From: David Laight <david.laight.linux@gmail.com>
To: linux-kernel@vger.kernel.org, Andrew Morton <akpm@linux-foundation.org>
Cc: David Laight <david.laight.linux@gmail.com>,
"Jason A. Donenfeld" <Jason@zx2c4.com>,
Kir Chou <note351@hotmail.com>,
Ryan Roberts <ryan.roberts@arm.com>,
Mark Rutland <mark.rutland@arm.com>, Kees Cook <kees@kernel.org>
Subject: [PATCH next 5/7] random32: Use add (not xor) in tools prandom_u32_state()
Date: Mon, 2 Nov 2026 20:05:20 +0000 [thread overview]
Message-ID: <20261102200522.3337-6-david.laight.linux@gmail.com> (raw)
In-Reply-To: <20261102200522.3337-1-david.laight.linux@gmail.com>
Matches the main kernel change.
Signed-off-by: David Laight <david.laight.linux@gmail.com>
---
tools/include/linux/prandom.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/include/linux/prandom.h b/tools/include/linux/prandom.h
index b745041ccd6a..56d1422e54a8 100644
--- a/tools/include/linux/prandom.h
+++ b/tools/include/linux/prandom.h
@@ -46,6 +46,6 @@ static inline u32 prandom_u32_state(struct rnd_state *state)
state->s3 = TAUSWORTHE(state->s3, 13U, 21U, 4294967280U, 7U);
state->s4 = TAUSWORTHE(state->s4, 3U, 12U, 4294967168U, 13U);
- return (state->s1 ^ state->s2 ^ state->s3 ^ state->s4);
+ return (state->s1 + state->s2 + state->s3 + state->s4);
}
#endif // __TOOLS_LINUX_PRANDOM_H
--
2.39.5
next prev parent reply other threads:[~2026-11-02 20:05 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-02 20:05 [PATCH next 0/7] random32: Improve security and simplify keying David Laight
2026-11-02 20:05 ` [PATCH next 1/7] random32: Improve security of prandom_u32_state() David Laight
2026-11-02 20:05 ` [PATCH next 2/7] random32: Remove some unnecessary #includes David Laight
2026-11-02 20:05 ` [PATCH next 3/7] random32: Fix tests for xor -> add change to prandom_u32_state() David Laight
2026-11-02 20:05 ` [PATCH next 4/7] random32: Change prandom_seed_state() to be a real function David Laight
2026-11-02 20:05 ` David Laight [this message]
2026-11-02 20:05 ` [PATCH next 6/7] random32: prandom_seed_state() use all 64 bits of the seed David Laight
2026-11-02 20:05 ` [PATCH next 7/7] random32: Simplify prandom_seed_full_state() David Laight
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