mirror of
https://github.com/torvalds/linux.git
synced 2024-12-22 02:52:56 +00:00
5c587f9b9c
This is a revert of commit 1947bfcf81 ("tools/memory-model: Add types
to litmus tests") with conflict resolutions.
klitmus7 [1] is aware of default types of "int" and "int*".
It accepts litmus tests for herd7 without extra type info unless
non-"int" variables are referenced by an "exists", "locations",
or "filter" directive.
[1]: Tested with klitmus7 versions 7.49 or later.
Suggested-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Akira Yokosawa <akiyks@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
33 lines
452 B
Plaintext
33 lines
452 B
Plaintext
C SB+rfionceonce-poonceonces
|
|
|
|
(*
|
|
* Result: Sometimes
|
|
*
|
|
* This litmus test demonstrates that LKMM is not fully multicopy atomic.
|
|
*)
|
|
|
|
{}
|
|
|
|
P0(int *x, int *y)
|
|
{
|
|
int r1;
|
|
int r2;
|
|
|
|
WRITE_ONCE(*x, 1);
|
|
r1 = READ_ONCE(*x);
|
|
r2 = READ_ONCE(*y);
|
|
}
|
|
|
|
P1(int *x, int *y)
|
|
{
|
|
int r3;
|
|
int r4;
|
|
|
|
WRITE_ONCE(*y, 1);
|
|
r3 = READ_ONCE(*y);
|
|
r4 = READ_ONCE(*x);
|
|
}
|
|
|
|
locations [0:r1; 1:r3; x; y] (* Debug aid: Print things not in "exists". *)
|
|
exists (0:r2=0 /\ 1:r4=0)
|