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SubjectRe: [PATCH bpf-next v1 1/5] cgroup: bpf: add a hook for bpf progs to attach to rstat flushing
Hi Yosry,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on bpf-next/master]

base: master
config: um-i386_defconfig (
compiler: gcc-11 (Debian 11.3.0-1) 11.3.0
reproduce (this is a W=1 build):
git remote add linux-review
git fetch --no-tags linux-review Yosry-Ahmed/bpf-rstat-cgroup-hierarchical-stats/20220520-093041
git checkout 23c4c48fb35b084dc1173c7b9d23d4e6e1a084a3
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 O=build_dir ARCH=um SUBARCH=i386 SHELL=/bin/bash kernel/cgroup/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <>

All warnings (new ones prefixed by >>):

>> kernel/cgroup/rstat.c:145:22: warning: no previous prototype for 'bpf_rstat_flush' [-Wmissing-prototypes]
145 | __weak noinline void bpf_rstat_flush(struct cgroup *cgrp,
| ^~~~~~~~~~~~~~~

vim +/bpf_rstat_flush +145 kernel/cgroup/rstat.c

144 /* A hook for bpf stat collectors to attach to and flush their stats */
> 145 __weak noinline void bpf_rstat_flush(struct cgroup *cgrp,
146 struct cgroup *parent, int cpu)
147 {
148 }

0-DAY CI Kernel Test Service

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