On Tue, 2013-07-09 at 17:38 +0800, kbuild test robot wrote: > tree: git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi.git misc > head: 06ba9fa7f8cec5b9c04e511bfe21c5aa7cc3044c > commit: eb7b211bac8e0aad45c2349a853be13cef20048a [34/37] [SCSI] scsi_debug: reduce duplication between prot_verify_read and prot_verify_write > config: x86_64-randconfig-x027-0707 (attached as .config) > > 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: > > In file included from include/linux/swab.h:4:0, > from include/uapi/linux/byteorder/little_endian.h:12, > from include/linux/byteorder/little_endian.h:4, > from arch/x86/include/uapi/asm/byteorder.h:4, > from include/asm-generic/bitops/le.h:5, > from arch/x86/include/asm/bitops.h:516, > from include/linux/bitops.h:22, > from include/linux/kernel.h:10, > from include/linux/cache.h:4, > from include/linux/time.h:4, > from include/linux/stat.h:18, > from include/linux/module.h:10, > from drivers/scsi/scsi_debug.c:28: > drivers/scsi/scsi_debug.c: In function 'dif_verify': > >> include/uapi/linux/swab.h:106:23: warning: 'csum' may be used uninitialized in this function [-Wmaybe-uninitialized] > (__builtin_constant_p((__u16)(x)) ? \ > ^ > drivers/scsi/scsi_debug.c:1715:6: note: 'csum' was declared here > u16 csum; > ^ This is probably because the randconfig has CONFIG_BUG=n, so the default case is a nop. The original had an initialiser in there, so the fix is either to drop the impossible default case or add the initialiser. James -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
