diff options
| author | Ingo Molnar <mingo@elte.hu> | 2008-07-10 11:43:00 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-10 11:43:00 +0200 |
| commit | bac0c9103b31c3dd83ad9d731dd9834e2ba75e4f (patch) | |
| tree | 702dd6a7ce06d224d594c2293af546b11ac9f51b /arch/x86/mm/init_64.c | |
| parent | 6329d3021bcfa9038621e6e917d98929421d8ec8 (diff) | |
| parent | 98a05ed4bd7774f533ab185fe0bf2fdc58292d7c (diff) | |
Merge branch 'tracing/ftrace' into auto-ftrace-next
Diffstat (limited to 'arch/x86/mm/init_64.c')
| -rw-r--r-- | arch/x86/mm/init_64.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index 819dad973b1..17c0a6138a5 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -767,6 +767,13 @@ EXPORT_SYMBOL_GPL(rodata_test_data); void mark_rodata_ro(void) { unsigned long start = PFN_ALIGN(_stext), end = PFN_ALIGN(__end_rodata); + unsigned long rodata_start = + ((unsigned long)__start_rodata + PAGE_SIZE - 1) & PAGE_MASK; + +#ifdef CONFIG_DYNAMIC_FTRACE + /* Dynamic tracing modifies the kernel text section */ + start = rodata_start; +#endif printk(KERN_INFO "Write protecting the kernel read-only data: %luk\n", (end - start) >> 10); @@ -776,8 +783,7 @@ void mark_rodata_ro(void) * The rodata section (but not the kernel text!) should also be * not-executable. */ - start = ((unsigned long)__start_rodata + PAGE_SIZE - 1) & PAGE_MASK; - set_memory_nx(start, (end - start) >> PAGE_SHIFT); + set_memory_nx(rodata_start, (end - rodata_start) >> PAGE_SHIFT); rodata_test(); |