xiaomi-sm8450/android_kernel_xiaomi_sm8450
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b02414c8f045ab3b9afc816c3735bc98c5c3d262
android_kernel_xiaomi_sm8450/kernel/trace
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Steven Rostedt (VMware) b02414c8f0 ring-buffer: Fix recursion protection transitions between interrupt context 
The recursion protection of the ring buffer depends on preempt_count() to be
correct. But it is possible that the ring buffer gets called after an
interrupt comes in but before it updates the preempt_count(). This will
trigger a false positive in the recursion code.

Use the same trick from the ftrace function callback recursion code which
uses a "transition" bit that gets set, to allow for a single recursion for
to handle transitions between contexts.

Cc: stable@vger.kernel.org
Fixes: 567cd4da54 ("ring-buffer: User context bit recursion checking")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2020-11-02 15:58:32 -05:00
..
blktrace.c
block: add a bdget_part helper
2020-10-05 10:38:33 -06:00
bpf_trace.c
Merge tag 'net-next-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
2020-10-15 18:42:13 -07:00
bpf_trace.h
bpf: Use dedicated bpf_trace_printk event instead of trace_printk()
2020-07-13 16:55:49 -07:00
fgraph.c
fgraph: Convert ret_stack tasklist scanning to rcu
2020-09-21 21:06:02 -04:00
ftrace_internal.h
x86/ftrace: Have ftrace trampolines turn read-only at the end of system boot up
2020-05-12 18:24:34 -04:00
ftrace.c
Merge tag 'trace-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
2020-10-15 15:51:28 -07:00
Kconfig
Merge tag 'trace-v5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
2020-06-09 10:06:18 -07:00
kprobe_event_gen_test.c
tracing: Add kprobe event command generation test module
2020-01-30 09:46:28 -05:00
Makefile
Merge tag 'kbuild-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
2020-08-09 14:10:26 -07:00
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: Wait for preempt irq delay thread to execute
2020-05-11 17:00:34 -04:00
ring_buffer_benchmark.c
sched,tracing: Convert to sched_set_fifo()
2020-07-29 11:43:53 +02:00
ring_buffer.c
ring-buffer: Fix recursion protection transitions between interrupt context
2020-11-02 15:58:32 -05:00
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
synth_event_gen_test.c
tracing: Add support for dynamic strings to synthetic events
2020-10-05 19:32:18 -04:00
trace_benchmark.c
trace: Use pr_warn instead of pr_warning
2019-10-18 15:01:57 +02:00
trace_benchmark.h
tracing: Fix SPDX format headers to use C++ style comments
2018-08-16 19:08:06 -04:00
trace_boot.c
tracing/boot: Add ftrace.instance.*.alloc_snapshot option
2020-10-15 12:01:13 -04:00
trace_branch.c
tracing: Make struct ring_buffer less ambiguous
2020-01-13 13:19:38 -05:00
trace_clock.c
tracing: Add SPDX License format tags to tracing files
2018-08-16 19:08:06 -04:00
trace_dynevent.c
tracing: Delete repeated words in comments
2020-09-21 21:06:02 -04:00
trace_dynevent.h
tracing: Remove check_arg() callbacks from dynevent args
2020-02-01 13:09:23 -05:00
trace_entries.h
tracing: Make ftrace packed events have align of 1
2020-06-16 21:21:02 -04:00
trace_event_perf.c
Merge branch 'perf/urgent' into perf/core, to pick up fixes
2019-10-28 12:38:26 +01:00
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
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
trace_events_hist.c
tracing: Check return value of __create_val_fields() before using its result
2020-10-15 12:00:59 -04:00
trace_events_inject.c
tracing: Initialize val to zero in parse_entry of inject code
2020-01-02 19:04:57 -05:00
trace_events_synth.c
tracing, synthetic events: Replace buggy strcat() with seq_buf operations
2020-10-27 09:25:36 -04:00
trace_events_trigger.c
tracing: Fix event trigger to accept redundant spaces
2020-06-23 21:51:40 -04:00
trace_events.c
Merge tag 'trace-v5.10-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
2020-10-16 14:56:52 -07:00
trace_export.c
treewide: Convert macro and uses of __section(foo) to __section("foo")
2020-10-25 14:51:49 -07:00
trace_functions_graph.c
tracing: make tracing_init_dentry() returns an integer instead of a d_entry pointer
2020-09-18 22:17:14 -04:00
trace_functions.c
tracing: Enable creating new instance early boot
2020-09-21 21:06:04 -04:00
trace_hwlat.c
tracing: make tracing_init_dentry() returns an integer instead of a d_entry pointer
2020-09-18 22:17:14 -04:00
trace_irqsoff.c
tracing: Rename trace_buffer to array_buffer
2020-01-13 13:19:38 -05:00
trace_kdb.c
tracing: Rename trace_buffer to array_buffer
2020-01-13 13:19:38 -05:00
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
kprobes: Use module_name() macro
2020-09-24 15:55:49 +02:00
trace_mmiotrace.c
tracing: Make struct ring_buffer less ambiguous
2020-01-13 13:19:38 -05:00
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: Make the space reserved for the pid wider
2020-09-18 12:42:11 -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
lockdep: fix order in trace_hardirqs_off_caller()
2020-09-14 10:08:07 +02:00
trace_printk.c
Merge tag 'trace-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
2020-10-15 15:51:28 -07:00
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
2020-06-16 21:21:02 -04:00
trace_probe.h
tracing: Move is_good_name() from trace_probe.h to trace.h
2020-10-15 12:01:13 -04:00
trace_sched_switch.c
tracing: Fix sched switch start/stop refcount racy updates
2020-01-30 09:46:10 -05:00
trace_sched_wakeup.c
tracing: Make struct ring_buffer less ambiguous
2020-01-13 13:19:38 -05:00
trace_selftest_dynamic.c
ftrace: Mark function tracer test functions noinline/noclone
2018-01-23 15:57:29 -05:00
trace_selftest.c
ftrace: Handle tracing when switching between context
2020-11-02 08:52:18 -05:00
trace_seq.c
tracing: Remove unused TRACE_SEQ_BUF_USED
2020-01-21 18:39:54 -05:00
trace_stack.c
tracing: make tracing_init_dentry() returns an integer instead of a d_entry pointer
2020-09-18 22:17:14 -04:00
trace_stat.c
tracing: make tracing_init_dentry() returns an integer instead of a d_entry pointer
2020-09-18 22:17:14 -04:00
trace_stat.h
tracing: Use generic type for comparator function
2019-11-14 13:15:11 -05:00
trace_synth.h
tracing: Add support for dynamic strings to synthetic events
2020-10-05 19:32:18 -04:00
trace_syscalls.c
Merge tag 'trace-v5.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
2020-02-06 07:12:11 +00:00
trace_uprobe.c
tracing/uprobes: Support perf-style return probe
2020-09-21 21:06:03 -04:00
trace.c
tracing: Fix the checking of stackidx in __ftrace_trace_stack
2020-11-02 11:21:40 -05:00
trace.h
ftrace: Handle tracing when switching between context
2020-11-02 08:52:18 -05:00
tracing_map.c
tracing: Delete repeated words in comments
2020-09-21 21:06:02 -04:00
tracing_map.h
tracing: Fix SPDX format headers to use C++ style comments
2018-08-16 19:08:06 -04:00