diff options
Diffstat (limited to 'arch/arm64/mm/init.c')
| -rw-r--r-- | arch/arm64/mm/init.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c index f001d40eaaa7..4a49093dddd7 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -425,6 +425,11 @@ void __init mem_init(void) } } +static inline void poison_init_mem(void *s, size_t count) +{ + memset(s, 0, count); +} + void free_initmem(void) { free_initmem_default(0); @@ -450,6 +455,18 @@ static int __init keepinitrd_setup(char *__unused) __setup("keepinitrd", keepinitrd_setup); #endif +#ifdef CONFIG_KERNEL_TEXT_RDONLY +void set_kernel_text_ro(void) +{ + unsigned long start = PFN_ALIGN(_stext); + unsigned long end = PFN_ALIGN(_etext); + + /* + * Set the kernel identity mapping for text RO. + */ + set_memory_ro(start, (end - start) >> PAGE_SHIFT); +} +#endif /* * Dump out memory limit information on panic. */ |