From: Kurt Kanzenbach Date: Mon, 24 Sep 2018 10:29:01 +0200 Subject: [PATCH 166/342] tty: serial: pl011: explicitly initialize the flags variable MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Origin: https://git.kernel.org/cgit/linux/kernel/git/rt/linux-stable-rt.git/commit?id=2a2684c06eb6b87c6cd8a915f01cd285ae4acec1 Silence the following gcc warning: drivers/tty/serial/amba-pl011.c: In function ‘pl011_console_write’: ./include/linux/spinlock.h:260:3: warning: ‘flags’ may be used uninitialized in this function [-Wmaybe-uninitialized] _raw_spin_unlock_irqrestore(lock, flags); \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/tty/serial/amba-pl011.c:2214:16: note: ‘flags’ was declared here unsigned long flags; ^~~~~ The code is correct. Thus, initializing flags to zero doesn't change the behavior and resolves the warning. Signed-off-by: Kurt Kanzenbach Signed-off-by: Sebastian Andrzej Siewior --- drivers/tty/serial/amba-pl011.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index c93f742f1d9d..925c3556ffb9 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -2210,7 +2210,7 @@ pl011_console_write(struct console *co, const char *s, unsigned int count) { struct uart_amba_port *uap = amba_ports[co->index]; unsigned int old_cr = 0, new_cr; - unsigned long flags; + unsigned long flags = 0; int locked = 1; clk_enable(uap->clk);