linux/arch/arm64
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 mfd: vexpress: Convert custom func API to regmap 2014-05-15 17:02:18 +01:00
configs arm64: defconfig: Expand default enabled features 2014-02-07 17:17:28 +00:00
include Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial into next 2014-06-04 08:50:34 -07:00
kernel At over 200 commits, covering almost all supported architectures, this 2014-06-04 08:47:12 -07:00
kvm arm64: KVM: Enable minimalistic support for Cortex-A53 2014-05-25 20:05:30 +02:00
lib arm64: atomics: fix use of acquire + release for full barrier semantics 2014-02-07 16:45:43 +00:00
mm hugetlb: restrict hugepage_migration_support() to x86_64 2014-06-04 16:53:51 -07:00
xen arm: xen: implement multicall hypercall support. 2014-04-24 13:09:46 +01:00
Kconfig Merge 3.15-rc3 into tty-next 2014-04-27 21:40:39 -07:00
Kconfig.debug arm64: remove arch specific earlyprintk 2014-04-24 16:32:27 -07:00
Makefile arm64: big-endian: add big-endian support to top-level arch Makefile 2013-10-25 15:59:31 +01:00