forked from Minki/linux
ARM: 7113/1: mm: Align bank start to MAX_ORDER_NR_PAGES
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: stable@kernel.org 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>
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@ -496,6 +496,13 @@ static void __init free_unused_memmap(struct meminfo *mi)
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*/
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bank_start = min(bank_start,
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ALIGN(prev_bank_end, PAGES_PER_SECTION));
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#else
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/*
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* Align down here since the VM subsystem insists that the
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* memmap entries are valid from the bank start aligned to
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* MAX_ORDER_NR_PAGES.
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*/
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bank_start = round_down(bank_start, MAX_ORDER_NR_PAGES);
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#endif
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/*
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* If we had a previous bank, and there is a space
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