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-rw-r--r--arch/powerpc/include/asm/mmu.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h
index 6364f5c2cc3e..bb38312cff28 100644
--- a/arch/powerpc/include/asm/mmu.h
+++ b/arch/powerpc/include/asm/mmu.h
@@ -260,6 +260,15 @@ static inline bool early_radix_enabled(void)
}
#endif
+#ifdef CONFIG_PPC_MEM_KEYS
+extern u16 get_mm_addr_key(struct mm_struct *mm, unsigned long address);
+#else
+static inline u16 get_mm_addr_key(struct mm_struct *mm, unsigned long address)
+{
+ return 0;
+}
+#endif /* CONFIG_PPC_MEM_KEYS */
+
#endif /* !__ASSEMBLY__ */
/* The kernel use the constants below to index in the page sizes array.