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-rw-r--r--arch/parisc/mm/init.c16
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