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| 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 /include | |
| parent | mm: replace remap_file_pages() syscall with emulation (diff) | |
| download | linux-dev-8a5f14a23177061ec11daeaa3d09d0765d785c47.tar.xz linux-dev-8a5f14a23177061ec11daeaa3d09d0765d785c47.zip | |
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 'include')
| -rw-r--r-- | include/linux/mm.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 2c6fd3c5424a..600ef5ed4698 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1146,7 +1146,6 @@ extern void user_shm_unlock(size_t, struct user_struct *); * Parameter block passed down to zap_pte_range in exceptional cases. */ struct zap_details { - struct vm_area_struct *nonlinear_vma; /* Check page->index if set */ struct address_space *check_mapping; /* Check page->mapping if set */ pgoff_t first_index; /* Lowest page->index to unmap */ pgoff_t last_index; /* Highest page->index to unmap */ |