commit 8079b1c859c44f27d63da4951f5038a16589a563
author Hugh Dickins <hughd@google.com> Wed Aug 03 16:21:28 2011 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> Wed Aug 03 14:25:24 2011 -1000
tree 677e77a4c9d3b9c33427196cb5f860ebcf530b15
parent e504f3fdd63d486d45b18009e5a65f2e329acb0a

mm: clarify the radix_tree exceptional cases

Make the radix_tree exceptional cases, mostly in filemap.c, clearer.

It's hard to devise a suitable snappy name that illuminates the use by
shmem/tmpfs for swap, while keeping filemap/pagecache/radix_tree
generality.  And akpm points out that /* radix_tree_deref_retry(page) */
comments look like calls that have been commented out for unknown
reason.

Skirt the naming difficulty by rearranging these blocks to handle the
transient radix_tree_deref_retry(page) case first; then just explain the
remaining shmem/tmpfs swap case in a comment.

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>