diff options
| author | Matthew Wilcox <willy@infradead.org> | 2018-02-01 01:17:36 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-02-01 02:18:37 +0100 |
| commit | 977fbdcd5986c9ff700bf276644d2b1973a53348 (patch) | |
| tree | 312bd6dd7f6a528759dad4b2da27eaf9ff339b12 /mm/nommu.c | |
| parent | mm, userfaultfd, THP: avoid waiting when PMD under THP migration (diff) | |
| download | linux-977fbdcd5986c9ff700bf276644d2b1973a53348.tar.xz linux-977fbdcd5986c9ff700bf276644d2b1973a53348.zip | |
mm: add unmap_mapping_pages()
Several users of unmap_mapping_range() would prefer to express their
range in pages rather than bytes. Unfortuately, on a 32-bit kernel, you
have to remember to cast your page number to a 64-bit type before
shifting it, and four places in the current tree didn't remember to do
that. That's a sign of a bad interface.
Conveniently, unmap_mapping_range() actually converts from bytes into
pages, so hoist the guts of unmap_mapping_range() into a new function
unmap_mapping_pages() and convert the callers which want to use pages.
Link: http://lkml.kernel.org/r/20171206142627.GD32044@bombadil.infradead.org
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Reported-by: "zhangyi (F)" <yi.zhang@huawei.com>
Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Acked-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/nommu.c')
| -rw-r--r-- | mm/nommu.c | 7 |
1 files changed, 0 insertions, 7 deletions
diff --git a/mm/nommu.c b/mm/nommu.c index 17c00d93de2e..4b9864b17cb0 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -1788,13 +1788,6 @@ unsigned long arch_get_unmapped_area(struct file *file, unsigned long addr, return -ENOMEM; } -void unmap_mapping_range(struct address_space *mapping, - loff_t const holebegin, loff_t const holelen, - int even_cows) -{ -} -EXPORT_SYMBOL(unmap_mapping_range); - int filemap_fault(struct vm_fault *vmf) { BUG(); |