Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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.com>
Acked-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
authored by
Hugh Dickins
and committed by
Linus Torvalds
5b8ba101
4d258b25
+24
-24
-24
mm/memory.c
-24
mm/memory.c
···
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}
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EXPORT_SYMBOL(unmap_mapping_range);
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2801
-
int vmtruncate_range(struct inode *inode, loff_t offset, loff_t end)
2802
-
{
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-
struct address_space *mapping = inode->i_mapping;
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-
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-
/*
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-
* If the underlying filesystem is not going to provide
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-
* a way to truncate a range of blocks (punch a hole) -
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* we should return failure right now.
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-
*/
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if (!inode->i_op->truncate_range)
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return -ENOSYS;
2812
-
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-
mutex_lock(&inode->i_mutex);
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-
down_write(&inode->i_alloc_sem);
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-
unmap_mapping_range(mapping, offset, (end - offset), 1);
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-
truncate_inode_pages_range(mapping, offset, end);
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-
unmap_mapping_range(mapping, offset, (end - offset), 1);
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-
inode->i_op->truncate_range(inode, offset, end);
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-
up_write(&inode->i_alloc_sem);
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-
mutex_unlock(&inode->i_mutex);
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-
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return 0;
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-
}
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-
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/*
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* We enter with non-exclusive mmap_sem (to exclude vma changes,
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* but allow concurrent faults), and pte mapped but not yet locked.
+24
mm/truncate.c
+24
mm/truncate.c
···
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return 0;
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}
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EXPORT_SYMBOL(vmtruncate);
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+
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+
int vmtruncate_range(struct inode *inode, loff_t offset, loff_t end)
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+
{
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+
struct address_space *mapping = inode->i_mapping;
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+
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+
/*
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+
* If the underlying filesystem is not going to provide
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+
* a way to truncate a range of blocks (punch a hole) -
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+
* we should return failure right now.
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+
*/
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+
if (!inode->i_op->truncate_range)
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+
return -ENOSYS;
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+
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+
mutex_lock(&inode->i_mutex);
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+
down_write(&inode->i_alloc_sem);
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+
unmap_mapping_range(mapping, offset, (end - offset), 1);
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+
truncate_inode_pages_range(mapping, offset, end);
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+
unmap_mapping_range(mapping, offset, (end - offset), 1);
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+
inode->i_op->truncate_range(inode, offset, end);
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+
up_write(&inode->i_alloc_sem);
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+
mutex_unlock(&inode->i_mutex);
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+
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+
return 0;
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+
}