• Linus Torvalds's avatar
    mm/swap: don't BUG_ON() due to uninitialized swap slot cache · 452b94b8
    Linus Torvalds authored
    This BUG_ON() triggered for me once at shutdown, and I don't see a
    reason for the check.  The code correctly checks whether the swap slot
    cache is usable or not, so an uninitialized swap slot cache is not
    actually problematic afaik.
    I've temporarily just switched the BUG_ON() to a WARN_ON_ONCE(), since
    I'm not sure why that seemingly pointless check was there.  I suspect
    the real fix is to just remove it entirely, but for now we'll warn about
    it but not bring the machine down.
    Cc: "Huang, Ying" <ying.huang@intel.com>
    Cc: Tim Chen <tim.c.chen@linux.intel.com>
    Cc: Michal Hocko <mhocko@suse.com>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>