linux-kernel - [PATCH bpf-next v4 6/8] compiler_types.h: Add unified __diag_ignore

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220304224645.3677453-7-memxor@gmail.com>
Date:   Sat,  5 Mar 2022 04:16:43 +0530
From:   Kumar Kartikeya Dwivedi <memxor@...il.com>
To:     bpf@...r.kernel.org
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>, linux-kernel@...r.kernel.org
Subject: [PATCH bpf-next v4 6/8] compiler_types.h: Add unified __diag_ignore_all for GCC/LLVM

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@...r.kernel.org
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@...il.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