READ/WRITE_ONCE_NOCHECK() is required for atomics in code which cannot be
instrumented like the x86 int3 text poke code. As READ/WRITE_ONCE() is
undergoing a rewrite, provide __{READ,WRITE}_ONCE_SCALAR().Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> --- include/linux/compiler.h | 8 ++++++++ 1 file changed, 8 insertions(+) --- a/include/linux/compiler.h +++ b/include/linux/compiler.h @@ -313,6 +313,14 @@ unsigned long read_word_at_a_time(const __u.__val; \ }) +#define __READ_ONCE_SCALAR(x) \ + (*(const volatile typeof(x) *)&(x)) + +#define __WRITE_ONCE_SCALAR(x, val) \ +do { \ + *(volatile typeof(x) *)&(x) = val; \ +} while (0) + /** * data_race - mark an expression as containing intentional data races *
