linux-kernel - [PATCH v2] vmbus/ring_buffer: remove some redundant helper function.

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Message-Id: <1516871556-31151-1-git-send-email-Tianyu.Lan@microsoft.com>
Date:   Thu, 25 Jan 2018 17:12:36 +0800
From:   lantianyu1986@...il.com
To:     unlisted-recipients:; (no To-header on input)
Cc:     Tianyu Lan <Tianyu.Lan@...rosoft.com>, kys@...rosoft.com,
        haiyangz@...rosoft.com, sthemmin@...rosoft.com,
        devel@...uxdriverproject.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2] vmbus/ring_buffer: remove some redundant helper function.

From: Tianyu Lan <Tianyu.Lan@...rosoft.com>

Some hv_get/set** helper functions in ring_buffer code are
only called once or not used. This patch is to clear up these codes.

Signed-off-by: Tianyu Lan <Tianyu.Lan@...rosoft.com>
---
Change since v1:
	Clear up more hv_get/set** functions.
---
 drivers/hv/ring_buffer.c | 49 ++++--------------------------------------------
 1 file changed, 4 insertions(+), 45 deletions(-)

diff --git a/drivers/hv/ring_buffer.c b/drivers/hv/ring_buffer.c
index 12eb8ca..af3001f 100644
--- a/drivers/hv/ring_buffer.c
+++ b/drivers/hv/ring_buffer.c
@@ -78,46 +78,6 @@ static void hv_signal_on_write(u32 old_write, struct vmbus_channel *channel)
 		vmbus_setevent(channel);
 }
 
-/* Get the next write location for the specified ring buffer. */
-static inline u32
-hv_get_next_write_location(struct hv_ring_buffer_info *ring_info)
-{
-	u32 next = ring_info->ring_buffer->write_index;
-
-	return next;
-}
-
-/* Set the next write location for the specified ring buffer. */
-static inline void
-hv_set_next_write_location(struct hv_ring_buffer_info *ring_info,
-		     u32 next_write_location)
-{
-	ring_info->ring_buffer->write_index = next_write_location;
-}
-
-/* Set the next read location for the specified ring buffer. */
-static inline void
-hv_set_next_read_location(struct hv_ring_buffer_info *ring_info,
-		    u32 next_read_location)
-{
-	ring_info->ring_buffer->read_index = next_read_location;
-	ring_info->priv_read_index = next_read_location;
-}
-
-/* Get the size of the ring buffer. */
-static inline u32
-hv_get_ring_buffersize(const struct hv_ring_buffer_info *ring_info)
-{
-	return ring_info->ring_datasize;
-}
-
-/* Get the read and write indices as u64 of the specified ring buffer. */
-static inline u64
-hv_get_ring_bufferindices(struct hv_ring_buffer_info *ring_info)
-{
-	return (u64)ring_info->ring_buffer->write_index << 32;
-}
-
 /*
  * Helper routine to copy from source to ring buffer.
  * Assume there is enough room. Handles wrap-around in dest case only!!
@@ -129,7 +89,7 @@ static u32 hv_copyto_ringbuffer(
 	u32				srclen)
 {
 	void *ring_buffer = hv_get_ring_buffer(ring_info);
-	u32 ring_buffer_size = hv_get_ring_buffersize(ring_info);
+	u32 ring_buffer_size = ring_info->ring_datasize;
 
 	memcpy(ring_buffer + start_write_offset, src, srclen);
 
@@ -252,8 +212,7 @@ int hv_ringbuffer_write(struct vmbus_channel *channel,
 	}
 
 	/* Write to the ring buffer */
-	next_write_location = hv_get_next_write_location(outring_info);
-
+	next_write_location = outring_info->ring_buffer->write_index;
 	old_write = next_write_location;
 
 	for (i = 0; i < kv_count; i++) {
@@ -264,7 +223,7 @@ int hv_ringbuffer_write(struct vmbus_channel *channel,
 	}
 
 	/* Set previous packet start */
-	prev_indices = hv_get_ring_bufferindices(outring_info);
+	prev_indices = (u64)outring_info->ring_buffer->write_index << 32;
 
 	next_write_location = hv_copyto_ringbuffer(outring_info,
 					     next_write_location,
@@ -275,7 +234,7 @@ int hv_ringbuffer_write(struct vmbus_channel *channel,
 	virt_mb();
 
 	/* Now, update the write location */
-	hv_set_next_write_location(outring_info, next_write_location);
+	outring_info->ring_buffer->write_index = next_write_location;
 
 
 	spin_unlock_irqrestore(&outring_info->ring_lock, flags);
-- 
2.7.4