sys_swapon: call swap_cgroup_swapon() earlier
The call to swap_cgroup_swapon is in the middle of loading the swap map and extents. As it only does memory allocation and does not depend on the swapfile layout (map/extents), it can be called earlier (or later). Move it to just after the allocation of swap_map, since it is conceptually similar (allocates a map). Signed-off-by: NCesar Eduardo Barros <cesarb@cesarb.net> Tested-by: NEric B Munson <emunson@mgebm.net> Acked-by: NEric B Munson <emunson@mgebm.net> Reviewed-by: NPekka Enberg <penberg@kernel.org> Reviewed-by: NKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Hugh Dickins <hughd@google.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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