From mboxrd@z Thu Jan 1 00:00:00 1970 From: Greg KH Subject: Re: [PATCH] serial: 8250: fix a sparse warning Date: Mon, 9 Mar 2015 09:53:16 +0100 Message-ID: <20150309085316.GA9131@kroah.com> References: <1425886615-78601-1-git-send-email-zhenzhang.zhang@huawei.com> <54FD4EE6.7000408@huawei.com> <20150309082253.GA14349@kroah.com> <54FD5C9C.4080609@huawei.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Content-Disposition: inline In-Reply-To: <54FD5C9C.4080609@huawei.com> Sender: linux-kernel-owner@vger.kernel.org To: Zhang Zhen Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, tim.kryger@linaro.org, jamie@jamieiles.com, alan@linux.intel.com, arnd@arndb.de List-Id: linux-serial@vger.kernel.org On Mon, Mar 09, 2015 at 04:41:00PM +0800, Zhang Zhen wrote: > On 2015/3/9 16:22, Greg KH wrote: > > On Mon, Mar 09, 2015 at 03:42:30PM +0800, Zhang Zhen wrote: > >> drivers/tty/serial/8250/8250_core.c: In function =E2=80=98serial82= 50_console_write=E2=80=99: > >> drivers/tty/serial/8250/8250_core.c:3244: warning: =E2=80=98flags=E2= =80=99 may be used u > >> unitialized in this function > >> > >> Signed-off-by: Zhang Zhen > >> --- > >> drivers/tty/serial/8250/8250_core.c | 2 +- > >> 1 file changed, 1 insertion(+), 1 deletion(-) > >> > >> diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/ser= ial/8250/8250_core.c > >> index deae122..50702e2 100644 > >> --- a/drivers/tty/serial/8250/8250_core.c > >> +++ b/drivers/tty/serial/8250/8250_core.c > >> @@ -3241,7 +3241,7 @@ serial8250_console_write(struct console *co,= const char *s, unsigned int count) > >> { > >> struct uart_8250_port *up =3D &serial8250_ports[co->index]; > >> struct uart_port *port =3D &up->port; > >> - unsigned long flags; > >> + unsigned long flags =3D 0; > >> unsigned int ier; > >> int locked =3D 1; > >> > >=20 > > Sparse generated this? Or did a broken / old version of gcc? > >=20 > Sorry, it's a gcc warning. >=20 > My gcc version is: > gcc (SUSE Linux) 4.3.4 [gcc-4_3-branch revision 152973] That's really old and obsolete, please use a modern version of gcc, especially when sending in patches for compiler warnings. greg k-h