[PATCH i-g-t 2/3] lib/xe_spin: Fix xe_spin_wait_started()
Lucas De Marchi
lucas.demarchi at intel.com
Wed Jul 31 03:35:03 UTC 2024
Use READ_ONCE() to guarantee we are actually reading the memory written
by the GPU and compiler can't optimize it away.
Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
---
lib/xe/xe_spin.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/xe/xe_spin.c b/lib/xe/xe_spin.c
index 3adacc3a8..43a7a43c2 100644
--- a/lib/xe/xe_spin.c
+++ b/lib/xe/xe_spin.c
@@ -166,7 +166,7 @@ void xe_spin_init(struct xe_spin *spin, struct xe_spin_opts *opts)
*/
bool xe_spin_started(struct xe_spin *spin)
{
- return spin->start != 0;
+ return READ_ONCE(spin->start) != 0;
}
/**
--
2.43.0
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