linux-kernel - [PATCH net-next] net/tcp_sigpool: Enable compile-testing

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Message-ID: <95d8884780f3682637f0e93049cc484545464ef9.1764860099.git.geert+renesas@glider.be>
Date: Thu,  4 Dec 2025 15:57:31 +0100
From: Geert Uytterhoeven <geert+renesas@...der.be>
To: Eric Biggers <ebiggers@...nel.org>,
	Dmitry Safonov <0x7f454c46@...il.com>,
	Francesco Ruggeri <fruggeri@...sta.com>,
	Salam Noureddine <noureddine@...sta.com>,
	"David S . Miller" <davem@...emloft.net>,
	David Ahern <dsahern@...nel.org>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Simon Horman <horms@...nel.org>
Cc: netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [PATCH net-next] net/tcp_sigpool: Enable compile-testing

Since commit 37a183d3b7cdb873 ("tcp: Convert tcp-md5 to use MD5 library
instead of crypto_ahash"), TCP_SIGPOOL is only selected by TCP_AO.
However, the latter depends on 64BIT, so tcp_sigpool can no longer be
built on 32-bit platforms at all.

Improve compile coverage on 32-bit by allowing the user to enable
TCP_SIGPOOL when compile-testing.  Add a dependency on CRYPTO, which is
always fulfilled when selected by TCP_AO.

Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
---
One remaining oddity is that TCP_SIGPOOL has always been a tristate
symbol, while all users that select it have always been boolean symbols.
I kept that as-is, as it builds fine as a module.
---
 net/ipv4/Kconfig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/ipv4/Kconfig b/net/ipv4/Kconfig
index b71c22475c515ffc..7280d1b1dae1ba53 100644
--- a/net/ipv4/Kconfig
+++ b/net/ipv4/Kconfig
@@ -743,7 +743,8 @@ config DEFAULT_TCP_CONG
 	default "cubic"
 
 config TCP_SIGPOOL
-	tristate
+	tristate "TCP: Per-CPU pool of crypto requests" if COMPILE_TEST
+	depends on CRYPTO
 
 config TCP_AO
 	bool "TCP: Authentication Option (RFC5925)"
-- 
2.43.0