initmpfs: make rootfs use tmpfs when CONFIG_TMPFS enabled
authorRob Landley <rob@landley.net>
Wed, 11 Sep 2013 21:26:12 +0000 (14:26 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 11 Sep 2013 22:59:37 +0000 (15:59 -0700)
commit16203a7a9422315bc929461503e3a046459ea5ff
treef32de38261ac95e4ac3467595a3f7be445b02797
parent57f150a58c40cda598c31af8bceb8598f43c3e5f
initmpfs: make rootfs use tmpfs when CONFIG_TMPFS enabled

Conditionally call the appropriate fs_init function and fill_super
functions.  Add a use once guard to shmem_init() to simply succeed on a
second call.

(Note that IS_ENABLED() is a compile time constant so dead code
elimination removes unused function calls when CONFIG_TMPFS is disabled.)

Signed-off-by: Rob Landley <rob@landley.net>
Cc: Jeff Layton <jlayton@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Stephen Warren <swarren@nvidia.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Jim Cromie <jim.cromie@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
init/do_mounts.c
mm/shmem.c