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Subject[patch 10/24] Text Edit Lock - x86_32 standardize debug rodata
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: Thomas Gleixner <tglx@linutronix.de>
CC: Ingo Molnar <mingo@redhat.com>
CC: H. Peter Anvin <hpa@zytor.com>
---
arch/x86/mm/init_32.c | 20 +++++++-------------
1 file changed, 7 insertions(+), 13 deletions(-)
Index: linux-2.6-lttng/arch/x86/mm/init_32.c
===================================================================
--- linux-2.6-lttng.orig/arch/x86/mm/init_32.c 2007-11-13 09:25:29.000000000 -0500
+++ linux-2.6-lttng/arch/x86/mm/init_32.c 2007-11-13 09:45:48.000000000 -0500
@@ -784,28 +784,21 @@ static int noinline do_test_wp_bit(void)
}

#ifdef CONFIG_DEBUG_RODATA
-
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
- {
- change_page_attr(virt_to_page(start),
- size >> PAGE_SHIFT, PAGE_KERNEL_RX);
- printk("Write protecting the kernel text: %luk\n", size >> 10);
- }
-#endif
+ change_page_attr(virt_to_page(start),
+ size >> PAGE_SHIFT, PAGE_KERNEL_RX);
+ printk(KERN_INFO "Write protecting the kernel text: %luk\n",
+ size >> 10);
+
start += size;
size = (unsigned long)__end_rodata - start;
change_page_attr(virt_to_page(start),
size >> PAGE_SHIFT, PAGE_KERNEL_RO);
- printk("Write protecting the kernel read-only data: %luk\n",
+ printk(KERN_INFO "Write protecting the kernel read-only data: %luk\n",
size >> 10);

/*
@@ -816,6 +809,7 @@ void mark_rodata_ro(void)
*/
global_flush_tlb();
}
+
#endif

void free_init_pages(char *what, unsigned long begin, unsigned long end)
--
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68


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