Hi Zhu, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on v4.16-rc5 next-20180316] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Zhu-Yanjun/IB-rxe-optimize-the-recv-process/20180318-130259 config: i386-randconfig-x072-201811 (attached as .config) compiler: gcc-7 (Debian 7.3.0-1) 7.3.0 reproduce: # save the attached .config to linux build tree make ARCH=i386 Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): drivers/infiniband/sw/rxe/rxe_verbs.c: In function 'rxe_query_port': >> drivers/infiniband/sw/rxe/rxe_verbs.c:77:9: warning: 'rc' may be used uninitialized in this function [-Wmaybe-uninitialized] return rc; ^~ vim +/rc +77 drivers/infiniband/sw/rxe/rxe_verbs.c 8700e3e7c Moni Shoua 2016-06-16 53 8700e3e7c Moni Shoua 2016-06-16 54 static int rxe_query_port(struct ib_device *dev, 8700e3e7c Moni Shoua 2016-06-16 55 u8 port_num, struct ib_port_attr *attr) 8700e3e7c Moni Shoua 2016-06-16 56 { 8700e3e7c Moni Shoua 2016-06-16 57 struct rxe_dev *rxe = to_rdev(dev); 8700e3e7c Moni Shoua 2016-06-16 58 struct rxe_port *port; 6c58dc395 Zhu Yanjun 2018-03-17 59 int rc; 8700e3e7c Moni Shoua 2016-06-16 60 8700e3e7c Moni Shoua 2016-06-16 61 if (unlikely(port_num != 1)) { 8700e3e7c Moni Shoua 2016-06-16 62 pr_warn("invalid port_number %d\n", port_num); d41861942 Yuval Shaia 2017-06-14 63 goto out; 8700e3e7c Moni Shoua 2016-06-16 64 } 8700e3e7c Moni Shoua 2016-06-16 65 8700e3e7c Moni Shoua 2016-06-16 66 port = &rxe->port; 8700e3e7c Moni Shoua 2016-06-16 67 c4550c63b Or Gerlitz 2017-01-24 68 /* *attr being zeroed by the caller, avoid zeroing it here */ 8700e3e7c Moni Shoua 2016-06-16 69 *attr = port->attr; 8700e3e7c Moni Shoua 2016-06-16 70 8700e3e7c Moni Shoua 2016-06-16 71 mutex_lock(&rxe->usdev_lock); d41861942 Yuval Shaia 2017-06-14 72 rc = ib_get_eth_speed(dev, port_num, &attr->active_speed, e404f945a Parav Pandit 2016-09-28 73 &attr->active_width); 8700e3e7c Moni Shoua 2016-06-16 74 mutex_unlock(&rxe->usdev_lock); 8700e3e7c Moni Shoua 2016-06-16 75 d41861942 Yuval Shaia 2017-06-14 76 out: d41861942 Yuval Shaia 2017-06-14 @77 return rc; 8700e3e7c Moni Shoua 2016-06-16 78 } 8700e3e7c Moni Shoua 2016-06-16 79 :::::: The code at line 77 was first introduced by commit :::::: d41861942fc55c14b6280d9568a0d0112037f065 IB/core: Add generic function to extract IB speed from netdev :::::: TO: Yuval Shaia <yuval.shaia@xxxxxxxxxx> :::::: CC: Doug Ledford <dledford@xxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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