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compiler-clang.h: Add __diag infrastructure for clang

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Add __diag macros similar to those in compiler-gcc.h, so that warnings
that need to be adjusted for specific cases but not globally can be
ignored when building with clang.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20220304224645.3677453-6-memxor@gmail.com

[ Kartikeya: wrote commit message ]
This commit is contained in:
Nathan Chancellor 2022-03-05 04:16:42 +05:30 committed by Alexei Starovoitov
parent 24d5bb806c
commit f014a00bbe
1 changed files with 22 additions and 0 deletions
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22
include/linux/compiler-clang.h
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@ -68,3 +68,25 @@
#define __nocfi __attribute__((__no_sanitize__("cfi")))
#define __cficanonical __attribute__((__cfi_canonical_jump_table__))
/*
* Turn individual warnings and errors on and off locally, depending
* on version.
*/
#define __diag_clang(version, severity, s) \
__diag_clang_ ## version(__diag_clang_ ## severity s)
/* Severity used in pragma directives */
#define __diag_clang_ignore ignored
#define __diag_clang_warn warning
#define __diag_clang_error error
#define __diag_str1(s) #s
#define __diag_str(s) __diag_str1(s)
#define __diag(s) _Pragma(__diag_str(clang diagnostic s))
#if CONFIG_CLANG_VERSION >= 110000
#define __diag_clang_11(s) __diag(s)
#else
#define __diag_clang_11(s)
#endif