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Date: Fri, 15 Oct 2021 12:06:47 +0800
From: kernel test robot <lkp@...el.com>
To: "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: kbuild-all@...ts.01.org,
"Gustavo A. R. Silva" <gustavo@...eddedor.com>,
LKML <linux-kernel@...r.kernel.org>,
Steven Rostedt <rostedt@...dmis.org>
Subject: [gustavoars:for-next/cast-function 3/4]
kernel/trace/ftrace.c:7029:6: error: conflicting types for
'arch_ftrace_ops_list_func'
tree: https://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux.git for-next/cast-function
head: 21078041965eb5a2e83d296690a93243611a3c27
commit: c45ede6c27819bb038af313b475fdf50ce755dd6 [3/4] ftrace: Fix -Wmissing-prototypes errors
config: i386-randconfig-r001-20211014 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
# https://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux.git/commit/?id=c45ede6c27819bb038af313b475fdf50ce755dd6
git remote add gustavoars https://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux.git
git fetch --no-tags gustavoars for-next/cast-function
git checkout c45ede6c27819bb038af313b475fdf50ce755dd6
# save the attached .config to linux build tree
mkdir build_dir
make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All errors (new ones prefixed by >>):
In file included from kernel/trace/ftrace.c:29:
include/linux/ftrace.h:49:41: warning: 'struct ftrace_regs' declared inside parameter list will not be visible outside of this definition or declaration
49 | struct ftrace_ops *op, struct ftrace_regs *fregs);
| ^~~~~~~~~~~
kernel/trace/ftrace.c:297:5: warning: no previous prototype for '__register_ftrace_function' [-Wmissing-prototypes]
297 | int __register_ftrace_function(struct ftrace_ops *ops)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
kernel/trace/ftrace.c:340:5: warning: no previous prototype for '__unregister_ftrace_function' [-Wmissing-prototypes]
340 | int __unregister_ftrace_function(struct ftrace_ops *ops)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
kernel/trace/ftrace.c:579:5: warning: no previous prototype for 'ftrace_profile_pages_init' [-Wmissing-prototypes]
579 | int ftrace_profile_pages_init(struct ftrace_profile_stat *stat)
| ^~~~~~~~~~~~~~~~~~~~~~~~~
kernel/trace/ftrace.c:3871:15: warning: no previous prototype for 'arch_ftrace_match_adjust' [-Wmissing-prototypes]
3871 | char * __weak arch_ftrace_match_adjust(char *str, const char *search)
| ^~~~~~~~~~~~~~~~~~~~~~~~
>> kernel/trace/ftrace.c:7029:6: error: conflicting types for 'arch_ftrace_ops_list_func'
7029 | void arch_ftrace_ops_list_func(unsigned long ip, unsigned long parent_ip,
| ^~~~~~~~~~~~~~~~~~~~~~~~~
In file included from kernel/trace/ftrace.c:29:
include/linux/ftrace.h:48:6: note: previous declaration of 'arch_ftrace_ops_list_func' was here
48 | void arch_ftrace_ops_list_func(unsigned long ip, unsigned long parent_ip,
| ^~~~~~~~~~~~~~~~~~~~~~~~~
vim +/arch_ftrace_ops_list_func +7029 kernel/trace/ftrace.c
b848914ce39589 Steven Rostedt 2011-05-04 7011
2f5f6ad9390c1e Steven Rostedt 2011-08-08 7012 /*
2f5f6ad9390c1e Steven Rostedt 2011-08-08 7013 * Some archs only support passing ip and parent_ip. Even though
2f5f6ad9390c1e Steven Rostedt 2011-08-08 7014 * the list function ignores the op parameter, we do not want any
2f5f6ad9390c1e Steven Rostedt 2011-08-08 7015 * C side effects, where a function is called without the caller
2f5f6ad9390c1e Steven Rostedt 2011-08-08 7016 * sending a third parameter.
a1e2e31d175a13 Steven Rostedt 2011-08-09 7017 * Archs are to support both the regs and ftrace_ops at the same time.
a1e2e31d175a13 Steven Rostedt 2011-08-09 7018 * If they support ftrace_ops, it is assumed they support regs.
a1e2e31d175a13 Steven Rostedt 2011-08-09 7019 * If call backs want to use regs, they must either check for regs
06aeaaeabf69da Masami Hiramatsu 2012-09-28 7020 * being NULL, or CONFIG_DYNAMIC_FTRACE_WITH_REGS.
06aeaaeabf69da Masami Hiramatsu 2012-09-28 7021 * Note, CONFIG_DYNAMIC_FTRACE_WITH_REGS expects a full regs to be saved.
a1e2e31d175a13 Steven Rostedt 2011-08-09 7022 * An architecture can pass partial regs with ftrace_ops and still
b8ec330a63eb39 Li Bin 2015-11-30 7023 * set the ARCH_SUPPORTS_FTRACE_OPS.
1bdc308cabc872 Gustavo A. R. Silva 2021-10-13 7024 *
1bdc308cabc872 Gustavo A. R. Silva 2021-10-13 7025 * In vmlinux.lds.h, ftrace_ops_list_func() is defined to be
1bdc308cabc872 Gustavo A. R. Silva 2021-10-13 7026 * arch_ftrace_ops_list_func.
2f5f6ad9390c1e Steven Rostedt 2011-08-08 7027 */
2f5f6ad9390c1e Steven Rostedt 2011-08-08 7028 #if ARCH_SUPPORTS_FTRACE_OPS
1bdc308cabc872 Gustavo A. R. Silva 2021-10-13 @7029 void arch_ftrace_ops_list_func(unsigned long ip, unsigned long parent_ip,
d19ad0775dcd64 Steven Rostedt (VMware 2020-10-28 7030) struct ftrace_ops *op, struct ftrace_regs *fregs)
2f5f6ad9390c1e Steven Rostedt 2011-08-08 7031 {
d19ad0775dcd64 Steven Rostedt (VMware 2020-10-28 7032) __ftrace_ops_list_func(ip, parent_ip, NULL, fregs);
2f5f6ad9390c1e Steven Rostedt 2011-08-08 7033 }
2f5f6ad9390c1e Steven Rostedt 2011-08-08 7034 #else
1bdc308cabc872 Gustavo A. R. Silva 2021-10-13 7035 void arch_ftrace_ops_list_func(unsigned long ip, unsigned long parent_ip)
2f5f6ad9390c1e Steven Rostedt 2011-08-08 7036 {
a1e2e31d175a13 Steven Rostedt 2011-08-09 7037 __ftrace_ops_list_func(ip, parent_ip, NULL, NULL);
2f5f6ad9390c1e Steven Rostedt 2011-08-08 7038 }
2f5f6ad9390c1e Steven Rostedt 2011-08-08 7039 #endif
1bdc308cabc872 Gustavo A. R. Silva 2021-10-13 7040 NOKPROBE_SYMBOL(arch_ftrace_ops_list_func);
2f5f6ad9390c1e Steven Rostedt 2011-08-08 7041
:::::: The code at line 7029 was first introduced by commit
:::::: 1bdc308cabc872d3f6998ba8af9b1e3bc88cea64 ftrace: Fix -Wcast-function-type warnings on powerpc64
:::::: TO: Gustavo A. R. Silva <gustavoars@...nel.org>
:::::: CC: Gustavo A. R. Silva <gustavoars@...nel.org>
---
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