path: root/net
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authorMatthieu Baerts <matthieu.baerts@tessares.net>2020-10-21 12:51:53 +0200
committerJakub Kicinski <kuba@kernel.org>2020-10-21 08:05:40 -0700
commit0ed37ac586c01fd5bf3f7559de79f1d621ccf192 (patch)
tree4ef0fdcd1b2f0e278e9af6750b5792cb6716ff5f /net
parent05f90bf3d5df40e1a705527520e5fd56b2b6f09e (diff)
mptcp: depends on IPV6 but not as a module
Like TCP, MPTCP cannot be compiled as a module. Obviously, MPTCP IPv6' support also depends on CONFIG_IPV6. But not all functions from IPv6 code are exported. To simplify the code and reduce modifications outside MPTCP, it was decided from the beginning to support MPTCP with IPv6 only if CONFIG_IPV6 was built inlined. That's also why CONFIG_MPTCP_IPV6 was created. More modifications are needed to support CONFIG_IPV6=m. Even if it was not explicit, until recently, we were forcing CONFIG_IPV6 to be built-in because we had "select IPV6" in Kconfig. Now that we have "depends on IPV6", we have to explicitly set "IPV6=y" to force CONFIG_IPV6 not to be built as a module. In other words, we can now only have CONFIG_MPTCP_IPV6=y if CONFIG_IPV6=y. Note that the new dependency might hide the fact IPv6 is not supported in MPTCP even if we have CONFIG_IPV6=m. But selecting IPV6 like we did before was forcing it to be built-in while it was maybe not what the user wants. Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Fixes: 010b430d5df5 ("mptcp: MPTCP_IPV6 should depend on IPV6 instead of selecting it") Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net> Link: https://lore.kernel.org/r/20201021105154.628257-1-matthieu.baerts@tessares.net Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net')
1 files changed, 1 insertions, 1 deletions
diff --git a/net/mptcp/Kconfig b/net/mptcp/Kconfig
index 8936604b3bf9..a014149aa323 100644
--- a/net/mptcp/Kconfig
+++ b/net/mptcp/Kconfig
@@ -19,7 +19,7 @@ config INET_MPTCP_DIAG
config MPTCP_IPV6
bool "MPTCP: IPv6 support for Multipath TCP"
- depends on IPV6
+ depends on IPV6=y
default y