libbpf: Wrap source argument of BPF_CORE_READ macro in parentheses (bd9bedf8) · Commits · 戴 / test

Wrap source argument of BPF_CORE_READ family of macros into parentheses to allow uses like this: BPF_CORE_READ((struct cast_struct *)src, a, b, c); Fixes: ("libbpf: Add BPF_CORE_READ/BPF_CORE_READ_INTO helpers") Signed-off-by:

Andrii Nakryiko <andriin@fb.com> Signed-off-by:

Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200619231703.738941-8-andriin@fb.com

tools/lib/bpf/bpf_core_read.h

+4 −4

Original line number	Diff line number	Diff line
		@@ -217,7 +217,7 @@ enum bpf_field_info_kind {
		*/
		#define BPF_CORE_READ_INTO(dst, src, a, ...) \
		({ \
		___core_read(bpf_core_read, dst, src, a, ##__VA_ARGS__) \
		___core_read(bpf_core_read, dst, (src), a, ##__VA_ARGS__) \
		})

		/*
		@@ -227,7 +227,7 @@ enum bpf_field_info_kind {
		*/
		#define BPF_CORE_READ_STR_INTO(dst, src, a, ...) \
		({ \
		___core_read(bpf_core_read_str, dst, src, a, ##__VA_ARGS__) \
		___core_read(bpf_core_read_str, dst, (src), a, ##__VA_ARGS__)\
		})

		/*
		@@ -254,8 +254,8 @@ enum bpf_field_info_kind {
		*/
		#define BPF_CORE_READ(src, a, ...) \
		({ \
		___type(src, a, ##__VA_ARGS__) __r; \
		BPF_CORE_READ_INTO(&__r, src, a, ##__VA_ARGS__); \
		___type((src), a, ##__VA_ARGS__) __r; \
		BPF_CORE_READ_INTO(&__r, (src), a, ##__VA_ARGS__); \
		__r; \
		})

Admin message