From 087003e9ef7c1c5bec932387e47511429eff2a54 Mon Sep 17 00:00:00 2001 From: Ram Pai Date: Thu, 18 Jan 2018 17:50:41 -0800 Subject: powerpc: introduce get_mm_addr_key() helper get_mm_addr_key() helper returns the pkey associated with an address corresponding to a given mm_struct. Signed-off-by: Ram Pai Signed-off-by: Michael Ellerman --- arch/powerpc/include/asm/mmu.h | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'arch/powerpc/include/asm/mmu.h') 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. -- cgit v1.2.3