[pull] master from torvalds:master #1933
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libbpf_err_ptr() helpers are meant to return NULL and set errno, if there is an error. But btf_parse_raw_mmap() is meant to be used internally and is expected to return ERR_PTR() values. Because of this mismatch, when libbpf tries to mmap /sys/kernel/btf/vmlinux, we don't detect the error correctly with IS_ERR() check, and never fallback to old non-mmap-based way of loading vmlinux BTF. Fix this by using proper ERR_PTR() returns internally. Reported-by: Arnaldo Carvalho de Melo <[email protected]> Reviewed-by: Arnaldo Carvalho de Melo <[email protected]> Tested-by: Arnaldo Carvalho de Melo <[email protected]> Fixes: 3c0421c ("libbpf: Use mmap to parse vmlinux BTF from sysfs") Cc: Lorenz Bauer <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Alexei Starovoitov <[email protected]>
When cross compiling the kernel with clang, we need to override CLANG_CROSS_FLAGS when preparing the step libraries. Prior to commit d1d0963 ("tools: fix annoying "mkdir -p ..." logs when building tools in parallel"), MAKEFLAGS would have been set to a value that wouldn't set a value for CLANG_CROSS_FLAGS, hiding the fact that we weren't properly overriding it. Fixes: 56a2df7 ("tools/resolve_btfids: Compile resolve_btfids as host program") Signed-off-by: Suleiman Souhlal <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Acked-by: Jiri Olsa <[email protected]> Cc: [email protected] Link: https://lore.kernel.org/bpf/[email protected]
I've been focusing on networking BPF bits lately, add myself as a reviewer. Signed-off-by: Stanislav Fomichev <[email protected]> Acked-by: KP Singh <[email protected]> Acked-by: Daniel Borkmann <[email protected]> Acked-by: Jakub Kicinski <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Alexei Starovoitov <[email protected]>
…t/bpf/bpf Pull BPF fixes from Alexei Starovoitov - Fix libbpf backward compatibility (Andrii Nakryiko) - Add Stanislav Fomichev as bpf/net reviewer - Fix resolve_btfid build when cross compiling (Suleiman Souhlal) * tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf: MAINTAINERS: Add myself as bpf networking reviewer tools/resolve_btfids: Fix build when cross compiling kernel with clang. libbpf: Handle unsupported mmap-based /sys/kernel/btf/vmlinux correctly
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