diff options
Diffstat (limited to 'arch/arm64/mm/ioremap.c')
| -rw-r--r-- | arch/arm64/mm/ioremap.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/arch/arm64/mm/ioremap.c b/arch/arm64/mm/ioremap.c index 1725cd6db37a..2bb1d586664c 100644 --- a/arch/arm64/mm/ioremap.c +++ b/arch/arm64/mm/ioremap.c @@ -77,8 +77,24 @@ EXPORT_SYMBOL(__ioremap); void __iounmap(volatile void __iomem *io_addr) { - void *addr = (void *)(PAGE_MASK & (unsigned long)io_addr); + unsigned long addr = (unsigned long)io_addr & PAGE_MASK; - vunmap(addr); + /* + * We could get an address outside vmalloc range in case + * of ioremap_cache() reusing a RAM mapping. + */ + if (VMALLOC_START <= addr && addr < VMALLOC_END) + vunmap((void *)addr); } EXPORT_SYMBOL(__iounmap); + +void __iomem *ioremap_cache(phys_addr_t phys_addr, size_t size) +{ + /* For normal memory we already have a cacheable mapping. */ + if (pfn_valid(__phys_to_pfn(phys_addr))) + return (void __iomem *)__phys_to_virt(phys_addr); + + return __ioremap_caller(phys_addr, size, __pgprot(PROT_NORMAL), + __builtin_return_address(0)); +} +EXPORT_SYMBOL(ioremap_cache); |