rfc -> v1: Fix s390 compilation errors
Tested on s390
v1 -> v2: Rebased on top of mm-unstable
Fix sparc64 compilation errors
v2 -> v3: Rebased on top of mm-unstable
Fix bug reported by Lorenzo Stoakes
This is an attempt to get rid of a fair amount of duplicated code
wrt. hugetlb and *get_unmapped_area* functions.
HugeTLB registers a .get_unmapped_area function which gets called from
__get_unmapped_area().
hugetlb_get_unmapped_area() is defined by a bunch of architectures and
it also has a generic definition for those that do not define it.
Short-long story is that there is a ton of duplicated code between
specific hugetlb *_get_unmapped_area_* functions and mm-core functions,
so we can do better by teaching arch_get_unmapped_area* functions how
to deal with hugetlb mappings.
Note that not a lot of things need to be taught though.
hugetlb_get_unmapped_area, that gets called for hugetlb mappings,
runs some sanity checks prior to calling mm_get_unmapped_area_vmflags(),
so we do not need to that down the road in the respective
{generic,arch}_get_unmapped_area* functions.
More information can be found in the respective patches.
LTP mmapstress hugetlb selftests were ran succesfully on:
- arm64
- powerpc64
- s390
- x86_64
Oscar Salvador (9):
mm/mmap: Teach generic_get_unmapped_area{_topdown} to handle hugetlb
mappings
arch/s390: Teach arch_get_unmapped_area{_topdown} to handle hugetlb
mappings
arch/x86: Teach arch_get_unmapped_area_vmflags to handle hugetlb
mappings
arch/sparc: Teach arch_get_unmapped_area{_topdown} to handle hugetlb
mappings
arch/powerpc: Teach book3s64 arch_get_unmapped_area{_topdown} to
handle hugetlb mappings
mm: Make hugetlb mappings go through mm_get_unmapped_area_vmflags
mm: Drop hugetlb_get_unmapped_area{_*} functions
arch/s390: Clean up hugetlb definitions
mm: Consolidate common checks in hugetlb_get_unmapped_area
arch/loongarch/include/asm/hugetlb.h | 4 -
arch/mips/include/asm/hugetlb.h | 4 -
arch/parisc/include/asm/hugetlb.h | 15 ----
arch/parisc/mm/hugetlbpage.c | 21 ------
arch/powerpc/mm/book3s64/slice.c | 50 ++++++++-----
arch/s390/include/asm/hugetlb.h | 73 ++++--------------
arch/s390/mm/hugetlbpage.c | 85 ---------------------
arch/s390/mm/mmap.c | 9 ++-
arch/sh/include/asm/hugetlb.h | 15 ----
arch/sparc/kernel/sys_sparc_32.c | 17 ++++-
arch/sparc/kernel/sys_sparc_64.c | 37 +++++++--
arch/sparc/mm/hugetlbpage.c | 108 ---------------------------
arch/x86/kernel/sys_x86_64.c | 24 ++++--
arch/x86/mm/hugetlbpage.c | 101 -------------------------
fs/hugetlbfs/inode.c | 94 +++--------------------
include/asm-generic/hugetlb.h | 15 ++--
include/linux/hugetlb.h | 22 +++---
mm/mmap.c | 4 +
18 files changed, 145 insertions(+), 553 deletions(-)
--
2.46.0
