From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Dmitry Vyukov <dvyukov@google.com>,
Congyu Liu <liu3101@purdue.edu>
Subject: [for-next][PATCH 17/23] tracing: Disable kcov on trace_preemptirq.c
Date: Fri, 27 May 2022 22:50:45 -0400 [thread overview]
Message-ID: <20220528025251.759425831@goodmis.org> (raw)
In-Reply-To: 20220528025028.850906216@goodmis.org
From: Congyu Liu <liu3101@purdue.edu>
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>
---
kernel/trace/Makefile | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile
index d77cd8032213..0d261774d6f3 100644
--- a/kernel/trace/Makefile
+++ b/kernel/trace/Makefile
@@ -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)
--
2.35.1
next prev parent reply other threads:[~2022-05-28 2:54 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-28 2:50 [for-next][PATCH 00/23] tracing: Last minute fixes and updates for 5.19 Steven Rostedt
2022-05-28 2:50 ` [for-next][PATCH 01/23] tracing: Have event format check not flag %p* on __get_dynamic_array() Steven Rostedt
2022-05-28 2:50 ` [for-next][PATCH 02/23] tracing: Reset the function filter after completing trampoline/graph selftest Steven Rostedt
2022-05-28 2:50 ` [for-next][PATCH 03/23] tracing: Use trace_create_file() to simplify creation of tracefs entries Steven Rostedt
2022-05-28 2:50 ` [for-next][PATCH 04/23] ftrace: Deal with error return code of the ftrace_process_locs() function Steven Rostedt
2022-05-28 2:50 ` [for-next][PATCH 05/23] tracing: Use strim() to remove whitespace instead of doing it manually Steven Rostedt
2022-05-28 2:50 ` [for-next][PATCH 06/23] tracing: Fix potential double free in create_var_ref() Steven Rostedt
2022-05-28 2:50 ` [for-next][PATCH 07/23] tracing: Fix return value of trace_pid_write() Steven Rostedt
2022-05-28 2:50 ` [for-next][PATCH 09/23] tracing/timerlat: Notify IRQ new max latency only if stop tracing is set Steven Rostedt
2022-05-28 2:50 ` [for-next][PATCH 10/23] tracing/timerlat: Print stacktrace in the IRQ handler if needed Steven Rostedt
2022-05-28 2:50 ` [for-next][PATCH 11/23] tracing/timerlat: Do not wakeup the thread if the trace stops at the IRQ Steven Rostedt
2022-05-28 2:50 ` [for-next][PATCH 12/23] tracing: Change "char *" string form to "char []" Steven Rostedt
2022-05-28 2:50 ` [for-next][PATCH 13/23] tracing: Cleanup code by removing init "char *name" Steven Rostedt
2022-05-28 2:50 ` [for-next][PATCH 14/23] ftrace: Remove return value of ftrace_arch_modify_*() Steven Rostedt
2022-05-28 2:50 ` [for-next][PATCH 15/23] ftrace: Fix typo in comment Steven Rostedt
2022-05-28 2:50 ` [for-next][PATCH 16/23] tracing: Initialize integer variable to prevent garbage return value Steven Rostedt
2022-05-28 2:50 ` Steven Rostedt [this message]
2022-05-28 2:50 ` [for-next][PATCH 18/23] tracing: Fix comments of create_filter() Steven Rostedt
2022-05-28 2:50 ` [for-next][PATCH 19/23] ftrace: Clean up hash direct_functions on register failures Steven Rostedt
2022-05-28 2:50 ` [for-next][PATCH 20/23] x86,tracing: Remove unused headers Steven Rostedt
2022-05-28 2:50 ` [for-next][PATCH 21/23] x86/traceponit: Fix comment about irq vector tracepoints Steven Rostedt
2022-05-28 2:50 ` [for-next][PATCH 22/23] tracing: Fix comments for event_trigger_separate_filter() Steven Rostedt
2022-05-28 2:50 ` [for-next][PATCH 23/23] ftrace: Add FTRACE_MCOUNT_MAX_OFFSET to avoid adding weak function Steven Rostedt
2022-05-28 3:17 ` [for-next][PATCH 00/23] tracing: Last minute fixes and updates for 5.19 Steven Rostedt
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