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Message-ID: <202411281612.F29skJjy-lkp@intel.com>
Date: Thu, 28 Nov 2024 16:42:47 +0800
From: kernel test robot <lkp@...el.com>
To: "Masami Hiramatsu (Google)" <mhiramat@...nel.org>,
Steven Rostedt <rostedt@...dmis.org>,
Naveen N Rao <naveen@...nel.org>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>,
Masami Hiramatsu <mhiramat@...nel.org>,
"David S . Miller" <davem@...emloft.net>,
Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
Oleg Nesterov <oleg@...hat.com>,
Tzvetomir Stoyanov <tz.stoyanov@...il.com>,
linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org
Subject: Re: [PATCH 6/6] tracing/dynevent: Adopt guard() and scoped_guard()
Hi Masami,
kernel test robot noticed the following build errors:
[auto build test ERROR on linus/master]
[also build test ERROR on v6.12 next-20241128]
[cannot apply to rostedt-trace/for-next rostedt-trace/for-next-urgent]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Masami-Hiramatsu-Google/tracing-eprobe-Fix-to-release-eprobe-when-failed-to-add-dyn_event/20241128-100853
base: linus/master
patch link: https://lore.kernel.org/r/173262943230.8323.4595317585229847937.stgit%40devnote2
patch subject: [PATCH 6/6] tracing/dynevent: Adopt guard() and scoped_guard()
config: arm-randconfig-001-20241128 (https://download.01.org/0day-ci/archive/20241128/202411281612.F29skJjy-lkp@intel.com/config)
compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project 592c0fe55f6d9a811028b5f3507be91458ab2713)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241128/202411281612.F29skJjy-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202411281612.F29skJjy-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from kernel/trace/trace_dynevent.c:11:
In file included from include/linux/mm.h:2223:
include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
518 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
| ~~~~~~~~~~~ ^ ~~~
>> kernel/trace/trace_dynevent.c:105:3: error: cannot jump from this goto statement to its label
105 | goto out;
| ^
kernel/trace/trace_dynevent.c:108:2: note: jump bypasses initialization of variable with __attribute__((cleanup))
108 | guard(mutex)(&event_mutex);
| ^
include/linux/cleanup.h:315:15: note: expanded from macro 'guard'
315 | CLASS(_name, __UNIQUE_ID(guard))
| ^
include/linux/compiler.h:189:29: note: expanded from macro '__UNIQUE_ID'
189 | #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
| ^
include/linux/compiler_types.h:84:22: note: expanded from macro '__PASTE'
84 | #define __PASTE(a,b) ___PASTE(a,b)
| ^
include/linux/compiler_types.h:83:23: note: expanded from macro '___PASTE'
83 | #define ___PASTE(a,b) a##b
| ^
<scratch space>:162:1: note: expanded from here
162 | __UNIQUE_ID_guard315
| ^
kernel/trace/trace_dynevent.c:92:4: error: cannot jump from this goto statement to its label
92 | goto out;
| ^
kernel/trace/trace_dynevent.c:108:2: note: jump bypasses initialization of variable with __attribute__((cleanup))
108 | guard(mutex)(&event_mutex);
| ^
include/linux/cleanup.h:315:15: note: expanded from macro 'guard'
315 | CLASS(_name, __UNIQUE_ID(guard))
| ^
include/linux/compiler.h:189:29: note: expanded from macro '__UNIQUE_ID'
189 | #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
| ^
include/linux/compiler_types.h:84:22: note: expanded from macro '__PASTE'
84 | #define __PASTE(a,b) ___PASTE(a,b)
| ^
include/linux/compiler_types.h:83:23: note: expanded from macro '___PASTE'
83 | #define ___PASTE(a,b) a##b
| ^
<scratch space>:162:1: note: expanded from here
162 | __UNIQUE_ID_guard315
| ^
kernel/trace/trace_dynevent.c:85:4: error: cannot jump from this goto statement to its label
85 | goto out;
| ^
kernel/trace/trace_dynevent.c:108:2: note: jump bypasses initialization of variable with __attribute__((cleanup))
108 | guard(mutex)(&event_mutex);
| ^
include/linux/cleanup.h:315:15: note: expanded from macro 'guard'
315 | CLASS(_name, __UNIQUE_ID(guard))
| ^
include/linux/compiler.h:189:29: note: expanded from macro '__UNIQUE_ID'
189 | #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
| ^
include/linux/compiler_types.h:84:22: note: expanded from macro '__PASTE'
84 | #define __PASTE(a,b) ___PASTE(a,b)
| ^
include/linux/compiler_types.h:83:23: note: expanded from macro '___PASTE'
83 | #define ___PASTE(a,b) a##b
| ^
<scratch space>:162:1: note: expanded from here
162 | __UNIQUE_ID_guard315
| ^
1 warning and 3 errors generated.
