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e978d00a3d164610cc0f8ba9a68c8da2a53601b8
linux/kernel/trace
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Nathan Chancellor e978d00a3d tracing: Use address-of operator on section symbols 
[ Upstream commit bf2cbe044d ]

Clang warns:

../kernel/trace/trace.c:9335:33: warning: array comparison always
evaluates to true [-Wtautological-compare]
        if (__stop___trace_bprintk_fmt != __start___trace_bprintk_fmt)
                                       ^
1 warning generated.

These are not true arrays, they are linker defined symbols, which are
just addresses. Using the address of operator silences the warning and
does not change the runtime result of the check (tested with some print
statements compiled in with clang + ld.lld and gcc + ld.bfd in QEMU).

Link: http://lkml.kernel.org/r/20200220051011.26113-1-natechancellor@gmail.com

Link: https://github.com/ClangBuiltLinux/linux/issues/893
Suggested-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-10-01 13:17:44 +02:00
..
blktrace.c
blktrace: ensure our debugfs dir exists
2020-09-03 11:26:42 +02:00
bpf_trace.c
bpf: Fix deadlock with rq_lock in bpf_send_signal()
2020-04-17 10:49:57 +02:00
fgraph.c
ftrace: Look up the address of return_to_handler() using helpers
2019-09-18 12:24:47 +10:00
ftrace_internal.h
treewide: Rename rcu_dereference_raw_notrace() to _check()
2019-08-01 14:16:21 -07:00
ftrace.c
tracing: Use trace_sched_process_free() instead of exit() for pid tracing
2020-08-21 13:05:27 +02:00
Kconfig
Stop the ad-hoc games with -Wno-maybe-initialized
2020-05-20 08:20:28 +02:00
Makefile
tracing: Add unified dynamic event framework
2018-12-08 20:54:09 -05:00
power-traces.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
preemptirq_delay_test.c
tracing: Use trace_clock_local() for looping in preemptirq_delay_test.c
2018-10-17 15:35:33 -04:00
ring_buffer_benchmark.c
tracing: Use CONFIG_PREEMPTION
2019-07-31 19:03:35 +02:00
ring_buffer.c
ring-buffer: Zero out time extend if it is nested and not absolute
2020-06-30 15:37:10 -04:00
rpm-traces.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
trace_benchmark.c
rcu: Rename cond_resched_rcu_qs() to cond_resched_tasks_rcu_qs()
2018-05-15 10:27:29 -07:00
trace_benchmark.h
tracing: Fix SPDX format headers to use C++ style comments
2018-08-16 19:08:06 -04:00
trace_branch.c
x86/uaccess, ftrace: Fix ftrace_likely_update() vs. SMAP
2019-04-03 11:02:24 +02:00
trace_clock.c
tracing: Add SPDX License format tags to tracing files
2018-08-16 19:08:06 -04:00
trace_dynevent.c
tracing: Add tracing_check_open_get_tr()
2019-10-12 20:44:07 -04:00
trace_dynevent.h
tracing/dynevent: Pass extra arguments to match operation
2019-08-31 12:19:38 -04:00
trace_entries.h
tracing: Set kernel_stack's caller size properly
2020-10-01 13:17:29 +02:00
trace_event_perf.c
tracing: Fix race in perf_trace_buf initialization
2019-10-21 19:38:28 -04:00
trace_events_filter_test.h
tracing: Fix SPDX format headers to use C++ style comments
2018-08-16 19:08:06 -04:00
trace_events_filter.c
tracing: Avoid memory leak in process_system_preds()
2020-01-09 10:20:00 +01:00
trace_events_hist.c
tracing: Fix memory leaks in trace_events_hist.c
2020-05-10 10:31:28 +02:00
trace_events_trigger.c
tracing: Fix event trigger to accept redundant spaces
2020-06-30 15:37:10 -04:00
trace_events.c
