diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/parisc/mm/init.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c index 34d91cb8b259..96970fa75e4a 100644 --- a/arch/parisc/mm/init.c +++ b/arch/parisc/mm/init.c @@ -459,7 +459,6 @@ void free_initmem(void) unsigned long kernel_end = (unsigned long)&_end; /* Remap kernel text and data, but do not touch init section yet. */ - kernel_set_to_readonly = true; map_pages(init_end, __pa(init_end), kernel_end - init_end, PAGE_KERNEL, 0); @@ -493,11 +492,18 @@ void free_initmem(void) #ifdef CONFIG_STRICT_KERNEL_RWX void mark_rodata_ro(void) { - /* rodata memory was already mapped with KERNEL_RO access rights by - pagetable_init() and map_pages(). No need to do additional stuff here */ - unsigned long roai_size = __end_ro_after_init - __start_ro_after_init; + unsigned long start = (unsigned long) &__start_rodata; + unsigned long end = (unsigned long) &__end_rodata; + + pr_info("Write protecting the kernel read-only data: %luk\n", + (end - start) >> 10); + + kernel_set_to_readonly = true; + map_pages(start, __pa(start), end - start, PAGE_KERNEL, 0); - pr_info("Write protected read-only-after-init data: %luk\n", roai_size >> 10); + /* force the kernel to see the new page table entries */ + flush_cache_all(); + flush_tlb_all(); } #endif |