On Sat, Oct 25, 2014 at 05:26:31PM +0800, Weijie Yang wrote: > There is a rare NULL pointer bug in mem_used_total_show() in concurrent > situation, like this: > zram is not initialized, process A is a mem_used_total reader which runs > periodicity, while process B try to init zram. > > process A process B > access meta, get a NULL value > init zram, done > init_done() is true > access meta->mem_pool, get a NULL pointer BUG > > This patch fixes this issue. > > Signed-off-by: Weijie Yang <weijie.yang@xxxxxxxxxxx> Acked-by: Minchan Kim <minchan@xxxxxxxxxx> Thanks! -- Kind regards, Minchan Kim -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>