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| author | Ram Pai <linuxram@us.ibm.com> | 2018-01-18 17:50:41 -0800 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-01-20 22:59:05 +1100 |
| commit | 087003e9ef7c1c5bec932387e47511429eff2a54 (patch) | |
| tree | fcd8cdc6a20be99816dcf9741b26215c1a69f27d /arch/powerpc/include/asm/mmu.h | |
| parent | e6c2a4797e101a25eced94aa9e1fc42c30247aec (diff) | |
| download | lwn-087003e9ef7c1c5bec932387e47511429eff2a54.tar.gz lwn-087003e9ef7c1c5bec932387e47511429eff2a54.zip | |
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 <linuxram@us.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/mmu.h')
| -rw-r--r-- | arch/powerpc/include/asm/mmu.h | 9 |
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. |