tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux.git master head: 0eb0ce0a78e1f57082bca6cbdea6fd04feedb876 commit: a035d552a93bb9ef6048733bb9f2a0dc857ff869 Makefile: Globally enable fall-through warning date: 11 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
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 35
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 36
static int crunch_do(struct notifier_block *self, unsigned long cmd, void *t)
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 37
{
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 38
struct thread_info *thread = (struct thread_info *)t;
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 39
struct crunch_state *crunch_state;
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 40
u32 devcfg;
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 41
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 42
crunch_state = &thread->crunchstate;
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 43
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 44
switch (cmd) {
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 45
case THREAD_NOTIFY_FLUSH:
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 @46
memset(crunch_state, 0, sizeof(*crunch_state));
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 47
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 48
/*
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 49
* FALLTHROUGH: Ensure we don't try to overwrite our newly
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 50
* initialised state information on the first fault.
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 51
*/
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 52
797245f5da54307 arch/arm/kernel/crunch.c Russell King 2009-12-18 53
case THREAD_NOTIFY_EXIT:
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 54
crunch_task_release(thread);
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 55
break;
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 56
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 57
case THREAD_NOTIFY_SWITCH:
02239f0a4264608 arch/arm/kernel/crunch.c Hartley Sweeten 2009-07-08 58
devcfg = __raw_readl(EP93XX_SYSCON_DEVCFG);
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 59
if (crunch_enabled(devcfg) || crunch_owner == crunch_state) {
02239f0a4264608 arch/arm/kernel/crunch.c Hartley Sweeten 2009-07-08 60
/*
02239f0a4264608 arch/arm/kernel/crunch.c Hartley Sweeten 2009-07-08 61
* We don't use ep93xx_syscon_swlocked_write() here
02239f0a4264608 arch/arm/kernel/crunch.c Hartley Sweeten 2009-07-08 62
* because we are on the context switch path and
02239f0a4264608 arch/arm/kernel/crunch.c Hartley Sweeten 2009-07-08 63
* preemption is already disabled.
02239f0a4264608 arch/arm/kernel/crunch.c Hartley Sweeten 2009-07-08 64
*/
02239f0a4264608 arch/arm/kernel/crunch.c Hartley Sweeten 2009-07-08 65
devcfg ^= EP93XX_SYSCON_DEVCFG_CPENA;
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 66
__raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
02239f0a4264608 arch/arm/kernel/crunch.c Hartley Sweeten 2009-07-08 67
__raw_writel(devcfg, EP93XX_SYSCON_DEVCFG);
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 68
}
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 69
break;
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 70
}
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 71
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 72
return NOTIFY_DONE;
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 73
}
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 74
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 75
static struct notifier_block crunch_notifier_block = {
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 76
.notifier_call = crunch_do,
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 77
};
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 78
c914283f5e5f55d arch/arm/mach-ep93xx/crunch.c Shawn Guo 2012-04-26 79
int __init crunch_init(void)
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 80
{
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 81
thread_register_notifier(&crunch_notifier_block);
fac105d05e4b410 arch/arm/kernel/crunch.c Lennert Buytenhek 2007-02-05 82
elf_hwcap |= HWCAP_CRUNCH;
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 83
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 84
return 0;
c17fad11f3105ca arch/arm/kernel/crunch.c Lennert Buytenhek 2006-06-27 85
}
:::::: 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
.config.gz
Description: application/gzip
