Re: [PATCH -next 2/4] cgroup: bpf: Add BPF_MAP_TYPE_CGROUP_ARRAY

From: kbuild test robot
Date: Tue Jun 21 2016 - 22:34:31 EST


Hi,

[auto build test ERROR on next-20160621]

url: https://github.com/0day-ci/linux/commits/Martin-KaFai-Lau/cgroup-bpf-cgroup2-membership-test-on-skb/20160622-082800
config: m68k-sun3_defconfig (attached as .config)
compiler: m68k-linux-gcc (GCC) 4.9.0
reproduce:
wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=m68k

All error/warnings (new ones prefixed by >>):

kernel/bpf/arraymap.c: In function 'cgroup_fd_array_get_ptr':
>> kernel/bpf/arraymap.c:547:2: error: implicit declaration of function 'cgroup_get_from_fd' [-Werror=implicit-function-declaration]
return cgroup_get_from_fd(fd);
^
>> kernel/bpf/arraymap.c:547:2: warning: return makes pointer from integer without a cast
kernel/bpf/arraymap.c: In function 'cgroup_fd_array_put_ptr':
>> kernel/bpf/arraymap.c:553:2: error: implicit declaration of function 'cgroup_put' [-Werror=implicit-function-declaration]
cgroup_put(ptr);
^
cc1: some warnings being treated as errors

vim +/cgroup_get_from_fd +547 kernel/bpf/arraymap.c

541 late_initcall(register_perf_event_array_map);
542
543 static void *cgroup_fd_array_get_ptr(struct bpf_map *map,
544 struct file *map_file /* not used */,
545 int fd)
546 {
> 547 return cgroup_get_from_fd(fd);
548 }
549
550 static void cgroup_fd_array_put_ptr(void *ptr)
551 {
552 /* cgroup_put free cgrp after a rcu grace period */
> 553 cgroup_put(ptr);
554 }
555
556 static void cgroup_fd_array_free(struct bpf_map *map)

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