Merge branch 'poll' into staging/for_v3.4

* poll: (5970 commits)
  poll: add poll_requested_events() and poll_does_not_wait() functions
  crc32: select an algorithm via Kconfig
  crc32: add self-test code for crc32c
  crypto: crc32c should use library implementation
  crc32: bolt on crc32c
  crc32: add note about this patchset to crc32.c
  crc32: optimize loop counter for x86
  crc32: add slice-by-8 algorithm to existing code
  crc32: make CRC_*_BITS definition correspond to actual bit counts
  crc32: fix mixing of endian-specific types
  crc32: miscellaneous cleanups
  crc32: simplify unit test code
  crc32: move long comment about crc32 fundamentals to Documentation/
  crc32: remove two instances of trailing whitespaces
  checkpatch: check for quoted strings broken across lines
  checkpatch: whitespace - add/remove blank lines
  checkpatch: warn on use of yield()
  checkpatch: add --strict tests for braces, comments and casts
  checkpatch: add [] to type extensions
  checkpatch: high precedence operators do not require additional parentheses in #defines
  ...

1 files changed, 9 insertions, 15 deletions

diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 408ebd0e7330..06b42b7f5a02 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -4170,14 +4170,16 @@ static int sctp_getsockopt_autoclose(struct sock *sk, int len, char __user *optv
 }
 
 /* Helper routine to branch off an association to a new socket.  */
-SCTP_STATIC int sctp_do_peeloff(struct sctp_association *asoc,
-				struct socket **sockp)
+int sctp_do_peeloff(struct sock *sk, sctp_assoc_t id, struct socket **sockp)
 {
-	struct sock *sk = asoc->base.sk;
+	struct sctp_association *asoc = sctp_id2assoc(sk, id);
 	struct socket *sock;
 	struct sctp_af *af;
 	int err = 0;
 
+	if (!asoc)
+		return -EINVAL;
+
 	/* An association cannot be branched off from an already peeled-off
 	 * socket, nor is this supported for tcp style sockets.
 	 */
@@ -4206,13 +4208,13 @@ SCTP_STATIC int sctp_do_peeloff(struct sctp_association *asoc,
 
 	return err;
 }
+EXPORT_SYMBOL(sctp_do_peeloff);
 
 static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval, int __user *optlen)
 {
 	sctp_peeloff_arg_t peeloff;
 	struct socket *newsock;
 	int retval = 0;
-	struct sctp_association *asoc;
 
 	if (len < sizeof(sctp_peeloff_arg_t))
 		return -EINVAL;
@@ -4220,15 +4222,7 @@ static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval
 	if (copy_from_user(&peeloff, optval, len))
 		return -EFAULT;
 
-	asoc = sctp_id2assoc(sk, peeloff.associd);
-	if (!asoc) {
-		retval = -EINVAL;
-		goto out;
-	}
-
-	SCTP_DEBUG_PRINTK("%s: sk: %p asoc: %p\n", __func__, sk, asoc);
-
-	retval = sctp_do_peeloff(asoc, &newsock);
+	retval = sctp_do_peeloff(sk, peeloff.associd, &newsock);
 	if (retval < 0)
 		goto out;
 
@@ -4239,8 +4233,8 @@ static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval
 		goto out;
 	}
 
-	SCTP_DEBUG_PRINTK("%s: sk: %p asoc: %p newsk: %p sd: %d\n",
-			  __func__, sk, asoc, newsock->sk, retval);
+	SCTP_DEBUG_PRINTK("%s: sk: %p newsk: %p sd: %d\n",
+			  __func__, sk, newsock->sk, retval);
 
 	/* Return the fd mapped to the new socket.  */
 	peeloff.sd = retval;