Re: [PATCH v4 02/10] mm, hugetlbfs: Allow an arch to always use generic versions of get_unmapped_area functions

Excerpts from Christophe Leroy's message of December 9, 2021 3:18 am:

Unlike most architectures, powerpc can only define at runtime
if it is going to use the generic arch_get_unmapped_area() or not.

Today, powerpc has a copy of the generic arch_get_unmapped_area()
because when selection HAVE_ARCH_UNMAPPED_AREA the generic
arch_get_unmapped_area() is not available.

Rename it generic_get_unmapped_area() and make it independent of
HAVE_ARCH_UNMAPPED_AREA.

Do the same for arch_get_unmapped_area_topdown() versus
HAVE_ARCH_UNMAPPED_AREA_TOPDOWN.

Do the same for hugetlb_get_unmapped_area() versus
HAVE_ARCH_HUGETLB_UNMAPPED_AREA.

Reviewed-by: Nicholas Piggin <npiggin@gmail.com>

Signed-off-by: Christophe Leroy <redacted>
---
 fs/hugetlbfs/inode.c     | 17 +++++++++++++----
 include/linux/hugetlb.h  |  5 +++++
 include/linux/sched/mm.h |  9 +++++++++
 mm/mmap.c                | 31 ++++++++++++++++++++++++-------
 4 files changed, 51 insertions(+), 11 deletions(-)