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authorMatthew Wilcox <willy@infradead.org>2018-01-31 16:17:36 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2018-01-31 17:18:37 -0800
commit977fbdcd5986c9ff700bf276644d2b1973a53348 (patch)
tree312bd6dd7f6a528759dad4b2da27eaf9ff339b12 /mm/nommu.c
parenta365ac09d334389bc69841c9d153f03fa2442f1c (diff)
downloadlinux-977fbdcd5986c9ff700bf276644d2b1973a53348.tar.bz2
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.c7
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();