vim +105 kernel/trace/trace_dynevent.c
5448d44c38557f Masami Hiramatsu 2018-11-05 @11 #include <linux/mm.h>
5448d44c38557f Masami Hiramatsu 2018-11-05 12 #include <linux/mutex.h>
5448d44c38557f Masami Hiramatsu 2018-11-05 13 #include <linux/tracefs.h>
5448d44c38557f Masami Hiramatsu 2018-11-05 14
5448d44c38557f Masami Hiramatsu 2018-11-05 15 #include "trace.h"
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 16) #include "trace_output.h" /* for trace_event_sem */
5448d44c38557f Masami Hiramatsu 2018-11-05 17 #include "trace_dynevent.h"
5448d44c38557f Masami Hiramatsu 2018-11-05 18
5448d44c38557f Masami Hiramatsu 2018-11-05 19 static DEFINE_MUTEX(dyn_event_ops_mutex);
5448d44c38557f Masami Hiramatsu 2018-11-05 20 static LIST_HEAD(dyn_event_ops_list);
5448d44c38557f Masami Hiramatsu 2018-11-05 21
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 22) bool trace_event_dyn_try_get_ref(struct trace_event_call *dyn_call)
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 23) {
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 24) struct trace_event_call *call;
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 25) bool ret = false;
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 26)
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 27) if (WARN_ON_ONCE(!(dyn_call->flags & TRACE_EVENT_FL_DYNAMIC)))
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 28) return false;
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 29)
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 30) down_read(&trace_event_sem);
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 31) list_for_each_entry(call, &ftrace_events, list) {
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 32) if (call == dyn_call) {
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 33) atomic_inc(&dyn_call->refcnt);
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 34) ret = true;
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 35) }
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 36) }
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 37) up_read(&trace_event_sem);
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 38) return ret;
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 39) }
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 40)
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 41) void trace_event_dyn_put_ref(struct trace_event_call *call)
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 42) {
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 43) if (WARN_ON_ONCE(!(call->flags & TRACE_EVENT_FL_DYNAMIC)))
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 44) return;
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 45)
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 46) if (WARN_ON_ONCE(atomic_read(&call->refcnt) <= 0)) {
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 47) atomic_set(&call->refcnt, 0);
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 48) return;
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 49) }
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 50)
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 51) atomic_dec(&call->refcnt);
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 52) }
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 53)
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 54) bool trace_event_dyn_busy(struct trace_event_call *call)
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 55) {
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 56) return atomic_read(&call->refcnt) != 0;
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 57) }
1d18538e6a0926 Steven Rostedt (VMware 2021-08-16 58)
5448d44c38557f Masami Hiramatsu 2018-11-05 59 int dyn_event_register(struct dyn_event_operations *ops)
5448d44c38557f Masami Hiramatsu 2018-11-05 60 {
5448d44c38557f Masami Hiramatsu 2018-11-05 61 if (!ops || !ops->create || !ops->show || !ops->is_busy ||
5448d44c38557f Masami Hiramatsu 2018-11-05 62 !ops->free || !ops->match)
