linux-kernel - [PATCH v2] Signed-off-by: Biancaa Ramesh <biancaa2210329@....edu.in>

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Message-ID: <20251022043108.7197-1-biancaa2210329@ssn.edu.in>
Date: Wed, 22 Oct 2025 10:01:07 +0530
From: Biancaa Ramesh <biancaa2210329@....edu.in>
To: sumit.semwal@...aro.org
Cc: christian.koenig@....com,
	linux-media@...r.kernel.org,
	dri-devel@...ts.freedesktop.org,
	linaro-mm-sig@...ts.linaro.org,
	linux-kernel@...r.kernel.org,
	lkp@...el.com,
	Biancaa Ramesh <biancaa2210329@....edu.in>
Subject: [PATCH v2] Signed-off-by: Biancaa Ramesh <biancaa2210329@....edu.in>

dma-buf: improve dma_buf_show_fdinfo output

Improve the readability of /proc/<pid>/fdinfo output for DMA-BUF by
including file flags and ensuring consistent format specifiers for size
and other fields.

This patch also fixes incorrect format specifiers and removes references
to obsolete struct members (num_attachments and num_mappings) that no
longer exist in the DMA-BUF framework.

Reported-by: kernel test robot <lkp@...el.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202510220802.svbgdYsJ-lkp@intel.com/
---
 drivers/dma-buf/dma-buf.c | 26 ++++++++++++--------------
 1 file changed, 12 insertions(+), 14 deletions(-)

diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
index 1c0035601c4f..4541f8ec5d62 100644
--- a/drivers/dma-buf/dma-buf.c
+++ b/drivers/dma-buf/dma-buf.c
@@ -571,24 +571,22 @@ static long dma_buf_ioctl(struct file *file,
 	}
 }
 
-static void dma_buf_show_fdinfo(struct seq_file *s, struct file *f)
+static void dma_buf_show_fdinfo(struct seq_file *s, struct file *file)
 {
-    struct dma_buf *dmabuf = f->private_data;
+	struct dma_buf *dmabuf;
 
-    if (!dmabuf)
-        return;
+	dmabuf = file->private_data;
+	if (!dmabuf)
+		return;
 
-    seq_printf(s, "flags:\t%lu\n", f->f_flags);
-    seq_printf(s, "size:\t%llu\n", dmabuf->size);
-    seq_printf(s, "count:\t%ld\n", file_count(dmabuf->file) - 1);
-    seq_printf(s, "attachments:\t%d\n", atomic_read(&dmabuf->num_attachments));
-    seq_printf(s, "mappings:\t%d\n", atomic_read(&dmabuf->num_mappings));
-    seq_printf(s, "exp_name:\t%s\n", dmabuf->exp_name ? dmabuf->exp_name : "N/A");
+	seq_printf(s, "size:\t%zu\n", dmabuf->size);
+	seq_printf(s, "count:\t%ld\n", file_count(dmabuf->file) - 1);
+	seq_printf(s, "exp_name:\t%s\n", dmabuf->exp_name ? dmabuf->exp_name : "N/A");
 
-    spin_lock(&dmabuf->name_lock);
-    if (dmabuf->name)
-        seq_printf(s, "name:\t%s\n", dmabuf->name);
-    spin_unlock(&dmabuf->name_lock);
+	spin_lock(&dmabuf->name_lock);
+	if (dmabuf->name)
+		seq_printf(s, "name:\t%s\n", dmabuf->name);
+	spin_unlock(&dmabuf->name_lock);
 }
 
 
-- 
2.43.0


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