From: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>,
Andi Kleen <andi@firstfloor.org>,
pageexec@freemail.hu
Subject: [patch 10/11] Text Edit Lock - i386 standardize debug rodata
Date: Tue, 18 Sep 2007 17:06:11 -0400 [thread overview]
Message-ID: <20070918210737.856251901@polymtl.ca> (raw)
In-Reply-To: 20070918210601.028313546@polymtl.ca
[-- Attachment #1: text-edit-lock-i386-standardize-debug-rodata.patch --]
[-- Type: text/plain, Size: 1722 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
---
arch/i386/mm/init.c | 17 +++++------------
1 file changed, 5 insertions(+), 12 deletions(-)
Index: linux-2.6-lttng/arch/i386/mm/init.c
===================================================================
--- linux-2.6-lttng.orig/arch/i386/mm/init.c 2007-08-19 22:28:00.000000000 -0400
+++ linux-2.6-lttng/arch/i386/mm/init.c 2007-08-19 22:34:39.000000000 -0400
@@ -794,23 +794,15 @@ 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("Write protecting the kernel text: %luk\n", size >> 10);
+
start += size;
size = (unsigned long)__end_rodata - start;
change_page_attr(virt_to_page(start),
@@ -826,6 +818,7 @@ 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
next prev parent reply other threads:[~2007-09-18 21:08 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-18 21:06 [patch 00/11] Text Edit Lock for 2.6.23-rc6-mm1 Mathieu Desnoyers
2007-09-18 21:06 ` [patch 01/11] Kprobes - use a mutex to protect the instruction pages list Mathieu Desnoyers
2007-09-18 21:06 ` [patch 02/11] Kprobes - do not use kprobes mutex in arch code Mathieu Desnoyers
2007-09-18 21:06 ` [patch 03/11] Kprobes - declare kprobe_mutex static Mathieu Desnoyers
2007-09-18 21:06 ` [patch 04/11] Add INIT_ARRAY() to kernel.h Mathieu Desnoyers
2007-09-18 21:06 ` [patch 05/11] Text Edit Lock - Architecture Independent Code Mathieu Desnoyers
2007-09-18 21:06 ` [patch 06/11] Text Edit Lock - Alternative code for i386 and x86_64 Mathieu Desnoyers
2007-09-18 21:06 ` [patch 07/11] Text Edit Lock - kprobes architecture independent support Mathieu Desnoyers
2007-09-18 21:06 ` [patch 08/11] Text Edit Lock - kprobes i386 Mathieu Desnoyers
2007-09-18 21:06 ` [patch 09/11] Text Edit Lock - kprobes x86_64 Mathieu Desnoyers
2007-09-18 21:06 ` Mathieu Desnoyers [this message]
2007-09-18 21:06 ` [patch 11/11] Text Edit Lock - x86_64 standardize debug rodata Mathieu Desnoyers
2007-09-20 23:10 ` [patch 00/11] Text Edit Lock for 2.6.23-rc6-mm1 Andrew Morton
2007-09-21 17:29 ` Christoph Hellwig
2007-09-21 18:11 ` Mathieu Desnoyers
-- strict thread matches above, loose matches on Subject: below --
2007-09-17 18:40 [patch 00/11] Text Edit Lock Mathieu Desnoyers
2007-09-17 18:40 ` [patch 10/11] Text Edit Lock - i386 standardize debug rodata Mathieu Desnoyers
2007-08-20 20:19 [patch 00/11] Text Edit Lock / text poke Mathieu Desnoyers
2007-08-20 20:19 ` [patch 10/11] Text Edit Lock - i386 standardize debug rodata Mathieu Desnoyers
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