5448d44c38557f Masami Hiramatsu 2018-11-05 63 return -EINVAL;
5448d44c38557f Masami Hiramatsu 2018-11-05 64
5448d44c38557f Masami Hiramatsu 2018-11-05 65 INIT_LIST_HEAD(&ops->list);
79cc5c1710963f Masami Hiramatsu (Google 2024-11-26 66) guard(mutex)(&dyn_event_ops_mutex);
5448d44c38557f Masami Hiramatsu 2018-11-05 67 list_add_tail(&ops->list, &dyn_event_ops_list);
5448d44c38557f Masami Hiramatsu 2018-11-05 68 return 0;
5448d44c38557f Masami Hiramatsu 2018-11-05 69 }
5448d44c38557f Masami Hiramatsu 2018-11-05 70
d262271d04830e Masami Hiramatsu 2021-02-01 71 int dyn_event_release(const char *raw_command, struct dyn_event_operations *type)
5448d44c38557f Masami Hiramatsu 2018-11-05 72 {
5448d44c38557f Masami Hiramatsu 2018-11-05 73 struct dyn_event *pos, *n;
5448d44c38557f Masami Hiramatsu 2018-11-05 74 char *system = NULL, *event, *p;
d262271d04830e Masami Hiramatsu 2021-02-01 75 int argc, ret = -ENOENT;
d262271d04830e Masami Hiramatsu 2021-02-01 76 char **argv;
d262271d04830e Masami Hiramatsu 2021-02-01 77
d262271d04830e Masami Hiramatsu 2021-02-01 78 argv = argv_split(GFP_KERNEL, raw_command, &argc);
d262271d04830e Masami Hiramatsu 2021-02-01 79 if (!argv)
d262271d04830e Masami Hiramatsu 2021-02-01 80 return -ENOMEM;
5448d44c38557f Masami Hiramatsu 2018-11-05 81
1ce25e9f6fff76 Masami Hiramatsu 2018-11-05 82 if (argv[0][0] == '-') {
d262271d04830e Masami Hiramatsu 2021-02-01 83 if (argv[0][1] != ':') {
d262271d04830e Masami Hiramatsu 2021-02-01 84 ret = -EINVAL;
d262271d04830e Masami Hiramatsu 2021-02-01 85 goto out;
d262271d04830e Masami Hiramatsu 2021-02-01 86 }
5448d44c38557f Masami Hiramatsu 2018-11-05 87 event = &argv[0][2];
1ce25e9f6fff76 Masami Hiramatsu 2018-11-05 88 } else {
1ce25e9f6fff76 Masami Hiramatsu 2018-11-05 89 event = strchr(argv[0], ':');
d262271d04830e Masami Hiramatsu 2021-02-01 90 if (!event) {
d262271d04830e Masami Hiramatsu 2021-02-01 91 ret = -EINVAL;
d262271d04830e Masami Hiramatsu 2021-02-01 92 goto out;
d262271d04830e Masami Hiramatsu 2021-02-01 93 }
1ce25e9f6fff76 Masami Hiramatsu 2018-11-05 94 event++;
1ce25e9f6fff76 Masami Hiramatsu 2018-11-05 95 }
1ce25e9f6fff76 Masami Hiramatsu 2018-11-05 96
5448d44c38557f Masami Hiramatsu 2018-11-05 97 p = strchr(event, '/');
5448d44c38557f Masami Hiramatsu 2018-11-05 98 if (p) {
5448d44c38557f Masami Hiramatsu 2018-11-05 99 system = event;
5448d44c38557f Masami Hiramatsu 2018-11-05 100 event = p + 1;
5448d44c38557f Masami Hiramatsu 2018-11-05 101 *p = '\0';
5448d44c38557f Masami Hiramatsu 2018-11-05 102 }
95c104c378dc7d Linyu Yuan 2022-06-27 103 if (!system && event[0] == '\0') {
8db403b9631331 Christophe JAILLET 2021-04-11 104 ret = -EINVAL;
8db403b9631331 Christophe JAILLET 2021-04-11 @105 goto out;
8db403b9631331 Christophe JAILLET 2021-04-11 106 }
5448d44c38557f Masami Hiramatsu 2018-11-05 107
79cc5c1710963f Masami Hiramatsu (Google 2024-11-26 108) guard(mutex)(&event_mutex);
5448d44c38557f Masami Hiramatsu 2018-11-05 109 for_each_dyn_event_safe(pos, n) {
5448d44c38557f Masami Hiramatsu 2018-11-05 110 if (type && type != pos->ops)
5448d44c38557f Masami Hiramatsu 2018-11-05 111 continue;
30199137c899d7 Masami Hiramatsu 2019-06-20 112 if (!pos->ops->match(system, event,
d262271d04830e Masami Hiramatsu 2021-02-01 113 argc - 1, (const char **)argv + 1, pos))
cb8e7a8d55e052 Masami Hiramatsu 2019-06-20 114 continue;
cb8e7a8d55e052 Masami Hiramatsu 2019-06-20 115
5448d44c38557f Masami Hiramatsu 2018-11-05 116 ret = pos->ops->free(pos);
cb8e7a8d55e052 Masami Hiramatsu 2019-06-20 117 if (ret)
5448d44c38557f Masami Hiramatsu 2018-11-05 118 break;
5448d44c38557f Masami Hiramatsu 2018-11-05 119 }
4313e5a613049d Steven Rostedt (Google 2022-11-23 120) tracing_reset_all_online_cpus();
d262271d04830e Masami Hiramatsu 2021-02-01 121 out:
d262271d04830e Masami Hiramatsu 2021-02-01 122 argv_free(argv);
5448d44c38557f Masami Hiramatsu 2018-11-05 123 return ret;
5448d44c38557f Masami Hiramatsu 2018-11-05 124 }
5448d44c38557f Masami Hiramatsu 2018-11-05 125
--
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