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ftrace/samples: Add missing prototype for my_direct_func
There's compilation fail reported kernel test robot for W=1 build: >> samples/ftrace/ftrace-direct-multi.c:8:6: warning: no previous prototype for function 'my_direct_func' [-Wmissing-prototypes] void my_direct_func(unsigned long ip) The inlined assembly is used outside function, so we can't make my_direct_func static and pass it as asm input argument. However my_tramp is already extern so I think there's no problem keeping my_direct_func extern as well and just add its prototype. Link: https://lkml.kernel.org/r/[email protected] Reported-by: kernel test robot <[email protected]> Fixes: 5fae941 ("ftrace/samples: Add multi direct interface test module") Signed-off-by: Jiri Olsa <[email protected]> Signed-off-by: Steven Rostedt (VMware) <[email protected]>
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