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treewide: Drop function_nocfi

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With -fsanitize=kcfi, we no longer need function_nocfi() as
the compiler won't change function references to point to a
jump table. Remove all implementations and uses of the macro.

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/20220908215504.3686827-14-samitolvanen@google.com
This commit is contained in:
Sami Tolvanen 2022-09-08 14:54:55 -07:00 • committed by Kees Cook
parent 5dbbb3eaa2
commit 607289a7cd
11 changed files with 11 additions and 21 deletions
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10
include/linux/compiler.h
View file

@ -203,16 +203,6 @@ void ftrace_likely_update(struct ftrace_likely_data *f, int val,
__v; \
})
/*
* With CONFIG_CFI_CLANG, the compiler replaces function addresses in
* instrumented C code with jump table addresses. Architectures that
* support CFI can define this macro to return the actual function address
* when needed.
*/
#ifndef function_nocfi
#define function_nocfi(x) (x)
#endif
#endif /* __KERNEL__ */
/*