On Wed, Jun 11, 2014 at 07:06:32AM -0400, Jeff Layton wrote: > $ rpm -q sparse > sparse-0.5.0-1.fc20.x86_64 > > I see it all over the tree, but an easy example is fs/locks.c: > > $ make fs/locks.o C=1 > make[1]: Nothing to be done for `all'. > make[1]: Nothing to be done for `relocs'. > CHK include/config/kernel.release > CHK include/generated/uapi/linux/version.h > CHK include/generated/utsrelease.h > CALL scripts/checksyscalls.sh > CHECK fs/locks.c > include/linux/err.h:35:16: warning: dereference of noderef expression > include/linux/err.h:30:23: warning: dereference of noderef expression > include/linux/err.h:35:16: warning: dereference of noderef expression > include/linux/err.h:30:23: warning: dereference of noderef expression > CC fs/locks.o > > It has two IS_ERR calls and two PTR_ERR calls, and each generates the > warning. > I downloaded the Fedora SRPM and built the binary but I still wasn't able to reproduce the bug. dcarpenter@speke:~/progs/kernel/devel$ /tmp/sparse/sparse-0.5.0/sparse --version 0.5.0 dcarpenter@speke:~/progs/kernel/devel$ make C=2 CHECK=/tmp/sparse/sparse-0.5.0/sparse fs/locks.o CHK include/config/kernel.release CHK include/generated/uapi/linux/version.h CHK include/generated/utsrelease.h CALL scripts/checksyscalls.sh <stdin>:1226:2: warning: #warning syscall finit_module not implemented [-Wcpp] <stdin>:1229:2: warning: #warning syscall sched_setattr not implemented [-Wcpp] <stdin>:1232:2: warning: #warning syscall sched_getattr not implemented [-Wcpp] <stdin>:1235:2: warning: #warning syscall renameat2 not implemented [-Wcpp] CHECK scripts/mod/empty.c CHECK fs/locks.c dcarpenter@speke:~/progs/kernel/devel$ I'm on today's linux-next. I can't think of a kernel configuration issue which would cause this... regards, dan carpenter -- To unsubscribe from this list: send the line "unsubscribe linux-sparse" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
