linux-stable/arch/metag
Naoya Horiguchi c177c81e09 hugetlb: restrict hugepage_migration_support() to x86_64
Currently hugepage migration is available for all archs which support
pmd-level hugepage, but testing is done only for x86_64 and there're
bugs for other archs.  So to avoid breaking such archs, this patch
limits the availability strictly to x86_64 until developers of other
archs get interested in enabling this feature.

Simply disabling hugepage migration on non-x86_64 archs is not enough to
fix the reported problem where sys_move_pages() hits the BUG_ON() in
follow_page(FOLL_GET), so let's fix this by checking if hugepage
migration is supported in vma_migratable().

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Reported-by: Michael Ellerman <mpe@ellerman.id.au>
Tested-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: David Miller <davem@davemloft.net>
Cc: <stable@vger.kernel.org>	[3.12+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-06-04 16:53:51 -07:00
..
boot metag: tz1090: instantiate gpio-tz1090-pdc 2013-07-22 10:55:31 +01:00
configs metag: minimal TZ1090 (Comet) SoC infrastructure 2013-06-13 12:14:07 +01:00
include Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next 2014-06-03 14:00:15 -07:00
kernel of/fdt: consolidate built-in dtb section variables 2014-04-30 00:59:13 -05:00
lib metag: move EXPORT_SYMBOL(csum_partial) to metag_ksyms.c 2013-07-04 10:00:02 +01:00
mm hugetlb: restrict hugepage_migration_support() to x86_64 2014-06-04 16:53:51 -07:00
oprofile metag: OProfile support 2013-03-15 13:21:05 +00:00
tbx metag: handle low level kicks directly 2013-11-06 10:40:02 +00:00
Kconfig Kconfig: rename HAS_IOPORT to HAS_IOPORT_MAP 2014-04-07 16:36:11 -07:00
Kconfig.debug consolidate per-arch stack overflow debugging options 2013-07-04 11:25:39 -07:00
Kconfig.soc metag: tz1090: select and instantiate gpio-tz1090 2013-07-22 10:55:31 +01:00
Makefile metag: minimal TZ1090 (Comet) SoC infrastructure 2013-06-13 12:14:07 +01:00