From mboxrd@z Thu Jan 1 00:00:00 1970 From: fengguang.wu@intel.com (kbuild test robot) Date: Sat, 15 Oct 2016 02:19:14 +0800 Subject: [arm-soc:to-build 18/18] drivers/spi/spi-fsl-espi.c:462:4: warning: 'rx_data' may be used uninitialized in this function Message-ID: <201610150256.aVfqdtgA%fengguang.wu@intel.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org tree: https://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc.git to-build head: 9f700f316330ee9341e1e817468bd272a4535291 commit: 9f700f316330ee9341e1e817468bd272a4535291 [18/18] Revert "Disable "maybe-uninitialized" warning globally" config: powerpc-kmp204x_defconfig (attached as .config) compiler: powerpc-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705 reproduce: wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 9f700f316330ee9341e1e817468bd272a4535291 # save the attached .config to linux build tree make.cross ARCH=powerpc 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/spi/spi-fsl-espi.c: In function 'fsl_espi_irq': >> drivers/spi/spi-fsl-espi.c:462:4: warning: 'rx_data' may be used uninitialized in this function [-Wmaybe-uninitialized] mspi->get_rx(rx_data, mspi); ^~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/spi/spi-fsl-espi.c:421:7: note: 'rx_data' was declared here u32 rx_data, tmp; ^~~~~~~ vim +/rx_data +462 drivers/spi/spi-fsl-espi.c e6289d63 drivers/spi/spi_fsl_espi.c Mingkai Hu 2010-12-21 446 } else { 6319a680 drivers/spi/spi-fsl-espi.c Nobuteru Hayashi 2016-03-18 447 rx_nr_bytes = mspi->len; e6289d63 drivers/spi/spi_fsl_espi.c Mingkai Hu 2010-12-21 448 tmp = mspi->len; e6289d63 drivers/spi/spi_fsl_espi.c Mingkai Hu 2010-12-21 449 rx_data = 0; e6289d63 drivers/spi/spi_fsl_espi.c Mingkai Hu 2010-12-21 450 while (tmp--) { 46afd38b drivers/spi/spi-fsl-espi.c Heiner Kallweit 2016-09-13 451 rx_data_8 = fsl_espi_read_reg8(mspi, 46afd38b drivers/spi/spi-fsl-espi.c Heiner Kallweit 2016-09-13 452 ESPI_SPIRF); e6289d63 drivers/spi/spi_fsl_espi.c Mingkai Hu 2010-12-21 453 rx_data |= (rx_data_8 << (tmp * 8)); e6289d63 drivers/spi/spi_fsl_espi.c Mingkai Hu 2010-12-21 454 } e6289d63 drivers/spi/spi_fsl_espi.c Mingkai Hu 2010-12-21 455 e6289d63 drivers/spi/spi_fsl_espi.c Mingkai Hu 2010-12-21 456 rx_data <<= (4 - mspi->len) * 8; e6289d63 drivers/spi/spi_fsl_espi.c Mingkai Hu 2010-12-21 457 } e6289d63 drivers/spi/spi_fsl_espi.c Mingkai Hu 2010-12-21 458 6319a680 drivers/spi/spi-fsl-espi.c Nobuteru Hayashi 2016-03-18 459 mspi->len -= rx_nr_bytes; 8b60d6c2 drivers/spi/spi_fsl_espi.c Mingkai Hu 2010-10-12 460 8b60d6c2 drivers/spi/spi_fsl_espi.c Mingkai Hu 2010-10-12 461 if (mspi->rx) 8b60d6c2 drivers/spi/spi_fsl_espi.c Mingkai Hu 2010-10-12 @462 mspi->get_rx(rx_data, mspi); 8b60d6c2 drivers/spi/spi_fsl_espi.c Mingkai Hu 2010-10-12 463 } 8b60d6c2 drivers/spi/spi_fsl_espi.c Mingkai Hu 2010-10-12 464 81abc2ec drivers/spi/spi-fsl-espi.c Heiner Kallweit 2016-09-13 465 if (!(events & SPIE_TNF)) { 8b60d6c2 drivers/spi/spi_fsl_espi.c Mingkai Hu 2010-10-12 466 int ret; 8b60d6c2 drivers/spi/spi_fsl_espi.c Mingkai Hu 2010-10-12 467 8b60d6c2 drivers/spi/spi_fsl_espi.c Mingkai Hu 2010-10-12 468 /* spin until TX is done */ 46afd38b drivers/spi/spi-fsl-espi.c Heiner Kallweit 2016-09-13 469 ret = spin_event_timeout(((events = fsl_espi_read_reg( 81abc2ec drivers/spi/spi-fsl-espi.c Heiner Kallweit 2016-09-13 470 mspi, ESPI_SPIE)) & SPIE_TNF), 1000, 0); :::::: The code at line 462 was first introduced by commit :::::: 8b60d6c25b2a2d3525d5322de856c3ca408e5783 spi/fsl_spi: add eSPI controller support :::::: TO: Mingkai Hu :::::: CC: Grant Likely --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation -------------- next part -------------- A non-text attachment was scrubbed... Name: .config.gz Type: application/gzip Size: 16547 bytes Desc: not available URL: