diff options
| author | Anton Altaparmakov <aia21@cantab.net> | 2006-01-19 16:39:33 +0000 |
|---|---|---|
| committer | Anton Altaparmakov <aia21@cantab.net> | 2006-01-19 16:39:33 +0000 |
| commit | 944d79559d154c12becde0dab327016cf438f46c (patch) | |
| tree | 50c101806f4d3b6585222dda060559eb4f3e005a /arch/i386/mm/init.c | |
| parent | d087e4bdd24ebe3ae3d0b265b6573ec901af4b4b (diff) | |
| parent | 0f36b018b2e314d45af86449f1a97facb1fbe300 (diff) | |
Merge branch 'master' of /usr/src/ntfs-2.6/
Diffstat (limited to 'arch/i386/mm/init.c')
| -rw-r--r-- | arch/i386/mm/init.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/arch/i386/mm/init.c b/arch/i386/mm/init.c index 06e26f0062382..2700f01994ba1 100644 --- a/arch/i386/mm/init.c +++ b/arch/i386/mm/init.c @@ -268,7 +268,7 @@ static void __init permanent_kmaps_init(pgd_t *pgd_base) pkmap_page_table = pte; } -static void __devinit free_new_highpage(struct page *page) +static void __meminit free_new_highpage(struct page *page) { set_page_count(page, 1); __free_page(page); @@ -735,6 +735,30 @@ void free_initmem(void) printk (KERN_INFO "Freeing unused kernel memory: %dk freed\n", (__init_end - __init_begin) >> 10); } +#ifdef CONFIG_DEBUG_RODATA + +extern char __start_rodata, __end_rodata; +void mark_rodata_ro(void) +{ + unsigned long addr = (unsigned long)&__start_rodata; + + for (; addr < (unsigned long)&__end_rodata; addr += PAGE_SIZE) + change_page_attr(virt_to_page(addr), 1, PAGE_KERNEL_RO); + + printk ("Write protecting the kernel read-only data: %luk\n", + (unsigned long)(&__end_rodata - &__start_rodata) >> 10); + + /* + * change_page_attr() requires a global_flush_tlb() call after it. + * We do this after the printk so that if something went wrong in the + * change, the printk gets out at least to give a better debug hint + * of who is the culprit. + */ + global_flush_tlb(); +} +#endif + + #ifdef CONFIG_BLK_DEV_INITRD void free_initrd_mem(unsigned long start, unsigned long end) { |