Re: [PATCH 2/2] hvc_xen: fix xenboot for DomUs

From: kbuild test robot
Date: Wed Feb 24 2016 - 07:57:39 EST


Hi Stefano,

[auto build test WARNING on tty/tty-testing]
[also build test WARNING on v4.5-rc5 next-20160223]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url: https://github.com/0day-ci/linux/commits/Stefano-Stabellini/hvc_xen-add-earlycon-support/20160224-203006
base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing
config: x86_64-randconfig-x009-201608 (attached as .config)
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64

All warnings (new ones prefixed by >>):

drivers/tty/hvc/hvc_xen.c: In function 'xenboot_setup_console':
>> drivers/tty/hvc/hvc_xen.c:637:1: warning: control reaches end of non-void function [-Wreturn-type]
}
^

vim +637 drivers/tty/hvc/hvc_xen.c

621 }
622 if (off < len)
623 domU_write_console(0, string+off, len-off);
624 }
625
626 #ifdef CONFIG_EARLY_PRINTK
627 static int xenboot_setup_console(struct console *console, char *string)
628 {
629 static struct xencons_info xenboot;
630
631 if (xen_initial_domain())
632 return 0;
633 if (!xen_pv_domain())
634 return -ENODEV;
635
636 xen_early_pv_console_init(&xenboot, 0);
> 637 }
638
639 static void xenboot_write_console(struct console *console, const char *string,
640 unsigned len)
641 {
642 if (!xen_pv_domain())
643 return;
644
645 dom0_write_console(0, string, len);

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