Hi Arend, [auto build test WARNING on mac80211-next/master] [cannot apply to v4.11-rc5 next-20170407] [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/Arend-van-Spriel/cfg80211-support-multiple-scheduled-scans/20170408-175235 base: https://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next.git master config: m68k-allmodconfig (attached as .config) compiler: m68k-linux-gcc (GCC) 4.9.0 reproduce: wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=m68k 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/net/wireless/broadcom/brcm80211/brcmfmac/pno.c: In function 'brcmf_pno_config_sched_scans': drivers/net/wireless/broadcom/brcm80211/brcmfmac/pno.c:158:6: warning: 'mac_mask' may be used uninitialized in this function [-Wmaybe-uninitialized] u8 *mac_mask; ^ In file included from include/linux/string.h:18:0, from include/linux/bitmap.h:8, from include/linux/cpumask.h:11, from include/linux/smp.h:12, from include/linux/percpu.h:6, from include/linux/netdevice.h:36, from drivers/net/wireless/broadcom/brcm80211/brcmfmac/pno.c:16: >> arch/m68k/include/asm/string.h:71:25: warning: 'mac_addr' may be used uninitialized in this function [-Wmaybe-uninitialized] #define memcpy(d, s, n) __builtin_memcpy(d, s, n) ^ drivers/net/wireless/broadcom/brcm80211/brcmfmac/pno.c:157:6: note: 'mac_addr' was declared here u8 *mac_addr; ^ In file included from include/uapi/linux/swab.h:6:0, from include/linux/swab.h:4, from include/uapi/linux/byteorder/big_endian.h:12, from include/linux/byteorder/big_endian.h:4, from arch/m68k/include/uapi/asm/byteorder.h:4, from include/asm-generic/bitops/le.h:5, from arch/m68k/include/asm/bitops.h:518, from include/linux/bitops.h:36, from include/linux/kernel.h:10, from include/linux/list.h:8, from include/linux/timer.h:4, from include/linux/netdevice.h:28, from drivers/net/wireless/broadcom/brcm80211/brcmfmac/pno.c:16: >> arch/m68k/include/uapi/asm/swab.h:21:2: warning: 'scan_freq' may be used uninitialized in this function [-Wmaybe-uninitialized] __asm__("rolw #8,%0; swap %0; rolw #8,%0" : "=d" (val) : "0" (val)); ^ drivers/net/wireless/broadcom/brcm80211/brcmfmac/pno.c:371:6: note: 'scan_freq' was declared here u32 scan_freq; ^ drivers/net/wireless/broadcom/brcm80211/brcmfmac/pno.c:435:2: warning: 'buckets' may be used uninitialized in this function [-Wmaybe-uninitialized] kfree(buckets); ^ -- drivers/net/wireless//broadcom/brcm80211/brcmfmac/pno.c: In function 'brcmf_pno_config_sched_scans': drivers/net/wireless//broadcom/brcm80211/brcmfmac/pno.c:158:6: warning: 'mac_mask' may be used uninitialized in this function [-Wmaybe-uninitialized] u8 *mac_mask; ^ In file included from include/linux/string.h:18:0, from include/linux/bitmap.h:8, from include/linux/cpumask.h:11, from include/linux/smp.h:12, from include/linux/percpu.h:6, from include/linux/netdevice.h:36, from drivers/net/wireless//broadcom/brcm80211/brcmfmac/pno.c:16: >> arch/m68k/include/asm/string.h:71:25: warning: 'mac_addr' may be used uninitialized in this function [-Wmaybe-uninitialized] #define memcpy(d, s, n) __builtin_memcpy(d, s, n) ^ drivers/net/wireless//broadcom/brcm80211/brcmfmac/pno.c:157:6: note: 'mac_addr' was declared here u8 *mac_addr; ^ In file included from include/uapi/linux/swab.h:6:0, from include/linux/swab.h:4, from include/uapi/linux/byteorder/big_endian.h:12, from include/linux/byteorder/big_endian.h:4, from arch/m68k/include/uapi/asm/byteorder.h:4, from include/asm-generic/bitops/le.h:5, from arch/m68k/include/asm/bitops.h:518, from include/linux/bitops.h:36, from include/linux/kernel.h:10, from include/linux/list.h:8, from include/linux/timer.h:4, from include/linux/netdevice.h:28, from drivers/net/wireless//broadcom/brcm80211/brcmfmac/pno.c:16: >> arch/m68k/include/uapi/asm/swab.h:21:2: warning: 'scan_freq' may be used uninitialized in this function [-Wmaybe-uninitialized] __asm__("rolw #8,%0; swap %0; rolw #8,%0" : "=d" (val) : "0" (val)); ^ drivers/net/wireless//broadcom/brcm80211/brcmfmac/pno.c:371:6: note: 'scan_freq' was declared here u32 scan_freq; ^ drivers/net/wireless//broadcom/brcm80211/brcmfmac/pno.c:435:2: warning: 'buckets' may be used uninitialized in this function [-Wmaybe-uninitialized] kfree(buckets); ^ vim +/mac_addr +71 arch/m68k/include/asm/string.h ea61bc46 Greg Ungerer 2010-09-07 55 : "+a" (cs), "+a" (ct), "=d" (res)); ea61bc46 Greg Ungerer 2010-09-07 56 return res; ea61bc46 Greg Ungerer 2010-09-07 57 } 982cd252 Greg Ungerer 2011-02-03 58 #endif /* CONFIG_COLDFIRE */ ea61bc46 Greg Ungerer 2010-09-07 59 ea61bc46 Greg Ungerer 2010-09-07 60 #define __HAVE_ARCH_MEMMOVE ea61bc46 Greg Ungerer 2010-09-07 61 extern void *memmove(void *, const void *, __kernel_size_t); ea61bc46 Greg Ungerer 2010-09-07 62 ea61bc46 Greg Ungerer 2010-09-07 63 #define memcmp(d, s, n) __builtin_memcmp(d, s, n) ea61bc46 Greg Ungerer 2010-09-07 64 ea61bc46 Greg Ungerer 2010-09-07 65 #define __HAVE_ARCH_MEMSET ea61bc46 Greg Ungerer 2010-09-07 66 extern void *memset(void *, int, __kernel_size_t); ea61bc46 Greg Ungerer 2010-09-07 67 #define memset(d, c, n) __builtin_memset(d, c, n) ea61bc46 Greg Ungerer 2010-09-07 68 ea61bc46 Greg Ungerer 2010-09-07 69 #define __HAVE_ARCH_MEMCPY ea61bc46 Greg Ungerer 2010-09-07 70 extern void *memcpy(void *, const void *, __kernel_size_t); ea61bc46 Greg Ungerer 2010-09-07 @71 #define memcpy(d, s, n) __builtin_memcpy(d, s, n) ea61bc46 Greg Ungerer 2010-09-07 72 ea61bc46 Greg Ungerer 2010-09-07 73 #endif /* _M68K_STRING_H_ */ :::::: The code at line 71 was first introduced by commit :::::: ea61bc461d09e8d331a307916530aaae808c72a2 m68k/m68knommu: merge MMU and non-MMU string.h :::::: TO: Greg Ungerer <gerg@xxxxxxxxxxxx> :::::: CC: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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