diff options
author | Ingo Molnar <mingo@elte.hu> | 2010-02-08 08:55:43 +0100 |
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committer | Ingo Molnar <mingo@elte.hu> | 2010-02-08 08:55:46 +0100 |
commit | 6d3e0907b8b239d16720d144e2675ecf10d3bc3b (patch) | |
tree | e0b0743b5f6f82b057cafc4f3687396a6e01a0b4 /mm/truncate.c | |
parent | 23577256953c870de9b724c3a2611ce7be6a1e4e (diff) | |
parent | 50200df462023b187d80a99a52f5f2cfe3c86c26 (diff) |
Merge branch 'sched/urgent' into sched/core
Merge reason: Merge dependent fix, update to latest -rc.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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); |