linux-kernel - [PATCH 0/5] Remove s390 sw-emulated hugepages and cleanup

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Date:	Thu, 28 May 2015 13:52:32 +0200
From:	Dominik Dingel <dingel@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	Russell King <linux@....linux.org.uk>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	Tony Luck <tony.luck@...el.com>,
	Fenghua Yu <fenghua.yu@...el.com>,
	James Hogan <james.hogan@...tec.com>,
	Ralf Baechle <ralf@...ux-mips.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Michael Ellerman <mpe@...erman.id.au>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	linux390@...ibm.com, "David S. Miller" <davem@...emloft.net>,
	Chris Metcalf <cmetcalf@...hip.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Zhang Zhen <zhenzhang.zhang@...wei.com>,
	Dominik Dingel <dingel@...ux.vnet.ibm.com>,
	David Rientjes <rientjes@...gle.com>,
	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
	Nathan Lynch <nathan_lynch@...tor.com>,
	Christian Borntraeger <borntraeger@...ibm.com>,
	Andy Lutomirski <luto@...capital.net>,
	Michael Holzheu <holzheu@...ux.vnet.ibm.com>,
	Hugh Dickins <hughd@...gle.com>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	Paolo Bonzini <pbonzini@...hat.com>,
	"Jason J. Herne" <jjherne@...ux.vnet.ibm.com>,
	Davidlohr Bueso <dave@...olabs.net>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Luiz Capitulino <lcapitulino@...hat.com>,
	Mike Kravetz <mike.kravetz@...cle.com>,
	linux-arm-kernel@...ts.infradead.org, linux-ia64@...r.kernel.org,
	linux-metag@...r.kernel.org, linux-mips@...ux-mips.org,
	linuxppc-dev@...ts.ozlabs.org, linux-s390@...r.kernel.org,
	linux-sh@...r.kernel.org, sparclinux@...r.kernel.org,
	linux-mm@...ck.org
Subject: [PATCH 0/5] Remove s390 sw-emulated hugepages and cleanup 

Hi everyone,

there is a potential bug with KVM and hugetlbfs if the hardware does not
support hugepages (EDAT1).
We fix this by making EDAT1 a hard requirement for hugepages and 
therefore removing and simplifying code.

As s390, with the sw-emulated hugepages, was the only user of arch_prepare/release_hugepage
I also removed theses calls from common and other architecture code.

Thanks,
    Dominik

Dominik Dingel (5):
  s390/mm: make hugepages_supported a boot time decision
  mm/hugetlb: remove unused arch hook prepare/release_hugepage
  mm/hugetlb: remove arch_prepare/release_hugepage from arch headers
  s390/hugetlb: remove dead code for sw emulated huge pages
  s390/mm: forward check for huge pmds to pmd_large()

 arch/arm/include/asm/hugetlb.h     |  9 ------
 arch/arm64/include/asm/hugetlb.h   |  9 ------
 arch/ia64/include/asm/hugetlb.h    |  9 ------
 arch/metag/include/asm/hugetlb.h   |  9 ------
 arch/mips/include/asm/hugetlb.h    |  9 ------
 arch/powerpc/include/asm/hugetlb.h |  9 ------
 arch/s390/include/asm/hugetlb.h    |  3 --
 arch/s390/include/asm/page.h       |  8 ++---
 arch/s390/kernel/setup.c           |  2 ++
 arch/s390/mm/hugetlbpage.c         | 65 +++-----------------------------------
 arch/s390/mm/pgtable.c             |  2 ++
 arch/sh/include/asm/hugetlb.h      |  9 ------
 arch/sparc/include/asm/hugetlb.h   |  9 ------
 arch/tile/include/asm/hugetlb.h    |  9 ------
 arch/x86/include/asm/hugetlb.h     |  9 ------
 mm/hugetlb.c                       | 10 ------
 16 files changed, 12 insertions(+), 168 deletions(-)

-- 
2.3.7

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