linux/arch/sparc/mm
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
..
Makefile sparc32: introduce run-time patching of srmmu access functions 2012-05-27 23:52:49 -07:00
extable.c sparc: Add module.h to files previously implicitly using it. 2011-10-31 19:30:54 -04:00
fault_32.c arch: mm: pass userspace fault flag to generic fault handler 2013-09-12 15:38:01 -07:00
fault_64.c sparc64: Don't bark so loudly about 32-bit tasks generating 64-bit fault addresses. 2014-05-06 21:27:37 -07:00
gup.c sparc64: Fix bugs in get_user_pages_fast() wrt. THP. 2014-05-03 22:32:37 -07:00
highmem.c sparc32: move kmap_init() to highmem.c 2012-07-26 16:46:17 -07:00
hugetlbpage.c hugetlb: restrict hugepage_migration_support() to x86_64 2014-06-04 16:53:51 -07:00
hypersparc.S [PATCH] sparc32: vm_area_struct access for old Sun SPARCs. 2013-07-10 13:56:10 -07:00
init_32.c mm/SPARC: prepare for removing num_physpages and simplify mem_init() 2013-07-03 16:07:37 -07:00
init_64.c sparc64: Use 'ILOG2_4MB' instead of constant '22'. 2014-05-03 22:52:50 -07:00
init_64.h sparc64: Document the shift counts used to validate linear kernel addresses. 2013-11-12 15:22:34 -08:00
io-unit.c sparc32: Convert mmu_* interfaces from btfixup to method ops. 2012-05-13 13:57:05 -07:00
iommu.c sparc/iommu: fix typo s/265KB/256KB/ 2013-03-31 19:29:12 -04:00
leon_mm.c sparc32: srmmu_probe now knows about leon too 2012-05-27 23:52:51 -07:00
srmmu.c sparc32: make copy_to/from_user_page() usable from modular code 2014-02-19 19:49:48 -05:00
srmmu.h sparc32,leon: move leon mmu functions to leon_mm.c 2012-05-19 23:27:38 -07:00
srmmu_access.S sparc32: introduce run-time patching of srmmu access functions 2012-05-27 23:52:49 -07:00
swift.S [PATCH] sparc32: vm_area_struct access for old Sun SPARCs. 2013-07-10 13:56:10 -07:00
tlb.c sparc64: Fix huge PMD invalidation. 2014-05-03 22:31:52 -07:00
tsb.c sparc64: Fix huge TSB mapping on pre-UltraSPARC-III cpus. 2014-05-08 14:59:07 -07:00
tsunami.S [PATCH] sparc32: vm_area_struct access for old Sun SPARCs. 2013-07-10 13:56:10 -07:00
ultra.S sparc64: Make PAGE_OFFSET variable. 2013-11-12 15:22:34 -08:00
viking.S [PATCH] sparc32: vm_area_struct access for old Sun SPARCs. 2013-07-10 13:56:10 -07:00