diff options
Diffstat (limited to 'arch/um/kernel/mem.c')
| -rw-r--r-- | arch/um/kernel/mem.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c index 379f33a1babf..76bec7de81b5 100644 --- a/arch/um/kernel/mem.c +++ b/arch/um/kernel/mem.c @@ -9,6 +9,8 @@ #include <linux/mm.h> #include <linux/swap.h> #include <linux/slab.h> +#include <linux/init.h> +#include <asm/sections.h> #include <asm/page.h> #include <asm/pgalloc.h> #include <as-layout.h> @@ -66,6 +68,7 @@ void __init arch_mm_preinit(void) map_memory(brk_end, __pa(brk_end), uml_reserved - brk_end, 1, 1, 0); memblock_free((void *)brk_end, uml_reserved - brk_end); uml_reserved = brk_end; + min_low_pfn = PFN_UP(__pa(uml_reserved)); max_pfn = max_low_pfn; } @@ -242,3 +245,11 @@ static const pgprot_t protection_map[16] = { [VM_SHARED | VM_EXEC | VM_WRITE | VM_READ] = PAGE_SHARED }; DECLARE_VM_GET_PAGE_PROT + +void mark_rodata_ro(void) +{ + unsigned long rodata_start = PFN_ALIGN(__start_rodata); + unsigned long rodata_end = PFN_ALIGN(__end_rodata); + + os_protect_memory((void *)rodata_start, rodata_end - rodata_start, 1, 0, 0); +} |