mm/hugetlb: reduce arch dependent code about huge_pmd_unshare
authorZhang Zhen <zhenzhang.zhang@huawei.com>
Wed, 24 Jun 2015 23:56:13 +0000 (16:56 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 25 Jun 2015 00:49:41 +0000 (17:49 -0700)
commite81f2d22370f8231cb7f13f454bcc8c0eb4e23f2
tree758140f614ebc396e160f858fc37ebddc7475f32
parent36f881883c57941bb32d25cea6524f9612ab5a2c
mm/hugetlb: reduce arch dependent code about huge_pmd_unshare

Currently we have many duplicates in definitions of huge_pmd_unshare.  In
all architectures this function just returns 0 when
CONFIG_ARCH_WANT_HUGE_PMD_SHARE is N.

This patch puts the default implementation in mm/hugetlb.c and lets these
architectures use the common code.

Signed-off-by: Zhang Zhen <zhenzhang.zhang@huawei.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Chris Metcalf <cmetcalf@ezchip.com>
Cc: David Rientjes <rientjes@google.com>
Cc: James Yang <James.Yang@freescale.com>
Cc: Aneesh Kumar <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arch/arm/mm/hugetlbpage.c
arch/arm64/mm/hugetlbpage.c
arch/ia64/mm/hugetlbpage.c
arch/metag/mm/hugetlbpage.c
arch/mips/mm/hugetlbpage.c
arch/powerpc/mm/hugetlbpage.c
arch/s390/mm/hugetlbpage.c
arch/sh/mm/hugetlbpage.c
arch/sparc/mm/hugetlbpage.c
arch/tile/mm/hugetlbpage.c
mm/hugetlb.c