From 914ee96654d87abc548bdd44ad9e4b3a14173cac Mon Sep 17 00:00:00 2001 From: Palmer Dabbelt Date: Thu, 9 Jul 2020 12:00:10 -0700 Subject: arm: Use the generic devmem_is_allowed() This is exactly the same as the arm64 version, which I recently copied into lib/ for use by the RISC-V port. Reviewed-by: Luis Chamberlain Signed-off-by: Palmer Dabbelt --- arch/arm/mm/mmap.c | 22 ---------------------- 1 file changed, 22 deletions(-) (limited to 'arch/arm/mm/mmap.c') diff --git a/arch/arm/mm/mmap.c b/arch/arm/mm/mmap.c index b8d912ac9e61..a0f8a0ca0788 100644 --- a/arch/arm/mm/mmap.c +++ b/arch/arm/mm/mmap.c @@ -165,25 +165,3 @@ int valid_mmap_phys_addr_range(unsigned long pfn, size_t size) { return (pfn + (size >> PAGE_SHIFT)) <= (1 + (PHYS_MASK >> PAGE_SHIFT)); } - -#ifdef CONFIG_STRICT_DEVMEM - -#include - -/* - * devmem_is_allowed() checks to see if /dev/mem access to a certain - * address is valid. The argument is a physical page number. - * We mimic x86 here by disallowing access to system RAM as well as - * device-exclusive MMIO regions. This effectively disable read()/write() - * on /dev/mem. - */ -int devmem_is_allowed(unsigned long pfn) -{ - if (iomem_is_exclusive(pfn << PAGE_SHIFT)) - return 0; - if (!page_is_ram(pfn)) - return 1; - return 0; -} - -#endif -- cgit v1.2.3