[PATCH] rewrite of truncate_inode_pages

Hi this patch does: - it moke use of the same locking for partial & complete pages, the old version did busy-waiting in the case that the partial page was locked. - rewrites truncate_inodes_pages() using 2 auxiliar functions: * truncate_partial_page() that truncates a partial

[PATCH] rewrite of truncate_inode_pages

Hi this patch does: - it moke use of the same locking for partial complete pages, the old version did busy-waiting in the case that the partial page was locked. - rewrites truncate_inodes_pages() using 2 auxiliar functions: * truncate_partial_page() that truncates a partial page