* [PATCH bpf-next v3 6/8] compiler_types.h: Add unified __diag_ignore_all for GCC/LLVM
[not found] <20220304000508.2904128-1-memxor@gmail.com>
@ 2022-03-04 0:05 ` Kumar Kartikeya Dwivedi
0 siblings, 0 replies; only message in thread
From: Kumar Kartikeya Dwivedi @ 2022-03-04 0:05 UTC (permalink / raw)
To: bpf; +Cc: Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko, linux-kernel
Add a __diag_ignore_all macro, to ignore warnings for both GCC and LLVM,
without having to specify the compiler type and version. By default, GCC
8 and clang 11 are used. This will be used by bpf subsystem to ignore
-Wmissing-prototypes warning for functions that are meant to be global
functions so that they are in vmlinux BTF, but don't have a prototype.
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
---
include/linux/compiler-clang.h | 3 +++
include/linux/compiler-gcc.h | 3 +++
include/linux/compiler_types.h | 4 ++++
3 files changed, 10 insertions(+)
diff --git a/include/linux/compiler-clang.h b/include/linux/compiler-clang.h
index f1aa41d520bd..babb1347148c 100644
--- a/include/linux/compiler-clang.h
+++ b/include/linux/compiler-clang.h
@@ -90,3 +90,6 @@
#else
#define __diag_clang_11(s)
#endif
+
+#define __diag_ignore_all(option, comment) \
+ __diag_clang(11, ignore, option)
diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h
index ccbbd31b3aae..d364c98a4a80 100644
--- a/include/linux/compiler-gcc.h
+++ b/include/linux/compiler-gcc.h
@@ -151,6 +151,9 @@
#define __diag_GCC_8(s)
#endif
+#define __diag_ignore_all(option, comment) \
+ __diag_GCC(8, ignore, option)
+
/*
* Prior to 9.1, -Wno-alloc-size-larger-than (and therefore the "alloc_size"
* attribute) do not work, and must be disabled.
diff --git a/include/linux/compiler_types.h b/include/linux/compiler_types.h
index 3f31ff400432..8e5d2f50f951 100644
--- a/include/linux/compiler_types.h
+++ b/include/linux/compiler_types.h
@@ -371,4 +371,8 @@ struct ftrace_likely_data {
#define __diag_error(compiler, version, option, comment) \
__diag_ ## compiler(version, error, option)
+#ifndef __diag_ignore_all
+#define __diag_ignore_all(option, comment)
+#endif
+
#endif /* __LINUX_COMPILER_TYPES_H */
--
2.35.1
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