netdev - [PATCH net-next 02/17] openvswitch: Shrink sw_flow_mask by 8 bytes (64-bit) or 4 bytes (32-bit).

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Message-Id: <1389053776-62865-3-git-send-email-jesse@nicira.com>
Date:	Mon,  6 Jan 2014 16:16:01 -0800
From:	Jesse Gross <jesse@...ira.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, dev@...nvswitch.org,
	Ben Pfaff <blp@...ira.com>, Andy Zhou <azhou@...ira.com>,
	Jesse Gross <jesse@...ira.com>
Subject: [PATCH net-next 02/17] openvswitch: Shrink sw_flow_mask by 8 bytes (64-bit) or 4 bytes (32-bit).

From: Ben Pfaff <blp@...ira.com>

We won't normally have a ton of flow masks but using a size_t to store
values no bigger than sizeof(struct sw_flow_key) seems excessive.

This reduces sw_flow_key_range and sw_flow_mask by 4 bytes on 32-bit
systems.  On 64-bit systems it shrinks sw_flow_key_range by 12 bytes but
sw_flow_mask only by 8 bytes due to padding.

Compile tested only.

Signed-off-by: Ben Pfaff <blp@...ira.com>
Acked-by: Andy Zhou <azhou@...ira.com>
Signed-off-by: Jesse Gross <jesse@...ira.com>
---
 net/openvswitch/flow.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/openvswitch/flow.h b/net/openvswitch/flow.h
index 1510f51..176406d 100644
--- a/net/openvswitch/flow.h
+++ b/net/openvswitch/flow.h
@@ -122,8 +122,8 @@ struct sw_flow_key {
 } __aligned(BITS_PER_LONG/8); /* Ensure that we can do comparisons as longs. */
 
 struct sw_flow_key_range {
-	size_t start;
-	size_t end;
+	unsigned short int start;
+	unsigned short int end;
 };
 
 struct sw_flow_mask {
-- 
1.8.3.2

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