linux-kernel - [PATCH 5.7 4/6] random32: remove net_rand_state from the latent entropy gcc plugin

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Message-Id: <20200805153507.183761235@linuxfoundation.org>
Date:   Wed,  5 Aug 2020 17:52:31 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Stephen Rothwell <sfr@...b.auug.org.au>,
        Emese Revfy <re.emese@...il.com>,
        Kees Cook <keescook@...omium.org>, Willy Tarreau <w@....eu>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: [PATCH 5.7 4/6] random32: remove net_rand_state from the latent entropy gcc plugin

From: Linus Torvalds <torvalds@...ux-foundation.org>

commit 83bdc7275e6206f560d247be856bceba3e1ed8f2 upstream.

It turns out that the plugin right now ends up being really unhappy
about the change from 'static' to 'extern' storage that happened in
commit f227e3ec3b5c ("random32: update the net random state on interrupt
and activity").

This is probably a trivial fix for the latent_entropy plugin, but for
now, just remove net_rand_state from the list of things the plugin
worries about.

Reported-by: Stephen Rothwell <sfr@...b.auug.org.au>
Cc: Emese Revfy <re.emese@...il.com>
Cc: Kees Cook <keescook@...omium.org>
Cc: Willy Tarreau <w@....eu>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 include/linux/random.h |    2 +-
 lib/random32.c         |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

--- a/include/linux/random.h
+++ b/include/linux/random.h
@@ -120,7 +120,7 @@ struct rnd_state {
 	__u32 s1, s2, s3, s4;
 };
 
-DECLARE_PER_CPU(struct rnd_state, net_rand_state) __latent_entropy;
+DECLARE_PER_CPU(struct rnd_state, net_rand_state);
 
 u32 prandom_u32_state(struct rnd_state *state);
 void prandom_bytes_state(struct rnd_state *state, void *buf, size_t nbytes);
--- a/lib/random32.c
+++ b/lib/random32.c
@@ -48,7 +48,7 @@ static inline void prandom_state_selftes
 }
 #endif
 
-DEFINE_PER_CPU(struct rnd_state, net_rand_state) __latent_entropy;
+DEFINE_PER_CPU(struct rnd_state, net_rand_state);
 
 /**
  *	prandom_u32_state - seeded pseudo-random number generator.