diff options
Diffstat (limited to 'arch/arc/mm/ioremap.c')
| -rw-r--r-- | arch/arc/mm/ioremap.c | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/arch/arc/mm/ioremap.c b/arch/arc/mm/ioremap.c index 739e65f355de..75b0ca6e387e 100644 --- a/arch/arc/mm/ioremap.c +++ b/arch/arc/mm/ioremap.c @@ -14,18 +14,21 @@ #include <linux/slab.h> #include <linux/cache.h> -void __iomem *ioremap(unsigned long paddr, unsigned long size) +void __iomem *ioremap(phys_addr_t paddr, unsigned long size) { - unsigned long end; + phys_addr_t end; /* Don't allow wraparound or zero size */ end = paddr + size - 1; if (!size || (end < paddr)) return NULL; - /* If the region is h/w uncached, avoid MMU mappings */ + /* + * If the region is h/w uncached, MMU mapping can be elided as optim + * The cast to u32 is fine as this region can only be inside 4GB + */ if (paddr >= ARC_UNCACHED_ADDR_SPACE) - return (void __iomem *)paddr; + return (void __iomem *)(u32)paddr; return ioremap_prot(paddr, size, PAGE_KERNEL_NO_CACHE); } @@ -41,9 +44,9 @@ EXPORT_SYMBOL(ioremap); void __iomem *ioremap_prot(phys_addr_t paddr, unsigned long size, unsigned long flags) { - void __iomem *vaddr; + unsigned long vaddr; struct vm_struct *area; - unsigned long off, end; + phys_addr_t off, end; pgprot_t prot = __pgprot(flags); /* Don't allow wraparound, zero size */ @@ -70,9 +73,8 @@ void __iomem *ioremap_prot(phys_addr_t paddr, unsigned long size, if (!area) return NULL; area->phys_addr = paddr; - vaddr = (void __iomem *)area->addr; - if (ioremap_page_range((unsigned long)vaddr, - (unsigned long)vaddr + size, paddr, prot)) { + vaddr = (unsigned long)area->addr; + if (ioremap_page_range(vaddr, vaddr + size, paddr, prot)) { vunmap((void __force *)vaddr); return NULL; } |