Messages in this thread | | | Date | Wed, 1 Jun 2022 23:29:24 +0800 | From | kernel test robot <> | Subject | [mark:arm64/ftrace/minimal-regs 5/6] include/linux/ftrace.h:422:57: warning: 'struct ftrace_regs' declared inside parameter list will not be visible outside of this definition or declaration |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git arm64/ftrace/minimal-regs head: b0741d059a9f19a1aa1191833140f53e41f1775a commit: c694698df7f633bcbdf8bc0edb94f4a70ed0d092 [5/6] ftrace: pass fregs to arch_ftrace_set_direct_caller() config: um-i386_defconfig (https://download.01.org/0day-ci/archive/20220601/202206012357.BH7ZUhqM-lkp@intel.com/config) compiler: gcc-11 (Debian 11.3.0-1) 11.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git/commit/?id=c694698df7f633bcbdf8bc0edb94f4a70ed0d092 git remote add mark https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git git fetch --no-tags mark arm64/ftrace/minimal-regs git checkout c694698df7f633bcbdf8bc0edb94f4a70ed0d092 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=um SUBARCH=i386 SHELL=/bin/bash fs/
If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
In file included from include/linux/perf_event.h:51, from include/linux/trace_events.h:10, from include/trace/syscall.h:7, from include/linux/syscalls.h:88, from fs/binfmt_misc.c:27: >> include/linux/ftrace.h:422:57: warning: 'struct ftrace_regs' declared inside parameter list will not be visible outside of this definition or declaration 422 | static inline void arch_ftrace_set_direct_caller(struct ftrace_regs *fregs, | ^~~~~~~~~~~ -- In file included from include/linux/perf_event.h:51, from include/linux/trace_events.h:10, from include/trace/syscall.h:7, from include/linux/syscalls.h:88, from fs/pipe.c:24: >> include/linux/ftrace.h:422:57: warning: 'struct ftrace_regs' declared inside parameter list will not be visible outside of this definition or declaration 422 | static inline void arch_ftrace_set_direct_caller(struct ftrace_regs *fregs, | ^~~~~~~~~~~ fs/pipe.c:757:15: warning: no previous prototype for 'account_pipe_buffers' [-Wmissing-prototypes] 757 | unsigned long account_pipe_buffers(struct user_struct *user, | ^~~~~~~~~~~~~~~~~~~~ fs/pipe.c:763:6: warning: no previous prototype for 'too_many_pipe_buffers_soft' [-Wmissing-prototypes] 763 | bool too_many_pipe_buffers_soft(unsigned long user_bufs) | ^~~~~~~~~~~~~~~~~~~~~~~~~~ fs/pipe.c:770:6: warning: no previous prototype for 'too_many_pipe_buffers_hard' [-Wmissing-prototypes] 770 | bool too_many_pipe_buffers_hard(unsigned long user_bufs) | ^~~~~~~~~~~~~~~~~~~~~~~~~~ fs/pipe.c:777:6: warning: no previous prototype for 'pipe_is_unprivileged_user' [-Wmissing-prototypes] 777 | bool pipe_is_unprivileged_user(void) | ^~~~~~~~~~~~~~~~~~~~~~~~~ fs/pipe.c:1253:5: warning: no previous prototype for 'pipe_resize_ring' [-Wmissing-prototypes] 1253 | int pipe_resize_ring(struct pipe_inode_info *pipe, unsigned int nr_slots) | ^~~~~~~~~~~~~~~~ -- In file included from include/linux/perf_event.h:51, from include/linux/trace_events.h:10, from include/trace/syscall.h:7, from include/linux/syscalls.h:88, from fs/d_path.c:2: >> include/linux/ftrace.h:422:57: warning: 'struct ftrace_regs' declared inside parameter list will not be visible outside of this definition or declaration 422 | static inline void arch_ftrace_set_direct_caller(struct ftrace_regs *fregs, | ^~~~~~~~~~~ fs/d_path.c:318:7: warning: no previous prototype for 'simple_dname' [-Wmissing-prototypes] 318 | char *simple_dname(struct dentry *dentry, char *buffer, int buflen) | ^~~~~~~~~~~~ -- In file included from include/linux/perf_event.h:51, from include/linux/trace_events.h:10, from include/trace/syscall.h:7, from include/linux/syscalls.h:88, from fs/io_uring.c:45: >> include/linux/ftrace.h:422:57: warning: 'struct ftrace_regs' declared inside parameter list will not be visible outside of this definition or declaration 422 | static inline void arch_ftrace_set_direct_caller(struct ftrace_regs *fregs, | ^~~~~~~~~~~ fs/io_uring.c: In function '__io_submit_flush_completions': fs/io_uring.c:3152:40: warning: variable 'prev' set but not used [-Wunused-but-set-variable] 3152 | struct io_wq_work_node *node, *prev; | ^~~~
vim +422 include/linux/ftrace.h
407 408 #ifndef CONFIG_HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS 409 /* 410 * This must be implemented by the architecture. 411 * It is the way the ftrace direct_ops helper, when called 412 * via ftrace (because there's other callbacks besides the 413 * direct call), can inform the architecture's trampoline that this 414 * routine has a direct caller, and what the caller is. 415 * 416 * For example, in x86, it returns the direct caller 417 * callback function via the regs->orig_ax parameter. 418 * Then in the ftrace trampoline, if this is set, it makes 419 * the return from the trampoline jump to the direct caller 420 * instead of going back to the function it just traced. 421 */ > 422 static inline void arch_ftrace_set_direct_caller(struct ftrace_regs *fregs, 423 unsigned long addr) { } 424 #endif /* CONFIG_HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS */ 425
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