linux-kernel - [PATCH] um: random: Don't initialise hwrng struct with zero

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Message-Id: <20220623085842.238829-1-chris.obbard@collabora.com>
Date:   Thu, 23 Jun 2022 09:58:42 +0100
From:   Christopher Obbard <chris.obbard@...labora.com>
To:     linux-um@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, Richard Weinberger <richard@....at>,
        Anton Ivanov <anton.ivanov@...bridgegreys.com>,
        Johannes Berg <johannes@...solutions.net>,
        kernel@...labora.com,
        Christopher Obbard <chris.obbard@...labora.com>,
        kernel test robot <lkp@...el.com>
Subject: [PATCH] um: random: Don't initialise hwrng struct with zero

Initialising the hwrng struct with zeros causes a
compile-time sparse warning:

 $ ARCH=um make -j10 W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'
 ...
 CHECK   arch/um/drivers/random.c
 arch/um/drivers/random.c:31:31: sparse: warning: Using plain integer as NULL pointer

Fix the warning by not initialising the hwrng struct
with zeros as it is initialised anyway during module
init.

Fixes: 72d3e093afae ("um: random: Register random as hwrng-core device")
Reported-by: kernel test robot <lkp@...el.com>
Signed-off-by: Christopher Obbard <chris.obbard@...labora.com>
---
 arch/um/drivers/random.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/um/drivers/random.c b/arch/um/drivers/random.c
index 433a3f8f2ef3..32b3341fe970 100644
--- a/arch/um/drivers/random.c
+++ b/arch/um/drivers/random.c
@@ -28,7 +28,7 @@
  * protects against a module being loaded twice at the same time.
  */
 static int random_fd = -1;
-static struct hwrng hwrng = { 0, };
+static struct hwrng hwrng;
 static DECLARE_COMPLETION(have_data);
 
 static int rng_dev_read(struct hwrng *rng, void *buf, size_t max, bool block)
-- 
2.36.1