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author | Takashi Iwai <tiwai@suse.de> | 2010-02-17 16:24:46 +0300 |
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committer | Takashi Iwai <tiwai@suse.de> | 2010-02-17 16:24:46 +0300 |
commit | 7fb3a069bc5d3577409c2ae89f89cd264ff85816 (patch) | |
tree | 7fe3ba3b95faeecb01e4feafb9288ef4b523c6b3 /mm/truncate.c | |
parent | 291186e049d7f8178ad31d43c38a53889f25d79e (diff) | |
parent | 9d3415a8cc76ff65c6602a121ac318432c5cd7ba (diff) | |
download | linux-7fb3a069bc5d3577409c2ae89f89cd264ff85816.tar.xz |
Merge branch 'fix/misc' into topic/misc
Conflicts:
sound/pci/hda/patch_realtek.c
Diffstat (limited to 'mm/truncate.c')
-rw-r--r-- | mm/truncate.c | 30 |
1 files changed, 14 insertions, 16 deletions
diff --git a/mm/truncate.c b/mm/truncate.c index 342deee22684..e87e37244829 100644 --- a/mm/truncate.c +++ b/mm/truncate.c @@ -522,22 +522,20 @@ EXPORT_SYMBOL_GPL(invalidate_inode_pages2); */ void truncate_pagecache(struct inode *inode, loff_t old, loff_t new) { - if (new < old) { - struct address_space *mapping = inode->i_mapping; - - /* - * unmap_mapping_range is called twice, first simply for - * efficiency so that truncate_inode_pages does fewer - * single-page unmaps. However after this first call, and - * before truncate_inode_pages finishes, it is possible for - * private pages to be COWed, which remain after - * truncate_inode_pages finishes, hence the second - * unmap_mapping_range call must be made for correctness. - */ - unmap_mapping_range(mapping, new + PAGE_SIZE - 1, 0, 1); - truncate_inode_pages(mapping, new); - unmap_mapping_range(mapping, new + PAGE_SIZE - 1, 0, 1); - } + struct address_space *mapping = inode->i_mapping; + + /* + * unmap_mapping_range is called twice, first simply for + * efficiency so that truncate_inode_pages does fewer + * single-page unmaps. However after this first call, and + * before truncate_inode_pages finishes, it is possible for + * private pages to be COWed, which remain after + * truncate_inode_pages finishes, hence the second + * unmap_mapping_range call must be made for correctness. + */ + unmap_mapping_range(mapping, new + PAGE_SIZE - 1, 0, 1); + truncate_inode_pages(mapping, new); + unmap_mapping_range(mapping, new + PAGE_SIZE - 1, 0, 1); } EXPORT_SYMBOL(truncate_pagecache); |