Merge branch 'x86/entry' into ras/core

to fixup conflicts in arch/x86/kernel/cpu/mce/core.c so MCE specific follow
up patches can be applied without creating a horrible merge conflict
afterwards.

1 files changed, 15 insertions, 2 deletions

diff --git a/include/linux/socket.h b/include/linux/socket.h
index 54338fac45cb..04d2bc97f497 100644
--- a/include/linux/socket.h
+++ b/include/linux/socket.h
@@ -50,7 +50,17 @@ struct msghdr {
 	void		*msg_name;	/* ptr to socket address structure */
 	int		msg_namelen;	/* size of socket address structure */
 	struct iov_iter	msg_iter;	/* data */
-	void		*msg_control;	/* ancillary data */
+
+	/*
+	 * Ancillary data. msg_control_user is the user buffer used for the
+	 * recv* side when msg_control_is_user is set, msg_control is the kernel
+	 * buffer used for all other cases.
+	 */
+	union {
+		void		*msg_control;
+		void __user	*msg_control_user;
+	};
+	bool		msg_control_is_user : 1;
 	__kernel_size_t	msg_controllen;	/* ancillary data buffer length */
 	unsigned int	msg_flags;	/* flags on received message */
 	struct kiocb	*msg_iocb;	/* ptr to iocb for async requests */
@@ -94,7 +104,10 @@ struct cmsghdr {
 
 #define CMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) )
 
-#define CMSG_DATA(cmsg)	((void *)((char *)(cmsg) + sizeof(struct cmsghdr)))
+#define CMSG_DATA(cmsg) \
+	((void *)(cmsg) + sizeof(struct cmsghdr))
+#define CMSG_USER_DATA(cmsg) \
+	((void __user *)(cmsg) + sizeof(struct cmsghdr))
 #define CMSG_SPACE(len) (sizeof(struct cmsghdr) + CMSG_ALIGN(len))
 #define CMSG_LEN(len) (sizeof(struct cmsghdr) + (len))