Messages in this thread Patch in this message | | | Date | Mon, 23 Aug 2021 10:13:08 -0700 | Subject | [PATCH v2 04/14] ftrace: Use an opaque type for functions not callable from C | From | Sami Tolvanen <> |
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With CONFIG_CFI_CLANG, the compiler changes function references to point to the CFI jump table. As ftrace_call, ftrace_regs_call, and mcount_call are not called from C, use DECLARE_ASM_FUNC_SYMBOL to declare them.
Signed-off-by: Sami Tolvanen <samitolvanen@google.com> --- include/linux/ftrace.h | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h index a69f363b61bf..6fdfbcc14608 100644 --- a/include/linux/ftrace.h +++ b/include/linux/ftrace.h @@ -578,9 +578,10 @@ extern void ftrace_replace_code(int enable); extern int ftrace_update_ftrace_func(ftrace_func_t func); extern void ftrace_caller(void); extern void ftrace_regs_caller(void); -extern void ftrace_call(void); -extern void ftrace_regs_call(void); -extern void mcount_call(void); + +DECLARE_ASM_FUNC_SYMBOL(ftrace_call); +DECLARE_ASM_FUNC_SYMBOL(ftrace_regs_call); +DECLARE_ASM_FUNC_SYMBOL(mcount_call); void ftrace_modify_all_code(int command); -- 2.33.0.rc2.250.ged5fa647cd-goog
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