On Thu, Dec 21, 2017 at 12:35:21AM +0800, kbuild test robot wrote: > Thank you for the patch! Perhaps something to improve: > > [auto build test WARNING on linus/master] > [also build test WARNING on v4.15-rc4 next-20171220] > [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/Tomasz-Majchrzak/raid5-ppl-PPL-support-for-disks-with-write-back-cache-enabled/20171220-181528 > reproduce: > # apt-get install sparse > make ARCH=x86_64 allmodconfig > make C=1 CF=-D__CHECK_ENDIAN__ > > > 633 > 634 rcu_read_lock(); > > 635 rdev = rcu_dereference(conf->disks[i].rdev); > 636 if (rdev && test_bit(Faulty, &rdev->flags)) > 637 rdev = NULL; > 638 rcu_read_unlock(); The warning from sparse is: drivers/md/raid5-ppl.c:635:24: error: incompatible types in comparison expression (different address spaces) There is the same warning for 20 other places in md raid5 code, everywhere where rcu_dereference is used so I understand the probles is either in sparse or in function implementation. Tomek -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
