linux_dsm_epyc7002/kernel/trace
Steven Rostedt (VMware) 2bbb320656 Revert: "ring-buffer: Remove HAVE_64BIT_ALIGNED_ACCESS"
commit adab66b71abfe206a020f11e561f4df41f0b2aba upstream.

It was believed that metag was the only architecture that required the ring
buffer to keep 8 byte words aligned on 8 byte architectures, and with its
removal, it was assumed that the ring buffer code did not need to handle
this case. It appears that sparc64 also requires this.

The following was reported on a sparc64 boot up:

   kernel: futex hash table entries: 65536 (order: 9, 4194304 bytes, linear)
   kernel: Running postponed tracer tests:
   kernel: Testing tracer function:
   kernel: Kernel unaligned access at TPC[552a20] trace_function+0x40/0x140
   kernel: Kernel unaligned access at TPC[552a24] trace_function+0x44/0x140
   kernel: Kernel unaligned access at TPC[552a20] trace_function+0x40/0x140
   kernel: Kernel unaligned access at TPC[552a24] trace_function+0x44/0x140
   kernel: Kernel unaligned access at TPC[552a20] trace_function+0x40/0x140
   kernel: PASSED

Need to put back the 64BIT aligned code for the ring buffer.

Link: https://lore.kernel.org/r/CADxRZqzXQRYgKc=y-KV=S_yHL+Y8Ay2mh5ezeZUnpRvg+syWKw@mail.gmail.com

Cc: stable@vger.kernel.org
Fixes: 86b3de60a0 ("ring-buffer: Remove HAVE_64BIT_ALIGNED_ACCESS")
Reported-by: Anatoly Pugachev <matorola@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-12-30 11:54:29 +01:00
..
blktrace.c
bpf_trace.c bpf: Fix bpf_put_raw_tracepoint()'s use of __module_address() 2020-12-30 11:53:34 +01:00
bpf_trace.h
fgraph.c
ftrace_internal.h
ftrace.c ftrace: Fix updating FTRACE_FL_TRAMP 2020-11-30 21:43:07 -05:00
Kconfig ftrace: Fix DYNAMIC_FTRACE_WITH_DIRECT_CALLS dependency 2020-11-30 21:43:08 -05:00
kprobe_event_gen_test.c
Makefile
power-traces.c
preemptirq_delay_test.c
ring_buffer_benchmark.c
ring_buffer.c Revert: "ring-buffer: Remove HAVE_64BIT_ALIGNED_ACCESS" 2020-12-30 11:54:29 +01:00
rpm-traces.c
synth_event_gen_test.c
trace_benchmark.c
trace_benchmark.h
trace_boot.c tracing: Disable ftrace selftests when any tracer is running 2020-12-30 11:54:28 +01:00
trace_branch.c
trace_clock.c
trace_dynevent.c
trace_dynevent.h
trace_entries.h
trace_event_perf.c
trace_events_filter_test.h
trace_events_filter.c
trace_events_hist.c
trace_events_inject.c
trace_events_synth.c tracing: Make -ENOMEM the default error for parse_synth_field() 2020-11-02 15:58:32 -05:00
trace_events_trigger.c
trace_events.c tracing: Disable ftrace selftests when any tracer is running 2020-12-30 11:54:28 +01:00
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
trace_functions.c
trace_hwlat.c tracing: Remove WARN_ON in start_thread() 2020-11-30 21:43:07 -05:00
trace_irqsoff.c
trace_kdb.c
trace_kprobe_selftest.c
trace_kprobe_selftest.h
trace_kprobe.c tracing: Disable ftrace selftests when any tracer is running 2020-12-30 11:54:28 +01:00
trace_mmiotrace.c
trace_nop.c
trace_output.c
trace_output.h
trace_preemptirq.c
trace_printk.c
trace_probe_tmpl.h
trace_probe.c
trace_probe.h
trace_sched_switch.c
trace_sched_wakeup.c
trace_selftest_dynamic.c
trace_selftest.c tracing: Disable ftrace selftests when any tracer is running 2020-12-30 11:54:28 +01:00
trace_seq.c
trace_stack.c
trace_stat.c
trace_stat.h
trace_synth.h
trace_syscalls.c
trace_uprobe.c
trace.c tracing: Disable ftrace selftests when any tracer is running 2020-12-30 11:54:28 +01:00
trace.h tracing: Disable ftrace selftests when any tracer is running 2020-12-30 11:54:28 +01:00
tracing_map.c
tracing_map.h