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    Contents of /trunk/kernel26-xen/patches-2.6.25-r1/1115-2.6.25-xen-Make-xen_start_info-read-only.patch

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    Revision 606 - (show annotations) (download)
    Thu May 22 23:13:13 2008 UTC (16 years ago) by niro
    File size: 966 byte(s) 
    -ver bump to 2.6.25-magellan-r1:
- linux-2.6.25.4
- fbcondecor-0.9.4
- squashfs-3.3
- unionfs-2.3.3
- tuxonice-3.0-rc7
- linux-phc-0.3.0
- acpi-dstd-0.9a
- reiser4
- xen-3.2.0
. ipw3945-1.2.2
    1 From e353e5b752fdf09a53678852fba4c6aeca0521fc Mon Sep 17 00:00:00 2001
    2 From: Eduardo Habkost <ehabkost@redhat.com>
    3 Date: Mon, 14 Jan 2008 20:20:55 -0200
    4 Subject: [PATCH] Make xen_start_info read-only
    5
    6 It will aid debugging, catching if anybody tries to write to it.
    7
    8 Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
    9 ---
    10 arch/x86/mm/init_64.c | 6 ++++++
    11 1 files changed, 6 insertions(+), 0 deletions(-)
    12
    13 diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
    14 index 48f9912..0e017e5 100644
    15 --- a/arch/x86/mm/init_64.c
    16 +++ b/arch/x86/mm/init_64.c
    17 @@ -495,6 +495,12 @@ static void xen_finish_init_mapping(void)
    18 __va(__pa(xen_start_info->mod_start));
    19
    20 xprintk("messed with start_info.\n");
    21 + xprintk("making it read-only:\n");
    22 +
    23 + /* Make it read-only to catch if anybody touches it by accident.
    24 + */
    25 + __make_page_readonly(xen_start_info);
    26 +
    27 xprintk("unmapping:\n");
    28
    29 /* Destroy the Xen-created mappings beyond the kernel image as
    30 --
    31 1.5.4.1
    32