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authorDan Williams <dan.j.williams@intel.com>2018-12-04 13:37:11 -0800
committerIngo Molnar <mingo@kernel.org>2018-12-05 09:03:06 +0100
commit0cebbb60f759a709dabb3c87b9704f9844878850 (patch)
tree593a2f8c46aaa3cd9f65163b787bee5943e0a5b6 /include/asm-generic/pgtable.h
parentc683c37cd13246941924c48f6c6a9863425e0cec (diff)
downloadlinux-0cebbb60f759a709dabb3c87b9704f9844878850.tar.bz2
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.williams@intel.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@surriel.com> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/154395943153.32119.1733586547359626311.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/asm-generic/pgtable.h')
-rw-r--r--include/asm-generic/pgtable.h14
1 files changed, 14 insertions, 0 deletions
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