diff options
| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2015-02-10 14:09:49 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-10 14:30:30 -0800 |
| commit | 8a5f14a23177061ec11daeaa3d09d0765d785c47 (patch) | |
| tree | 5199ffd75455cc98b652767813d07e64e6895c4e /mm/madvise.c | |
| parent | c8d78c1823f46519473949d33f0d1d33fe21ea16 (diff) | |
mm: drop support of non-linear mapping from unmap/zap codepath
We have remap_file_pages(2) emulation in -mm tree for few release cycles
and we plan to have it mainline in v3.20. This patchset removes rest of
VM_NONLINEAR infrastructure.
Patches 1-8 take care about generic code. They are pretty
straight-forward and can be applied without other of patches.
Rest patches removes pte_file()-related stuff from architecture-specific
code. It usually frees up one bit in non-present pte. I've tried to reuse
that bit for swap offset, where I was able to figure out how to do that.
For obvious reason I cannot test all that arch-specific code and would
like to see acks from maintainers.
In total, remap_file_pages(2) required about 1.4K lines of not-so-trivial
kernel code. That's too much for functionality nobody uses.
Tested-by: Felipe Balbi <balbi@ti.com>
This patch (of 38):
We don't create non-linear mappings anymore. Let's drop code which
handles them on unmap/zap.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/madvise.c')
| -rw-r--r-- | mm/madvise.c | 9 |
1 files changed, 1 insertions, 8 deletions
diff --git a/mm/madvise.c b/mm/madvise.c index a271adc93289..917754d26c17 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -278,14 +278,7 @@ static long madvise_dontneed(struct vm_area_struct *vma, if (vma->vm_flags & (VM_LOCKED|VM_HUGETLB|VM_PFNMAP)) return -EINVAL; - if (unlikely(vma->vm_flags & VM_NONLINEAR)) { - struct zap_details details = { - .nonlinear_vma = vma, - .last_index = ULONG_MAX, - }; - zap_page_range(vma, start, end - start, &details); - } else - zap_page_range(vma, start, end - start, NULL); + zap_page_range(vma, start, end - start, NULL); return 0; } |