On Mon, Jan 07, 2019 at 10:58:12PM +0800, Shaokun Zhang wrote: > In file included from ./include/linux/rwsem.h:16:0, > from ./include/linux/notifier.h:15, > from ./include/linux/clk.h:17, > from drivers/tty/serial/sh-sci.c:24: > drivers/tty/serial/sh-sci.c: In function ‘sci_submit_rx’: > ./include/linux/spinlock.h:279:3: warning: ‘flags’ may be used uninitialized in this function [-Wmaybe-uninitialized] > _raw_spin_unlock_irqrestore(lock, flags); \ > ^ > drivers/tty/serial/sh-sci.c:1338:16: note: ‘flags’ was declared here > unsigned long flags; > GCC version is gcc (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.10) 5.4.0 20160609. That is a very old version of gcc, please use a newer one that actually has fixed this bug... thanks, greg k-h
