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Subject[PATCH 2/14] mm: move vmtruncate_range to truncate.c
You would expect to find vmtruncate_range() next to vmtruncate()
in mm/truncate.c: move it there.

Signed-off-by: Hugh Dickins <hughd@google.co>
---
mm/memory.c | 24 ------------------------
mm/truncate.c | 24 ++++++++++++++++++++++++
2 files changed, 24 insertions(+), 24 deletions(-)
--- linux.orig/mm/memory.c 2011-05-30 13:56:10.416798124 -0700
+++ linux/mm/memory.c 2011-05-30 14:09:52.908876549 -0700
@@ -2796,30 +2796,6 @@ void unmap_mapping_range(struct address_
}
EXPORT_SYMBOL(unmap_mapping_range);

-int vmtruncate_range(struct inode *inode, loff_t offset, loff_t end)
-{
- struct address_space *mapping = inode->i_mapping;
-
- /*
- * If the underlying filesystem is not going to provide
- * a way to truncate a range of blocks (punch a hole) -
- * we should return failure right now.
- */
- if (!inode->i_op->truncate_range)
- return -ENOSYS;
-
- mutex_lock(&inode->i_mutex);
- down_write(&inode->i_alloc_sem);
- unmap_mapping_range(mapping, offset, (end - offset), 1);
- truncate_inode_pages_range(mapping, offset, end);
- unmap_mapping_range(mapping, offset, (end - offset), 1);
- inode->i_op->truncate_range(inode, offset, end);
- up_write(&inode->i_alloc_sem);
- mutex_unlock(&inode->i_mutex);
-
- return 0;
-}
-
/*
* We enter with non-exclusive mmap_sem (to exclude vma changes,
* but allow concurrent faults), and pte mapped but not yet locked.
--- linux.orig/mm/truncate.c 2011-05-30 14:08:46.612547848 -0700
+++ linux/mm/truncate.c 2011-05-30 14:09:52.912876640 -0700
@@ -605,3 +605,27 @@ int vmtruncate(struct inode *inode, loff
return 0;
}
EXPORT_SYMBOL(vmtruncate);
+
+int vmtruncate_range(struct inode *inode, loff_t offset, loff_t end)
+{
+ struct address_space *mapping = inode->i_mapping;
+
+ /*
+ * If the underlying filesystem is not going to provide
+ * a way to truncate a range of blocks (punch a hole) -
+ * we should return failure right now.
+ */
+ if (!inode->i_op->truncate_range)
+ return -ENOSYS;
+
+ mutex_lock(&inode->i_mutex);
+ down_write(&inode->i_alloc_sem);
+ unmap_mapping_range(mapping, offset, (end - offset), 1);
+ truncate_inode_pages_range(mapping, offset, end);
+ unmap_mapping_range(mapping, offset, (end - offset), 1);
+ inode->i_op->truncate_range(inode, offset, end);
+ up_write(&inode->i_alloc_sem);
+ mutex_unlock(&inode->i_mutex);
+
+ return 0;
+}

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