From bd2fe272a8ec3841189e07a9a8e9879fe26a3cdc Mon Sep 17 00:00:00 2001 From: Paul Gortmaker Date: Wed, 19 Feb 2014 15:00:13 -0500 Subject: [PATCH] drivers/tty/serial: deal with 8250_core.c uninitialized warning for good Every couple of months, someone sends a patch to fix: drivers/tty/serial/8250/8250_core.c: In function 'serial_unlink_irq_chain': drivers/tty/serial/8250/8250_core.c:1712:2: warning: 'i' may be used uninitialized in this function [-Wuninitialized] and they in turn get a NACK for their efforts, and are told that their compiler is broken. This has been going on since at least the year 2008: https://lkml.org/lkml/2008/11/24/433 Lets add a comment, so that subsequent patches don't get as far as the maintainers or the mailing lists. Acked-by: Alan Cox Signed-off-by: Paul Gortmaker Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_core.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c index 69932b7556cf..747073b8c38a 100644 --- a/drivers/tty/serial/8250/8250_core.c +++ b/drivers/tty/serial/8250/8250_core.c @@ -1694,6 +1694,10 @@ static int serial_link_irq_chain(struct uart_8250_port *up) static void serial_unlink_irq_chain(struct uart_8250_port *up) { + /* + * yes, some broken gcc emit "warning: 'i' may be used uninitialized" + * but no, we are not going to take a patch that assigns NULL below. + */ struct irq_info *i; struct hlist_node *n; struct hlist_head *h; -- 2.20.1