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srcu: Add KCSAN stubs

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This commit adds stubs for KCSAN's data_race(), ASSERT_EXCLUSIVE_WRITER(),
and ASSERT_EXCLUSIVE_ACCESS() macros to allow code using these macros to
move ahead.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2020-04-13 16:33:01 -07:00
parent 353159365e
commit 4f58820fd7
1 changed files with 13 additions and 0 deletions
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13
kernel/rcu/srcutree.c
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@ -29,6 +29,19 @@
#include "rcu.h" #include "rcu.h"
#include "rcu_segcblist.h" #include "rcu_segcblist.h"
#ifndef data_race
#define data_race(expr) \
({ \
expr; \
})
#endif
#ifndef ASSERT_EXCLUSIVE_WRITER
#define ASSERT_EXCLUSIVE_WRITER(var) do { } while (0)
#endif
#ifndef ASSERT_EXCLUSIVE_ACCESS
#define ASSERT_EXCLUSIVE_ACCESS(var) do { } while (0)
#endif
/* Holdoff in nanoseconds for auto-expediting. */ /* Holdoff in nanoseconds for auto-expediting. */
#define DEFAULT_SRCU_EXP_HOLDOFF (25 * 1000) #define DEFAULT_SRCU_EXP_HOLDOFF (25 * 1000)
static ulong exp_holdoff = DEFAULT_SRCU_EXP_HOLDOFF; static ulong exp_holdoff = DEFAULT_SRCU_EXP_HOLDOFF;