On Wed, 11 Jun 2014 16:11:46 +0300 Dan Carpenter <dan.carpenter@xxxxxxxxxx> wrote: > 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 Could it be arch-specific then? What arch are you using? I'm on x86_64. I know that quite a few other people have mentioned seeing these warnings as well, so I'm pretty sure it's not just me. -- Jeff Layton <jlayton@xxxxxxxxxxxxxxx> -- 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
