diff options
Diffstat (limited to 'include/asm-generic/io.h')
| -rw-r--r-- | include/asm-generic/io.h | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h index 7ce93aaf69f8..72974cb81343 100644 --- a/include/asm-generic/io.h +++ b/include/asm-generic/io.h @@ -964,7 +964,34 @@ static inline void iounmap(volatile void __iomem *addr) #elif defined(CONFIG_GENERIC_IOREMAP) #include <linux/pgtable.h> -void __iomem *ioremap_prot(phys_addr_t addr, size_t size, unsigned long prot); +/* + * Arch code can implement the following two hooks when using GENERIC_IOREMAP + * ioremap_allowed() return a bool, + * - true means continue to remap + * - false means skip remap and return directly + * iounmap_allowed() return a bool, + * - true means continue to vunmap + * - false means skip vunmap and return directly + */ +#ifndef ioremap_allowed +#define ioremap_allowed ioremap_allowed +static inline bool ioremap_allowed(phys_addr_t phys_addr, size_t size, + unsigned long prot) +{ + return true; +} +#endif + +#ifndef iounmap_allowed +#define iounmap_allowed iounmap_allowed +static inline bool iounmap_allowed(void *addr) +{ + return true; +} +#endif + +void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size, + unsigned long prot); void iounmap(volatile void __iomem *addr); static inline void __iomem *ioremap(phys_addr_t addr, size_t size) @@ -1125,9 +1152,7 @@ static inline void memcpy_toio(volatile void __iomem *addr, const void *buffer, } #endif -#ifndef CONFIG_GENERIC_DEVMEM_IS_ALLOWED extern int devmem_is_allowed(unsigned long pfn); -#endif #endif /* __KERNEL__ */ |