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 11/11] Text Edit Lock - x86_64 standardize debug rodata
Date: Tue, 18 Sep 2007 17:06:12 -0400 [thread overview]
Message-ID: <20070918210738.236758844@polymtl.ca> (raw)
In-Reply-To: 20070918210601.028313546@polymtl.ca
[-- Attachment #1: text-edit-lock-x86_64-standardize-debug-rodata.patch --]
[-- Type: text/plain, Size: 1807 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/x86_64/mm/init.c | 23 +++++------------------
include/asm-x86_64/cacheflush.h | 22 ++++++++++++++++++++++
2 files changed, 27 insertions(+), 18 deletions(-)
Index: linux-2.6-lttng/arch/x86_64/mm/init.c
===================================================================
--- linux-2.6-lttng.orig/arch/x86_64/mm/init.c 2007-08-18 10:02:58.000000000 -0400
+++ linux-2.6-lttng/arch/x86_64/mm/init.c 2007-08-18 10:04:14.000000000 -0400
@@ -598,25 +598,11 @@ void free_initmem(void)
void mark_rodata_ro(void)
{
- unsigned long start = (unsigned long)_stext, end;
+ unsigned long start = PFN_ALIGN(_stext);
+ unsigned long end = PFN_ALIGN(__end_rodata);
-#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;
-
- change_page_attr_addr(start, (end - start) >> PAGE_SHIFT, PAGE_KERNEL_RO);
+ change_page_attr_addr(start, (end - start) >> PAGE_SHIFT,
+ PAGE_KERNEL_RO);
printk(KERN_INFO "Write protecting the kernel read-only data: %luk\n",
(end - start) >> 10);
@@ -629,6 +615,7 @@ void mark_rodata_ro(void)
*/
global_flush_tlb();
}
+
#endif
#ifdef CONFIG_BLK_DEV_INITRD
--
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 21:09 UTC|newest]
Thread overview: 19+ 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 ` [patch 10/11] Text Edit Lock - i386 standardize debug rodata Mathieu Desnoyers
2007-09-18 21:06 ` Mathieu Desnoyers [this message]
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 --
2007-12-06 2:02 [patch 00/11] Text Edit Lock for 2.6.24-rc4-git3 Mathieu Desnoyers
2007-12-06 2:02 ` [patch 11/11] Text Edit Lock - x86_64 standardize debug rodata Mathieu Desnoyers
2007-11-13 18:46 [patch 00/11] Text Edit Lock Mathieu Desnoyers
2007-11-13 18:46 ` [patch 11/11] Text Edit Lock - x86_64 standardize debug rodata Mathieu Desnoyers
2007-09-17 18:40 [patch 00/11] Text Edit Lock Mathieu Desnoyers
2007-09-17 18:40 ` [patch 11/11] Text Edit Lock - x86_64 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 11/11] Text Edit Lock - x86_64 standardize debug rodata Mathieu Desnoyers
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