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ftrace: Remove unused ftrace_startup_enable() stub

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When building with clang + CONFIG_DYNAMIC_FTRACE=n + W=1, there is a
warning:

  kernel/trace/ftrace.c:7194:20: error: unused function 'ftrace_startup_enable' [-Werror,-Wunused-function]
  static inline void ftrace_startup_enable(int command) { }
                     ^
  1 error generated.

Clang warns on instances of static inline functions in .c files with W=1
after commit 6863f5643d ("kbuild: allow Clang to find unused static
inline functions for W=1 build").

The ftrace_startup_enable() stub has been unused since
commit e1effa0144 ("ftrace: Annotate the ops operation on update"),
where its use outside of the CONFIG_DYNAMIC_TRACE section was replaced
by ftrace_startup_all().  Remove it to resolve the warning.

Link: https://lkml.kernel.org/r/20220214192847.488166-1-nathan@kernel.org

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
Nathan Chancellor 2022-02-14 12:28:47 -07:00 committed by Steven Rostedt (Google)
parent 7acf3a127b
commit ab2f993c01
1 changed files with 0 additions and 1 deletions
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1
kernel/trace/ftrace.c
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@ -7191,7 +7191,6 @@ static int __init ftrace_nodyn_init(void)
core_initcall(ftrace_nodyn_init);
static inline int ftrace_init_dyn_tracefs(struct dentry *d_tracer) { return 0; }
static inline void ftrace_startup_enable(int command) { }
static inline void ftrace_startup_all(int command) { }
# define ftrace_startup_sysctl() do { } while (0)