Hi Gustavo, FYI, the error/warning still remains.
tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux.git master head: ecb095bff5d4b8711a81968625b3b4a235d3e477 commit: a035d552a93bb9ef6048733bb9f2a0dc857ff869 Makefile: Globally enable fall-through warning date: 13 days ago config: arm-ep93xx_defconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 7.4.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout a035d552a93bb9ef6048733bb9f2a0dc857ff869 # save the attached .config to linux build tree GCC_VERSION=7.4.0 make.cross ARCH=arm If you fix the issue, kindly add following tag Reported-by: kbuild test robot <l...@intel.com> All warnings (new ones prefixed by >>): arch/arm/mach-ep93xx/crunch.c: In function 'crunch_do': >> arch/arm/mach-ep93xx/crunch.c:46:3: warning: this statement may fall through >> [-Wimplicit-fallthrough=] memset(crunch_state, 0, sizeof(*crunch_state)); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/arm/mach-ep93xx/crunch.c:53:2: note: here case THREAD_NOTIFY_EXIT: ^~~~ vim +46 arch/arm/mach-ep93xx/crunch.c c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 35 c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 36 static int crunch_do(struct notifier_block *self, unsigned long cmd, void *t) c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 37 { c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 38 struct thread_info *thread = (struct thread_info *)t; c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 39 struct crunch_state *crunch_state; c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 40 u32 devcfg; c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 41 c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 42 crunch_state = &thread->crunchstate; c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 43 c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 44 switch (cmd) { c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 45 case THREAD_NOTIFY_FLUSH: c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 @46 memset(crunch_state, 0, sizeof(*crunch_state)); c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 47 c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 48 /* c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 49 * FALLTHROUGH: Ensure we don't try to overwrite our newly c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 50 * initialised state information on the first fault. c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 51 */ c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 52 797245f5da5430 arch/arm/kernel/crunch.c Russell King 2009-12-18 53 case THREAD_NOTIFY_EXIT: c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 54 crunch_task_release(thread); c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 55 break; c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 56 c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 57 case THREAD_NOTIFY_SWITCH: 02239f0a426460 arch/arm/kernel/crunch.c Hartley Sweeten 2009-07-08 58 devcfg = __raw_readl(EP93XX_SYSCON_DEVCFG); c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 59 if (crunch_enabled(devcfg) || crunch_owner == crunch_state) { 02239f0a426460 arch/arm/kernel/crunch.c Hartley Sweeten 2009-07-08 60 /* 02239f0a426460 arch/arm/kernel/crunch.c Hartley Sweeten 2009-07-08 61 * We don't use ep93xx_syscon_swlocked_write() here 02239f0a426460 arch/arm/kernel/crunch.c Hartley Sweeten 2009-07-08 62 * because we are on the context switch path and 02239f0a426460 arch/arm/kernel/crunch.c Hartley Sweeten 2009-07-08 63 * preemption is already disabled. 02239f0a426460 arch/arm/kernel/crunch.c Hartley Sweeten 2009-07-08 64 */ 02239f0a426460 arch/arm/kernel/crunch.c Hartley Sweeten 2009-07-08 65 devcfg ^= EP93XX_SYSCON_DEVCFG_CPENA; c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 66 __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK); 02239f0a426460 arch/arm/kernel/crunch.c Hartley Sweeten 2009-07-08 67 __raw_writel(devcfg, EP93XX_SYSCON_DEVCFG); c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 68 } c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 69 break; c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 70 } c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 71 c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 72 return NOTIFY_DONE; c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 73 } c17fad11f3105c arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 74 :::::: The code at line 46 was first introduced by commit :::::: c17fad11f3105ca4d5bbb2686725aad208f5ead4 [ARM] 3370/2: ep93xx: add crunch support :::::: TO: Lennert Buytenhek <buyt...@wantstofly.org> :::::: CC: Russell King <rmk+ker...@arm.linux.org.uk> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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