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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/include/uapi/linux/socket.h
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@@ -6,17 +6,24 @@
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  * Desired design of maximum size and alignment (see RFC2553)
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  */
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 #define _K_SS_MAXSIZE	128	/* Implementation specific max size */
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-#define _K_SS_ALIGNSIZE	(__alignof__ (struct sockaddr *))
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-				/* Implementation specific desired alignment */
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 typedef unsigned short __kernel_sa_family_t;
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+/*
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+ * The definition uses anonymous union and struct in order to control the
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+ * default alignment.
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+ */
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 struct __kernel_sockaddr_storage {
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-	__kernel_sa_family_t	ss_family;		/* address family */
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-	/* Following field(s) are implementation specific */
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-	char		__data[_K_SS_MAXSIZE - sizeof(unsigned short)];
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+	union {
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+		struct {
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+			__kernel_sa_family_t	ss_family; /* address family */
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+			/* Following field(s) are implementation specific */
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+			char __data[_K_SS_MAXSIZE - sizeof(unsigned short)];
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 				/* space to achieve desired size, */
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 				/* _SS_MAXSIZE value minus size of ss_family */
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-} __attribute__ ((aligned(_K_SS_ALIGNSIZE)));	/* force desired alignment */
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+		};
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+		void *__align; /* implementation specific desired alignment */
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+	};
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+};
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 #endif /* _UAPI_LINUX_SOCKET_H */