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authorLinus Walleij <linus.walleij@linaro.org>2011-09-29 09:37:23 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2011-10-01 17:49:18 +0100
commit002ea9eefec98dada56fd5f8e432a4e8570c2a26 (patch)
treed97e36ac8ad876269cd26d28c0d368c0ec35c75e
parent47ea91b4052d9e94b9dca5d7a3d947fbebd07ba9 (diff)
downloadlinux-linaro-002ea9eefec98dada56fd5f8e432a4e8570c2a26.tar.gz
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>
-rw-r--r--arch/arm/mm/init.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index cc7e2d8be9a..f8037ba338a 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -496,6 +496,13 @@ static void __init free_unused_memmap(struct meminfo *mi)
*/
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