]> err.no Git - linux-2.6/commit
hugetlb: call arch_prepare_hugepage() for surplus pages
authorGerald Schaefer <gerald.schaefer@de.ibm.com>
Tue, 12 Aug 2008 22:08:38 +0000 (15:08 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 12 Aug 2008 23:07:27 +0000 (16:07 -0700)
commitcaff3a2c333e11a794308bd9a875a09b94fee24a
tree3cc787b8b61913bc6b93b28eafd963f786d96b53
parent02eb7eeb8990b9cbd32c7bc1ef2d431ca390e44a
hugetlb: call arch_prepare_hugepage() for surplus pages

The s390 software large page emulation implements shared page tables by
using page->index of the first tail page from a compound large page to
store page table information.  This is set up in arch_prepare_hugepage(),
which is called from alloc_fresh_huge_page_node().

A similar call to arch_prepare_hugepage() is missing for surplus large
pages that are allocated in alloc_buddy_huge_page(), which breaks the
software emulation mode for (surplus) large pages on s390.  This patch
adds the missing call to arch_prepare_hugepage().  It will have no effect
on other architectures where arch_prepare_hugepage() is a nop.

Also, use the correct order in the error path in alloc_fresh_huge_page_node().

Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Acked-by: Nick Piggin <npiggin@suse.de>
Acked-by: Adam Litke <agl@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/hugetlb.c