Commit 7e766560 authored by Marco Elver's avatar Marco Elver Committed by Paul E. McKenney
Browse files

kcsan: Remove existing special atomic rules 



Remove existing special atomic rules from kcsan_is_atomic_special()
because they are no longer needed. Since we rely on the compiler
emitting instrumentation distinguishing volatile accesses, the rules
have become redundant.

Let's keep kcsan_is_atomic_special() around, so that we have an obvious
place to add special rules should the need arise in future.

Signed-off-by: default avatarMarco Elver <elver@google.com>
Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent acfa087c

kernel/kcsan/atomic.h

+2 −4
Original line number Diff line number Diff line
@@ -3,8 +3,7 @@ 
#ifndef _KERNEL_KCSAN_ATOMIC_H

#define _KERNEL_KCSAN_ATOMIC_H



#include <linux/jiffies.h>

#include <linux/sched.h>

#include <linux/types.h>



/*

 * Special rules for certain memory where concurrent conflicting accesses are
@@ -13,8 +12,7 @@ 
 */

static bool kcsan_is_atomic_special(const volatile void *ptr)

{

	/* volatile globals that have been observed in data races. */

	return ptr == &jiffies || ptr == &current->state;

	return false;

}



#endif /* _KERNEL_KCSAN_ATOMIC_H */