kernel/kcsan/atomic.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2
   3 #ifndef _KERNEL_KCSAN_ATOMIC_H
   4 #define _KERNEL_KCSAN_ATOMIC_H
   5
   6 #include <linux/jiffies.h>
   7 #include <linux/sched.h>
   8
   9 /*
  10  * Special rules for certain memory where concurrent conflicting accesses are
  11  * common, however, the current convention is to not mark them; returns true if
  12  * access to @ptr should be considered atomic. Called from slow-path.
  13  */
  14 static bool kcsan_is_atomic_special(const volatile void *ptr)
  15 {
  16         /* volatile globals that have been observed in data races. */
  17         return ptr == &jiffies || ptr == &current->state;
  18 }
  19
  20 #endif /* _KERNEL_KCSAN_ATOMIC_H */