Hi Arnd, First bad commit (maybe != root cause): tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing head: 92770c07234fb9e097ceb512e4bb29aca750075c commit: 5dce8eccb54355ea42918b651f1085e54b2c5f2f [84/90] serial: lpc32xx_hs: allow compile-testing reproduce: # apt-get install sparse # sparse version: v0.6.1-rc1-7-g2b96cd8-dirty git checkout 5dce8eccb54355ea42918b651f1085e54b2c5f2f make ARCH=x86_64 allmodconfig make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) include/linux/sched.h:609:43: sparse: sparse: bad integer constant expression include/linux/sched.h:609:73: sparse: sparse: invalid named zero-width bitfield `value' include/linux/sched.h:610:43: sparse: sparse: bad integer constant expression include/linux/sched.h:610:67: sparse: sparse: invalid named zero-width bitfield `bucket_id' drivers/tty/serial/lpc32xx_hs.c:447:14: sparse: sparse: undefined identifier 'LPC32XX_HS_UART1_BASE' drivers/tty/serial/lpc32xx_hs.c:450:14: sparse: sparse: undefined identifier 'LPC32XX_HS_UART2_BASE' drivers/tty/serial/lpc32xx_hs.c:453:14: sparse: sparse: undefined identifier 'LPC32XX_HS_UART7_BASE' >> drivers/tty/serial/lpc32xx_hs.c:447:14: sparse: sparse: incompatible types for 'case' statement drivers/tty/serial/lpc32xx_hs.c:450:14: sparse: sparse: incompatible types for 'case' statement drivers/tty/serial/lpc32xx_hs.c:453:14: sparse: sparse: incompatible types for 'case' statement drivers/tty/serial/lpc32xx_hs.c:461:21: sparse: sparse: undefined identifier 'LPC32XX_UARTCTL_CLOOP' drivers/tty/serial/lpc32xx_hs.c:466:21: sparse: sparse: undefined identifier 'LPC32XX_UARTCTL_CLOOP' drivers/tty/serial/lpc32xx_hs.c:580:17: sparse: sparse: undefined identifier 'SZ_4K' drivers/tty/serial/lpc32xx_hs.c:591:22: sparse: sparse: undefined identifier 'SZ_4K' drivers/tty/serial/lpc32xx_hs.c:594:64: sparse: sparse: undefined identifier 'SZ_4K' drivers/tty/serial/lpc32xx_hs.c:596:33: sparse: sparse: undefined identifier 'SZ_4K' drivers/tty/serial/lpc32xx_hs.c:693:27: sparse: sparse: undefined identifier 'LPC32XX_MAIN_OSC_FREQ' drivers/tty/serial/lpc32xx_hs.c:447:14: sparse: sparse: Expected constant expression in case statement drivers/tty/serial/lpc32xx_hs.c:450:14: sparse: sparse: Expected constant expression in case statement drivers/tty/serial/lpc32xx_hs.c:453:14: sparse: sparse: Expected constant expression in case statement vim +/case +447 drivers/tty/serial/lpc32xx_hs.c 596f93f50e2d1a Roland Stigge 2012-06-11 439 596f93f50e2d1a Roland Stigge 2012-06-11 440 /* LPC3250 Errata HSUART.1: Hang workaround via loopback mode on inactivity */ 596f93f50e2d1a Roland Stigge 2012-06-11 441 static void lpc32xx_loopback_set(resource_size_t mapbase, int state) 596f93f50e2d1a Roland Stigge 2012-06-11 442 { 596f93f50e2d1a Roland Stigge 2012-06-11 443 int bit; 596f93f50e2d1a Roland Stigge 2012-06-11 444 u32 tmp; 596f93f50e2d1a Roland Stigge 2012-06-11 445 596f93f50e2d1a Roland Stigge 2012-06-11 446 switch (mapbase) { 596f93f50e2d1a Roland Stigge 2012-06-11 @447 case LPC32XX_HS_UART1_BASE: 596f93f50e2d1a Roland Stigge 2012-06-11 448 bit = 0; 596f93f50e2d1a Roland Stigge 2012-06-11 449 break; 596f93f50e2d1a Roland Stigge 2012-06-11 450 case LPC32XX_HS_UART2_BASE: 596f93f50e2d1a Roland Stigge 2012-06-11 451 bit = 1; 596f93f50e2d1a Roland Stigge 2012-06-11 452 break; 596f93f50e2d1a Roland Stigge 2012-06-11 453 case LPC32XX_HS_UART7_BASE: 596f93f50e2d1a Roland Stigge 2012-06-11 454 bit = 6; 596f93f50e2d1a Roland Stigge 2012-06-11 455 break; 596f93f50e2d1a Roland Stigge 2012-06-11 456 default: 596f93f50e2d1a Roland Stigge 2012-06-11 457 WARN(1, "lpc32xx_hs: Warning: Unknown port at %08x\n", mapbase); 596f93f50e2d1a Roland Stigge 2012-06-11 458 return; 596f93f50e2d1a Roland Stigge 2012-06-11 459 } 596f93f50e2d1a Roland Stigge 2012-06-11 460 596f93f50e2d1a Roland Stigge 2012-06-11 461 tmp = readl(LPC32XX_UARTCTL_CLOOP); 596f93f50e2d1a Roland Stigge 2012-06-11 462 if (state) 596f93f50e2d1a Roland Stigge 2012-06-11 463 tmp |= (1 << bit); 596f93f50e2d1a Roland Stigge 2012-06-11 464 else 596f93f50e2d1a Roland Stigge 2012-06-11 465 tmp &= ~(1 << bit); 596f93f50e2d1a Roland Stigge 2012-06-11 466 writel(tmp, LPC32XX_UARTCTL_CLOOP); 596f93f50e2d1a Roland Stigge 2012-06-11 467 } 596f93f50e2d1a Roland Stigge 2012-06-11 468 :::::: The code at line 447 was first introduced by commit :::::: 596f93f50e2d1a926bbb6c73aa7ee7fd862b7062 serial: Add driver for LPC32xx High Speed UARTs :::::: TO: Roland Stigge <stigge@xxxxxxxxx> :::::: CC: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
