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Revert "tracing: Fix sleeping while atomic in kdb ftdump"

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This reverts commit 426656e8dd which is
commit 495fcec864 upstream.

It breaks the Android kernel abi, and is not needed for any Android
devices at this time.  If it is needed in the future, it can be brought
back in an abi-safe way.

Bug: 161946584
Change-Id: Iafb5d7fa1dd6f80b941f28a2b9e6d56adc6ceb17
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Greg Kroah-Hartman
2023-08-28 15:30:56 +00:00
parent df0f5bd7a8
commit 06fab437d7
1 changed files with 5 additions and 6 deletions
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11
kernel/trace/trace.c
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@@ -9445,12 +9445,6 @@ void trace_init_global_iter(struct trace_iterator *iter)
/* Output in nanoseconds only if we are using a clock in nanoseconds. */
if (trace_clocks[iter->tr->clock_id].in_ns)
iter->iter_flags |= TRACE_FILE_TIME_IN_NS;
/* Can not use kmalloc for iter.temp and iter.fmt */
iter->temp = static_temp_buf;
iter->temp_size = STATIC_TEMP_BUF_SIZE;
iter->fmt = static_fmt_buf;
iter->fmt_size = STATIC_FMT_BUF_SIZE;
}
void ftrace_dump(enum ftrace_dump_mode oops_dump_mode)
@@ -9486,6 +9480,11 @@ void ftrace_dump(enum ftrace_dump_mode oops_dump_mode)
/* Simulate the iterator */
trace_init_global_iter(&iter);
/* Can not use kmalloc for iter.temp and iter.fmt */
iter.temp = static_temp_buf;
iter.temp_size = STATIC_TEMP_BUF_SIZE;
iter.fmt = static_fmt_buf;
iter.fmt_size = STATIC_FMT_BUF_SIZE;
for_each_tracing_cpu(cpu) {
atomic_inc(&per_cpu_ptr(iter.array_buffer->data, cpu)->disabled);