diff options
| author | Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> | 2008-02-02 15:42:20 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-04-17 17:40:58 +0200 |
| commit | 4e4eee0e0139811b36a07854dcfa9746bc8b16d3 (patch) | |
| tree | a9386a0816fe40cec4fae524759dc7cb93f46725 /arch/x86/mm | |
| parent | e587cadd8f47e202a30712e2906a65a0606d5865 (diff) | |
x86: enhance DEBUG_RODATA support for hotplug and kprobes
Standardize DEBUG_RODATA, removing special cases for hotplug and kprobes.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: pageexec@freemail.hu
Cc: akpm@linux-foundation.org
CC: Andi Kleen <andi@firstfloor.org>
CC: pageexec@freemail.hu
CC: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/mm')
| -rw-r--r-- | arch/x86/mm/init_32.c | 24 | ||||
| -rw-r--r-- | arch/x86/mm/init_64.c | 20 |
2 files changed, 10 insertions, 34 deletions
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c index ee1091a4696..00168e65688 100644 --- a/arch/x86/mm/init_32.c +++ b/arch/x86/mm/init_32.c @@ -723,25 +723,17 @@ void mark_rodata_ro(void) unsigned long start = PFN_ALIGN(_text); unsigned long size = PFN_ALIGN(_etext) - start; -#ifndef CONFIG_KPROBES -#ifdef CONFIG_HOTPLUG_CPU - /* It must still be possible to apply SMP alternatives. */ - if (num_possible_cpus() <= 1) -#endif - { - set_pages_ro(virt_to_page(start), size >> PAGE_SHIFT); - printk(KERN_INFO "Write protecting the kernel text: %luk\n", - size >> 10); + set_pages_ro(virt_to_page(start), size >> PAGE_SHIFT); + printk(KERN_INFO "Write protecting the kernel text: %luk\n", + size >> 10); #ifdef CONFIG_CPA_DEBUG - printk(KERN_INFO "Testing CPA: Reverting %lx-%lx\n", - start, start+size); - set_pages_rw(virt_to_page(start), size>>PAGE_SHIFT); + printk(KERN_INFO "Testing CPA: Reverting %lx-%lx\n", + start, start+size); + set_pages_rw(virt_to_page(start), size>>PAGE_SHIFT); - printk(KERN_INFO "Testing CPA: write protecting again\n"); - set_pages_ro(virt_to_page(start), size>>PAGE_SHIFT); -#endif - } + printk(KERN_INFO "Testing CPA: write protecting again\n"); + set_pages_ro(virt_to_page(start), size>>PAGE_SHIFT); #endif start += size; size = (unsigned long)__end_rodata - start; diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index ae66d8d4c58..4cb6c7f80f0 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -635,24 +635,7 @@ EXPORT_SYMBOL_GPL(rodata_test_data); void mark_rodata_ro(void) { - unsigned long start = (unsigned long)_stext, end; - -#ifdef CONFIG_HOTPLUG_CPU - /* It must still be possible to apply SMP alternatives. */ - if (num_possible_cpus() > 1) - start = (unsigned long)_etext; -#endif - -#ifdef CONFIG_KPROBES - start = (unsigned long)__start_rodata; -#endif - - end = (unsigned long)__end_rodata; - start = (start + PAGE_SIZE - 1) & PAGE_MASK; - end &= PAGE_MASK; - if (end <= start) - return; - + unsigned long start = PFN_ALIGN(_stext), end = PFN_ALIGN(__end_rodata); printk(KERN_INFO "Write protecting the kernel read-only data: %luk\n", (end - start) >> 10); @@ -675,6 +658,7 @@ void mark_rodata_ro(void) set_memory_ro(start, (end-start) >> PAGE_SHIFT); #endif } + #endif #ifdef CONFIG_BLK_DEV_INITRD |