]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commit
rmap: fix compound check logic in page_remove_file_rmap
authorSteve Capper <steve.capper@arm.com>
Wed, 10 Aug 2016 23:27:55 +0000 (16:27 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 10 Aug 2016 23:40:56 +0000 (16:40 -0700)
commit57dea93ac42d341e1fe902528b348ef6763fa485
tree0652d7e6e82697150eeb2fede8c9fbe7fe4af777
parentc8efc390c1e0eca195ae59a2f7cec46773620e0c
rmap: fix compound check logic in page_remove_file_rmap

In page_remove_file_rmap(.) we have the following check:

  VM_BUG_ON_PAGE(compound && !PageTransHuge(page), page);

This is meant to check for either HugeTLB pages or THP when a compound
page is passed in.

Unfortunately, if one disables CONFIG_TRANSPARENT_HUGEPAGE, then
PageTransHuge(.) will always return false, provoking BUGs when one runs
the libhugetlbfs test suite.

This patch replaces PageTransHuge(), with PageHead() which will work for
both HugeTLB and THP.

Fixes: dd78fedde4b9 ("rmap: support file thp")
Link: http://lkml.kernel.org/r/1470838217-5889-1-git-send-email-steve.capper@arm.com
Signed-off-by: Steve Capper <steve.capper@arm.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Huang Shijie <shijie.huang@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/rmap.c