sysfs: rename sysfs_dirent->s_type to s_flags and make room for flags

Rename sysfs_dirent->s_type to s_flags, pack type into lower eight
bits and reserve the rest for flags.  sysfs_type() can used to access
the type.  All existing sd->s_type accesses are converted to use
sysfs_type().  While at it, type test is changed to equality test
instead of bit-and test where appropriate.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c
index 4be9593..078537e 100644
--- a/fs/sysfs/mount.c
+++ b/fs/sysfs/mount.c
@@ -26,7 +26,7 @@
 
 static struct sysfs_dirent sysfs_root = {
 	.s_count	= ATOMIC_INIT(1),
-	.s_type		= SYSFS_ROOT,
+	.s_flags	= SYSFS_ROOT,
 	.s_mode		= S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO,
 	.s_ino		= 1,
 };