[rfc-patch 10/11] Text Edit Lock - x86_32 standardize debug rodata

[Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>]

[-- Attachment #1: text-edit-lock-i386-standardize-debug-rodata.patch --]
[-- Type: text/plain, Size: 2062 bytes --]

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