]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
thp: remove assumptions on pgtable_t type
authorGerald Schaefer <gerald.schaefer@de.ibm.com>
Mon, 8 Oct 2012 23:30:07 +0000 (16:30 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 9 Oct 2012 07:22:29 +0000 (16:22 +0900)
commite3ebcf64381188a2744a9829a4eb5c2b60f1974c
tree6c2bc18729bd6fc12b93d82403fad6afec319c3b
parent15626062f4a98279c59a2a5208c496cf65cbf8c0
thp: remove assumptions on pgtable_t type

The thp page table pre-allocation code currently assumes that pgtable_t is
of type "struct page *".  This may not be true for all architectures, so
this patch removes that assumption by replacing the functions
prepare_pmd_huge_pte() and get_pmd_huge_pte() with two new functions that
can be defined architecture-specific.

It also removes two VM_BUG_ON checks for page_count() and page_mapcount()
operating on a pgtable_t.  Apart from the VM_BUG_ON removal, there will be
no functional change introduced by this patch.

Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Hillf Danton <dhillf@gmail.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
include/asm-generic/pgtable.h
include/linux/huge_mm.h
mm/huge_memory.c
mm/pgtable-generic.c