From patchwork Fri Sep 21 10:25:24 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: mISDN: suppress compiler warning Date: Fri, 21 Sep 2012 00:25:24 -0000 From: Paul Bolle X-Patchwork-Id: 185677 Message-Id: <1348223124.1581.15.camel@x61.thuisdomein> To: Karsten Keil Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org Building the hfcpci driver triggers this GCC warning: drivers/isdn/hardware/mISDN/hfcpci.c:2298:2: warning: ignoring return value of 'driver_for_each_device', declared with attribute warn_unused_result [-Wunused-result] That return value is apparently ignored because _hfcpci_softirq() will always return 0. Suppress this warning in the way a few other drivers do that too. Signed-off-by: Paul Bolle --- 0) I noticed this warning while building v3.6-rc6 on current Fedora 17, using Fedora's default config. 1) Compile tested only. drivers/isdn/hardware/mISDN/hfcpci.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/isdn/hardware/mISDN/hfcpci.c b/drivers/isdn/hardware/mISDN/hfcpci.c index 81363ff..a547c8c 100644 --- a/drivers/isdn/hardware/mISDN/hfcpci.c +++ b/drivers/isdn/hardware/mISDN/hfcpci.c @@ -2295,8 +2295,11 @@ _hfcpci_softirq(struct device *dev, void *arg) static void hfcpci_softirq(void *arg) { - (void) driver_for_each_device(&hfc_driver.driver, NULL, arg, + int ret; + + ret = driver_for_each_device(&hfc_driver.driver, NULL, arg, _hfcpci_softirq); + (void)ret; /* suppress compiler warning */ /* if next event would be in the past ... */ if ((s32)(hfc_jiffies + tics - jiffies) <= 0)