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tracing: Disable kcov on trace_preemptirq.c

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Functions in trace_preemptirq.c could be invoked from early interrupt
code that bypasses kcov trace function's in_task() check. Disable kcov
on this file to reduce random code coverage.

Link: https://lkml.kernel.org/r/20220523063033.1778974-1-liu3101@purdue.edu

Acked-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Congyu Liu <liu3101@purdue.edu>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
Congyu Liu 2022-05-23 06:30:33 +00:00 • committed by Steven Rostedt (Google)
parent 154827f8e5
commit bb5eb8f3b3
1 changed files with 4 additions and 0 deletions
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4
kernel/trace/Makefile
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@ -31,6 +31,10 @@ ifdef CONFIG_GCOV_PROFILE_FTRACE
GCOV_PROFILE := y
endif
# Functions in this file could be invoked from early interrupt
# code and produce random code coverage.
KCOV_INSTRUMENT_trace_preemptirq.o := n
CFLAGS_bpf_trace.o := -I$(src)
CFLAGS_trace_benchmark.o := -I$(src)