From: Hugh Dickins <hughd@google.com>
Date: Tue, 26 Jul 2011 00:12:24 +0000 (-0700)
Subject: mm: tidy vmtruncate_range and related functions
X-Git-Tag: v3.1-rc1~241^2~84
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8a549bea51138be2126a2cc6aabe8f17ef66b79b;p=pandora-kernel.git

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 <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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