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[XTF PATCH v1 04/15] common: harden type checks in ACCESS_ONCE()
- To: xen-devel@xxxxxxxxxxxxxxxxxxxx
- From: dmukhin@xxxxxxxx
- Date: Wed, 4 Nov 2026 17:38:06 -0800
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- Cc: andrew.cooper3@xxxxxxxxxx, anthony.perard@xxxxxxxxxx, jbeulich@xxxxxxxx, julien@xxxxxxx, michal.orzel@xxxxxxx, roger@xxxxxxxxxxxxxx, sstabellini@xxxxxxxxxx, dmukhin@xxxxxxx, Denis Mukhin <dmukhin@xxxxxxxx>
- Delivery-date: Thu, 05 Nov 2026 01:38:43 +0000
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From: Denis Mukhin <dmukhin@xxxxxxxx>
Signed-off-by: Denis Mukhin <dmukhin@xxxxxxxx>
---
include/xtf/lib.h | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/include/xtf/lib.h b/include/xtf/lib.h
index 9ced1e795258..629de4904d60 100644
--- a/include/xtf/lib.h
+++ b/include/xtf/lib.h
@@ -7,7 +7,11 @@
#define ARRAY_SIZE(a) (sizeof(a) / sizeof(*a))
-#define ACCESS_ONCE(x) (*(volatile typeof(x) *)&(x))
+#define __ACCESS_ONCE(x) ({ \
+ (void)(typeof(x))0; \
+ (volatile typeof(x) *)&(x); \
+})
+#define ACCESS_ONCE(x) (*__ACCESS_ONCE(x))
void __noreturn panic(const char *fmt, ...) __printf(1, 2);
--
2.55.0
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