diff options
| author | Sami Tolvanen <samitolvanen@google.com> | 2022-09-09 00:54:56 +0300 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2022-09-26 20:13:14 +0300 |
| commit | 4b24356312fbe1bace72f9905d529b14fc34c1c3 (patch) | |
| tree | 29bbd70d6008c86cb06627b88eeefe7566c9340d /include/asm-generic | |
| parent | 607289a7cd7a3ca42b8a6877fcb6072e6eb20c34 (diff) | |
| download | linux-4b24356312fbe1bace72f9905d529b14fc34c1c3.tar.xz | |
treewide: Drop WARN_ON_FUNCTION_MISMATCH
CONFIG_CFI_CLANG no longer breaks cross-module function address
equality, which makes WARN_ON_FUNCTION_MISMATCH unnecessary. Remove
the definition and switch back to WARN_ON_ONCE.
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Tested-by: Kees Cook <keescook@chromium.org>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220908215504.3686827-15-samitolvanen@google.com
Diffstat (limited to 'include/asm-generic')
| -rw-r--r-- | include/asm-generic/bug.h | 16 |
1 files changed, 0 insertions, 16 deletions
diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h index ba1f860af38b..4050b191e1a9 100644 --- a/include/asm-generic/bug.h +++ b/include/asm-generic/bug.h @@ -220,22 +220,6 @@ extern __printf(1, 2) void __warn_printk(const char *fmt, ...); # define WARN_ON_SMP(x) ({0;}) #endif -/* - * WARN_ON_FUNCTION_MISMATCH() warns if a value doesn't match a - * function address, and can be useful for catching issues with - * callback functions, for example. - * - * With CONFIG_CFI_CLANG, the warning is disabled because the - * compiler replaces function addresses taken in C code with - * local jump table addresses, which breaks cross-module function - * address equality. - */ -#if defined(CONFIG_CFI_CLANG) && defined(CONFIG_MODULES) -# define WARN_ON_FUNCTION_MISMATCH(x, fn) ({ 0; }) -#else -# define WARN_ON_FUNCTION_MISMATCH(x, fn) WARN_ON_ONCE((x) != (fn)) -#endif - #endif /* __ASSEMBLY__ */ #endif |