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mm: tidy vmtruncate_range and related functions
Use consistent variable names in truncate_pagecache(), truncate_setsize(), vmtruncate() and vmtruncate_range(). unmap_mapping_range() and vmtruncate_range() have mismatched interfaces: don't change either, but make the vmtruncates more precise about what they expect unmap_mapping_range() to do. vmtruncate_range() is currently called only with page-aligned start and end+1: can handle unaligned start, but unaligned end+1 would hit BUG_ON in truncate_inode_pages_range() (lacks partial clearing of the end page). Signed-off-by: Hugh Dickins <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
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