| Dave Hansen | 66d3757 | 2016-02-12 13:02:32 -0800 | [diff] [blame^] | 1 | #ifndef _LINUX_PKEYS_H |
| 2 | #define _LINUX_PKEYS_H |
| 3 | |
| 4 | #include <linux/mm_types.h> |
| 5 | #include <asm/mmu_context.h> |
| 6 | |
| 7 | #ifdef CONFIG_ARCH_HAS_PKEYS |
| 8 | #include <asm/pkeys.h> |
| 9 | #else /* ! CONFIG_ARCH_HAS_PKEYS */ |
| 10 | #define arch_max_pkey() (1) |
| 11 | #endif /* ! CONFIG_ARCH_HAS_PKEYS */ |
| 12 | |
| 13 | /* |
| 14 | * This is called from mprotect_pkey(). |
| 15 | * |
| 16 | * Returns true if the protection keys is valid. |
| 17 | */ |
| 18 | static inline bool validate_pkey(int pkey) |
| 19 | { |
| 20 | if (pkey < 0) |
| 21 | return false; |
| 22 | return (pkey < arch_max_pkey()); |
| 23 | } |
| 24 | |
| 25 | #endif /* _LINUX_PKEYS_H */ |