git: 57775b3be6be - main - arm64/smmu: Fix undefined behaviour in Q_OVF

The branch main has been updated by andrew:

URL: https://cgit.FreeBSD.org/src/commit/?id=57775b3be6be253f3612f5b0a74dc9bf2b36d6d7

commit 57775b3be6be253f3612f5b0a74dc9bf2b36d6d7
Author:     Andrew Turner <andrew@FreeBSD.org>
AuthorDate: 2026-07-28 14:04:50 +0000
Commit:     Andrew Turner <andrew@FreeBSD.org>
CommitDate: 2026-08-26 11:31:36 +0000

    arm64/smmu: Fix undefined behaviour in Q_OVF
    
    "1 << 31" is a signed int left shift 31 which is undefined as the shift
    is too large. Use an unsigned int to make the value defined.
    
    Sponsored by:   Arm Ltd
---
 sys/arm64/iommu/smmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/arm64/iommu/smmu.c b/sys/arm64/iommu/smmu.c
index 2d34b9177ed7..9a6f15e83def 100644
--- a/sys/arm64/iommu/smmu.c
+++ b/sys/arm64/iommu/smmu.c
@@ -142,7 +142,7 @@
 
 #define	Q_WRP(q, p)		((p) & (1 << (q)->size_log2))
 #define	Q_IDX(q, p)		((p) & ((1 << (q)->size_log2) - 1))
-#define	Q_OVF(p)		((p) & (1 << 31)) /* Event queue overflowed */
+#define	Q_OVF(p)		((p) & (1u << 31)) /* Event queue overflowed */
 
 #define	SMMU_Q_ALIGN		(64 * 1024)