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    Subject[patch 10/11] Text Edit Lock - i386 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
    ---
    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
    -
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