]> git.openfabrics.org - ~shefty/rdma-dev.git/commit
tmpfs: simplify unuse and writepage
authorHugh Dickins <hughd@google.com>
Tue, 26 Jul 2011 00:12:37 +0000 (17:12 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 26 Jul 2011 03:57:11 +0000 (20:57 -0700)
commit48f170fb7d7db8789ccc23e051af61f62af5f685
treed4dcb91583b7b831a20deed6979be713ad2892b7
parent27ab700626f048407e9466d389a43c7d3aa45967
tmpfs: simplify unuse and writepage

shmem_unuse_inode() and shmem_writepage() contain a little code to cope
with pages inserted independently into the filecache, probably by a
filesystem stacked on top of tmpfs, then fed to its ->readpage() or
->writepage().

Unionfs was indeed experimenting with working in that way three years ago,
but I find no current examples: nowadays the stacking filesystems use vfs
interfaces to the lower filesystem.

It's now illegal: remove most of that code, adding some WARN_ON_ONCEs.

Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: Erez Zadok <ezk@fsl.cs.sunysb.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/shmem.c