mm/hugetlb: clean up ARCH_HAS_GIGANTIC_PAGE
authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Thu, 6 Jul 2017 22:39:17 +0000 (15:39 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 6 Jul 2017 23:24:33 +0000 (16:24 -0700)
commite1073d1e7920946ac4776a619cc40668b9e1401b
treef4d85b7801ea09471ce907faf1f16a0113d79fdd
parent9017217b6f45e9045b2621b02cbc5605a566b803
mm/hugetlb: clean up ARCH_HAS_GIGANTIC_PAGE

This moves the #ifdef in C code to a Kconfig dependency.  Also we move
the gigantic_page_supported() function to be arch specific.

This allows architectures to conditionally enable runtime allocation of
gigantic huge page.  Architectures like ppc64 supports different
gigantic huge page size (16G and 1G) based on the translation mode
selected.  This provides an opportunity for ppc64 to enable runtime
allocation only w.r.t 1G hugepage.

No functional change in this patch.

Link: http://lkml.kernel.org/r/1494995292-4443-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arch/arm64/Kconfig
arch/arm64/include/asm/hugetlb.h
arch/s390/Kconfig
arch/s390/include/asm/hugetlb.h
arch/x86/Kconfig
arch/x86/include/asm/hugetlb.h
mm/hugetlb.c