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    Subject[01/27] ARM: 7113/1: mm: Align bank start to MAX_ORDER_NR_PAGES
    3.0-stable review patch.  If anyone has any objections, please let us know.

    ------------------

    From: Linus Walleij <linus.walleij@linaro.org>

    commit 002ea9eefec98dada56fd5f8e432a4e8570c2a26 upstream.

    The VM subsystem assumes that there are valid memmap entries from
    the bank start aligned to MAX_ORDER_NR_PAGES.

    On the Ux500 we have a lot of mem=N arguments on the commandline
    triggering this bug several times over and causing kernel
    oops messages.

    Cc: Michael Bohan <mbohan@codeaurora.org>
    Cc: Nicolas Pitre <nico@fluxnic.net>
    Signed-off-by: Johan Palsson <johan.palsson@stericsson.com>
    Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
    Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
    Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

    ---
    arch/arm/mm/init.c | 7 +++++++
    1 file changed, 7 insertions(+)

    --- a/arch/arm/mm/init.c
    +++ b/arch/arm/mm/init.c
    @@ -473,6 +473,13 @@ static void __init free_unused_memmap(st
    */
    bank_start = min(bank_start,
    ALIGN(prev_bank_end, PAGES_PER_SECTION));
    +#else
    + /*
    + * Align down here since the VM subsystem insists that the
    + * memmap entries are valid from the bank start aligned to
    + * MAX_ORDER_NR_PAGES.
    + */
    + bank_start = round_down(bank_start, MAX_ORDER_NR_PAGES);
    #endif
    /*
    * If we had a previous bank, and there is a space



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