From: rmilecki Date: Tue, 8 Sep 2015 16:43:10 +0000 (+0000) Subject: kernel: describe bridge patch "remove IPv6 depependency of bridge in 2.6.38+" X-Git-Url: https://git.archive.openwrt.org/?p=openwrt.git;a=commitdiff_plain;h=007acd711956679b023f32af06407ce53fb091bd kernel: describe bridge patch "remove IPv6 depependency of bridge in 2.6.38+" It was initially added in r27237 by jow as patch from Jonas. git-svn-id: svn://svn.openwrt.org/openwrt/trunk@46826 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- diff --git a/target/linux/generic/patches-3.18/643-bridge_remove_ipv6_dependency.patch b/target/linux/generic/patches-3.18/643-bridge_remove_ipv6_dependency.patch index 3f0dcd3ae2..25f49c0c19 100644 --- a/target/linux/generic/patches-3.18/643-bridge_remove_ipv6_dependency.patch +++ b/target/linux/generic/patches-3.18/643-bridge_remove_ipv6_dependency.patch @@ -1,3 +1,16 @@ +From: Jonas Gorski +Subject: [PATCH] bridge: remove IPv6 depependency of bridge in 2.6.38+ + +Since 2.6.38 the bridge module has a dependency to IPv6 if IPv6 is +enabled. Since the IPv6 module isn't exactly lightweight and bridge also +only needs a single function from IPv6, it's rather easy to create a +common "lib" module with a RCU pointer to the actual implementation, if +the IPv6 module is loaded (although slightly hackish). + +The codepath seems to be only taken when using IPv6, so there should be +no negative side effects when IPv6 isn't loaded. I did not measure how +big the performance impact is. +--- --- a/include/net/addrconf.h +++ b/include/net/addrconf.h @@ -88,6 +88,12 @@ int ipv6_rcv_saddr_equal(const struct so diff --git a/target/linux/generic/patches-4.0/643-bridge_remove_ipv6_dependency.patch b/target/linux/generic/patches-4.0/643-bridge_remove_ipv6_dependency.patch index 50e4fe4b10..6842d97746 100644 --- a/target/linux/generic/patches-4.0/643-bridge_remove_ipv6_dependency.patch +++ b/target/linux/generic/patches-4.0/643-bridge_remove_ipv6_dependency.patch @@ -1,3 +1,16 @@ +From: Jonas Gorski +Subject: [PATCH] bridge: remove IPv6 depependency of bridge in 2.6.38+ + +Since 2.6.38 the bridge module has a dependency to IPv6 if IPv6 is +enabled. Since the IPv6 module isn't exactly lightweight and bridge also +only needs a single function from IPv6, it's rather easy to create a +common "lib" module with a RCU pointer to the actual implementation, if +the IPv6 module is loaded (although slightly hackish). + +The codepath seems to be only taken when using IPv6, so there should be +no negative side effects when IPv6 isn't loaded. I did not measure how +big the performance impact is. +--- --- a/include/net/addrconf.h +++ b/include/net/addrconf.h @@ -91,6 +91,12 @@ int ipv6_rcv_saddr_equal(const struct so diff --git a/target/linux/generic/patches-4.1/643-bridge_remove_ipv6_dependency.patch b/target/linux/generic/patches-4.1/643-bridge_remove_ipv6_dependency.patch index 001d2c6258..b18f33e962 100644 --- a/target/linux/generic/patches-4.1/643-bridge_remove_ipv6_dependency.patch +++ b/target/linux/generic/patches-4.1/643-bridge_remove_ipv6_dependency.patch @@ -1,3 +1,16 @@ +From: Jonas Gorski +Subject: [PATCH] bridge: remove IPv6 depependency of bridge in 2.6.38+ + +Since 2.6.38 the bridge module has a dependency to IPv6 if IPv6 is +enabled. Since the IPv6 module isn't exactly lightweight and bridge also +only needs a single function from IPv6, it's rather easy to create a +common "lib" module with a RCU pointer to the actual implementation, if +the IPv6 module is loaded (although slightly hackish). + +The codepath seems to be only taken when using IPv6, so there should be +no negative side effects when IPv6 isn't loaded. I did not measure how +big the performance impact is. +--- --- a/include/net/addrconf.h +++ b/include/net/addrconf.h @@ -91,6 +91,12 @@ int ipv6_rcv_saddr_equal(const struct so