shutemov <kirill.shute...@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.willi...@intel.com>
---
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
