netdev - [PATCH 1/6] net: remove sock_poll_busy

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Message-Id: <20180628142059.10017-2-hch@lst.de>
Date:   Thu, 28 Jun 2018 16:20:54 +0200
From:   Christoph Hellwig <hch@....de>
To:     Alexander Viro <viro@...iv.linux.org.uk>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-fsdevel@...r.kernel.org, netdev@...r.kernel.org, lkp@...org
Subject: [PATCH 1/6] net: remove sock_poll_busy_flag

Can simplify be inlined into the only caller.

Signed-off-by: Christoph Hellwig <hch@....de>
---
 include/net/busy_poll.h | 6 ------
 net/socket.c            | 5 ++++-
 2 files changed, 4 insertions(+), 7 deletions(-)

diff --git a/include/net/busy_poll.h b/include/net/busy_poll.h
index c5187438af38..4a459a0d70d1 100644
--- a/include/net/busy_poll.h
+++ b/include/net/busy_poll.h
@@ -130,12 +130,6 @@ static inline void sock_poll_busy_loop(struct socket *sock, __poll_t events)
 	}
 }
 
-/* if this socket can poll_ll, tell the system call */
-static inline __poll_t sock_poll_busy_flag(struct socket *sock)
-{
-	return sk_can_busy_loop(sock->sk) ? POLL_BUSY_LOOP : 0;
-}
-
 /* used in the NIC receive handler to mark the skb */
 static inline void skb_mark_napi_id(struct sk_buff *skb,
 				    struct napi_struct *napi)
diff --git a/net/socket.c b/net/socket.c
index 8a109012608a..0f397fa33614 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -1171,7 +1171,10 @@ static __poll_t sock_poll(struct file *file, poll_table *wait)
 		mask = sock->ops->poll_mask(sock, events);
 	}
 
-	return mask | sock_poll_busy_flag(sock);
+	/* this socket can poll_ll so tell the system call */
+	if (sk_can_busy_loop(sock->sk))
+		mask |= POLL_BUSY_LOOP;
+	return mask;
 }
 
 static int sock_mmap(struct file *file, struct vm_area_struct *vma)
-- 
2.17.1