linux-kernel - [PATCH] fs : Fix warning using plain integer as NULL

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Message-Id: <20231108104730.1007713-1-singhabhinav9051571833@gmail.com>
Date:   Wed,  8 Nov 2023 16:17:30 +0530
From:   Abhinav Singh <singhabhinav9051571833@...il.com>
To:     viro@...iv.linux.org.uk, brauner@...nel.org,
        dan.j.williams@...el.com, willy@...radead.org, jack@...e.cz
Cc:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        nvdimm@...ts.linux.dev,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        Abhinav Singh <singhabhinav9051571833@...il.com>
Subject: [PATCH] fs : Fix warning using plain integer as NULL

Sparse static analysis tools generate a warning with this message
"Using plain integer as NULL pointer". In this case this warning is
being shown because we are trying to initialize  pointer to NULL using
integer value 0.

Signed-off-by: Abhinav Singh <singhabhinav9051571833@...il.com>
Reviewed-by: Jan Kara <jack@...e.cz>
---
 fs/dax.c       | 2 +-
 fs/direct-io.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/dax.c b/fs/dax.c
index 3380b43cb6bb..423fc1607dfa 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -1128,7 +1128,7 @@ static int dax_iomap_copy_around(loff_t pos, uint64_t length, size_t align_size,
 	/* zero the edges if srcmap is a HOLE or IOMAP_UNWRITTEN */
 	bool zero_edge = srcmap->flags & IOMAP_F_SHARED ||
 			 srcmap->type == IOMAP_UNWRITTEN;
-	void *saddr = 0;
+	void *saddr = NULL;
 	int ret = 0;
 
 	if (!zero_edge) {
diff --git a/fs/direct-io.c b/fs/direct-io.c
index 20533266ade6..60456263a338 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -1114,7 +1114,7 @@ ssize_t __blockdev_direct_IO(struct kiocb *iocb, struct inode *inode,
 	loff_t offset = iocb->ki_pos;
 	const loff_t end = offset + count;
 	struct dio *dio;
-	struct dio_submit sdio = { 0, };
+	struct dio_submit sdio = { NULL, };
 	struct buffer_head map_bh = { 0, };
 	struct blk_plug plug;
 	unsigned long align = offset | iov_iter_alignment(iter);
-- 
2.39.2