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Date:   Tue,  4 Aug 2020 20:10:32 -0400
From:   Sasha Levin <>
Cc:,,, Sasha Levin <>
Subject: [PATCH v4 03/14] tools/kernel.h: extend with dummy RCU functions

These calls were added by 108c14858b9e ("locking/lockdep: Add support
for dynamic keys") and require no special handling in userspace, so just
add empty function definitions.

Signed-off-by: Sasha Levin <>
 tools/include/linux/kernel.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tools/include/linux/kernel.h b/tools/include/linux/kernel.h
index a7e54a08fb54c..902d3b9ab4c17 100644
--- a/tools/include/linux/kernel.h
+++ b/tools/include/linux/kernel.h
@@ -117,4 +117,11 @@ int scnprintf_pad(char * buf, size_t size, const char * fmt, ...);
 #define current_gfp_context(k) 0
 #define synchronize_rcu()
+static __maybe_unused int system_state;
+#define might_sleep()
+#define rcu_read_lock()
+#define rcu_read_unlock()

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