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In arraymap.c: In bpf_array_map_seq_start() and bpf_array_map_seq_next() cast return values from the __percpu address space to the generic address space via uintptr_t [1]. Correct the declaration of pptr pointer in __bpf_array_map_seq_show() to void __percpu * and cast the value from the generic address space to the __percpu address space via uintptr_t [1]. In hashtab.c: Assign the return value from bpf_mem_cache_alloc() to void pointer and cast the value to void __percpu ** (void pointer to percpu void pointer) before dereferencing. In memalloc.c: Explicitly declare __percpu variables. Cast obj to void __percpu **. In helpers.c: Cast ptr in BPF_CALL_1 and BPF_CALL_2 from generic address space to __percpu address space via const uintptr_t [1]. Found by GCC's named address space checks. There were no changes in the resulting object files. [1] https://sparse.docs.kernel.org/en/latest/annotations.html#address-space-name Signed-off-by: Uros Bizjak <ubizjak@gmail.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Andrii Nakryiko <andrii@kernel.org> Cc: Martin KaFai Lau <martin.lau@linux.dev> Cc: Eduard Zingerman <eddyz87@gmail.com> Cc: Song Liu <song@kernel.org> Cc: Yonghong Song <yonghong.song@linux.dev> Cc: John Fastabend <john.fastabend@gmail.com> Cc: KP Singh <kpsingh@kernel.org> Cc: Stanislav Fomichev <sdf@fomichev.me> Cc: Hao Luo <haoluo@google.com> Cc: Jiri Olsa <jolsa@kernel.org> Acked-by: Eduard Zingerman <eddyz87@gmail.com>
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Pull request for series with
subject: bpf: Fix percpu address space issues
version: 2
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=878542