tracing: Adding NULL checks for trace_array descriptor pointer
2020-10-01 13:17:17 +02:00
trace_export.c
tracing: Add trigger file for trace_markers tracefs/ftrace/print
2018-05-29 08:28:53 -04:00
trace_functions_graph.c
fgraph: Remove redundant ftrace_graph_notrace_addr() test
2019-07-30 21:50:03 -04:00
trace_functions.c
tracing: Update stack trace skipping for ORC unwinder
2018-01-23 15:57:00 -05:00
trace_hwlat.c
tracing/hwlat: Honor the tracing_cpumask
2020-08-21 13:05:27 +02:00
trace_irqsoff.c
Merge tag 'trace-v5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
2019-03-11 17:01:32 -07:00
trace_kdb.c
tracing: Silence GCC 9 array bounds warning
2019-05-25 23:04:30 -04:00
trace_kprobe_selftest.c
selftest/ftrace: Move kprobe selftest function to separate compile unit
2018-07-30 18:41:04 -04:00
trace_kprobe_selftest.h
tracing: Fix SPDX format headers to use C++ style comments
2018-08-16 19:08:06 -04:00
trace_kprobe.c
tracing/probe: Fix bpf_task_fd_query() for kprobes and uprobes
2020-06-24 17:50:43 +02:00
trace_mmiotrace.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
trace_nop.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
trace_output.c
tracing: Be more clever when dumping hex in __print_hex()
2019-09-17 11:21:28 -04:00
trace_output.h
tracing: Fix SPDX format headers to use C++ style comments
2018-08-16 19:08:06 -04:00
trace_preemptirq.c
kprobes: Prohibit probing on hardirq tracers
2019-02-13 08:16:40 +01:00
trace_printk.c
tracing: Add locked_down checks to the open calls of files created for tracefs
2019-10-12 20:48:06 -04:00
trace_probe_tmpl.h
tracing/probe: Support user-space dereference
2019-05-25 23:04:42 -04:00
trace_probe.c
tracing/probe: Fix memleak in fetch_op_data operations
2020-06-24 17:50:51 +02:00
trace_probe.h
tracing/uprobe: Fix to make trace_uprobe_filter alignment safe
2020-02-05 21:22:53 +00:00
trace_sched_switch.c
tracing: Fix sched switch start/stop refcount racy updates
2020-02-11 04:35:07 -08:00
trace_sched_wakeup.c
kernel/trace: Fix do not unregister tracepoints when register sched_migrate_task fail
2020-01-14 20:08:22 +01:00
trace_selftest_dynamic.c
ftrace: Mark function tracer test functions noinline/noclone
2018-01-23 15:57:29 -05:00
trace_selftest.c
function_graph: Have selftest also emulate tr->reset() as it did with tr->init()
2019-04-21 19:46:56 -04:00
trace_seq.c
tracing: Add SPDX License format tags to tracing files
2018-08-16 19:08:06 -04:00
trace_stack.c
tracing: Have stack tracer compile when MCOUNT_INSN_SIZE is not defined
2020-01-14 20:08:22 +01:00
trace_stat.c
tracing: Fix very unlikely race of registering two stat tracers
2020-02-24 08:36:30 +01:00
trace_stat.h
tracing: Fix SPDX format headers to use C++ style comments
2018-08-16 19:08:06 -04:00
trace_syscalls.c
syscalls: Remove start and number from syscall_get_arguments() args
2019-04-05 09:26:43 -04:00
trace_uprobe.c
tracing/probe: Fix bpf_task_fd_query() for kprobes and uprobes
2020-06-24 17:50:43 +02:00
trace.c
tracing: Use address-of operator on section symbols
2020-10-01 13:17:44 +02:00
trace.h
tracing: Move pipe reference to trace array instead of current_tracer
2020-08-21 13:05:27 +02:00
tracing_map.c
tracing: Have the histogram compare functions convert to u64 first
2020-01-09 10:20:00 +01:00
tracing_map.h
tracing: Fix SPDX format headers to use C++ style comments
2018-08-16 19:08:06 -04:00