On Mon, Jul 17, 2023 at 12:55:42AM +0530, Naresh Kamboju wrote: > Linux stable-rc 6.1 build failed x86 and i386 with clang. > > Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx> > > Build log: > ----------- > block/blk-cgroup.c:1237:6: error: variable 'ret' is used uninitialized > whenever 'if' condition is true [-Werror,-Wsometimes-uninitialized] > if (init_blkcg_llists(blkcg)) > ^~~~~~~~~~~~~~~~~~~~~~~~ > block/blk-cgroup.c:1287:9: note: uninitialized use occurs here > return ret; > ^~~ > block/blk-cgroup.c:1237:2: note: remove the 'if' if its condition is > always false > if (init_blkcg_llists(blkcg)) > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > block/blk-cgroup.c:1222:33: note: initialize the variable 'ret' to > silence this warning > struct cgroup_subsys_state *ret; > ^ > = NULL > 1 error generated. > > Links, > - https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.1.y-sanity/build/v6.1.38-599-g5071846d06ef/testrun/18327562/suite/build/test/clang-lkftconfig/history/ > - https://storage.tuxsuite.com/public/linaro/lkft/builds/2SfFoWj9NmKWHRijR0hcoXGjLhr/ > > tuxmake \ > --runtime podman --target-arch x86_64 \ > --toolchain clang-16 \ > --kconfig https://storage.tuxsuite.com/public/linaro/lkft/builds/2SfFoWj9NmKWHRijR0hcoXGjLhr/config > \ > LLVM=1 LLVM_IAS=1 > It looks like 6.1 needs commit b5a9adcbd5dc ("blk-cgroup: Return -ENOMEM directly in blkcg_css_alloc() error path") if it wants to take commit 3b8cc6298724 ("blk-cgroup: Optimize blkcg_rstat_flush()"). Cheers, Nathan
