linux-kernel - [PATCH 2/5] mm/hugetlb: remove unused arch hook prepare/release

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Date:	Thu, 28 May 2015 13:52:34 +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 2/5] mm/hugetlb: remove unused arch hook prepare/release_hugepage

With s390 dropping support for emulated hugepages, the last user of
arch_prepare_hugepage and arch_release_hugepage is gone.

Acked-by: Martin Schwidefsky <schwidefsky@...ibm.com>
Signed-off-by: Dominik Dingel <dingel@...ux.vnet.ibm.com>
---
 mm/hugetlb.c | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 290984b..a97958e 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -917,7 +917,6 @@ static void update_and_free_page(struct hstate *h, struct page *page)
 		destroy_compound_gigantic_page(page, huge_page_order(h));
 		free_gigantic_page(page, huge_page_order(h));
 	} else {
-		arch_release_hugepage(page);
 		__free_pages(page, huge_page_order(h));
 	}
 }
@@ -1102,10 +1101,6 @@ static struct page *alloc_fresh_huge_page_node(struct hstate *h, int nid)
 						__GFP_REPEAT|__GFP_NOWARN,
 		huge_page_order(h));
 	if (page) {
-		if (arch_prepare_hugepage(page)) {
-			__free_pages(page, huge_page_order(h));
-			return NULL;
-		}
 		prep_new_huge_page(h, page, nid);
 	}
 
@@ -1257,11 +1252,6 @@ static struct page *alloc_buddy_huge_page(struct hstate *h, int nid)
 			htlb_alloc_mask(h)|__GFP_COMP|__GFP_THISNODE|
 			__GFP_REPEAT|__GFP_NOWARN, huge_page_order(h));
 
-	if (page && arch_prepare_hugepage(page)) {
-		__free_pages(page, huge_page_order(h));
-		page = NULL;
-	}
-
 	spin_lock(&hugetlb_lock);
 	if (page) {
 		INIT_LIST_HEAD(&page->lru);
-- 
2.3.7

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