linux-kernel - [PATCH] dma-buf: add the name field to the table header

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Date:   Thu, 28 Apr 2022 06:39:24 +0000
From:   Yuanzheng Song <songyuanzheng@...wei.com>
To:     <sumit.semwal@...aro.org>, <christian.koenig@....com>,
        <dri-devel@...ts.freedesktop.org>, <linaro-mm-sig@...ts.linaro.org>
CC:     <linux-media@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Yuanzheng Song <songyuanzheng@...wei.com>
Subject: [PATCH] dma-buf: add the name field to the table header

'cat /sys/kernel/debug/dma_buf/bufinfo' will print the Dma-buf
Objects' information when the CONFIG_DEBUG_FS=y.
However, the printed table header information does not contain
the name field. So we need to add the name field to the table
header and use the '<none>' to replace the empty buf_obj->name.

Signed-off-by: Yuanzheng Song <songyuanzheng@...wei.com>
---
 drivers/dma-buf/dma-buf.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
index 79795857be3e..a2f9a1815e38 100644
--- a/drivers/dma-buf/dma-buf.c
+++ b/drivers/dma-buf/dma-buf.c
@@ -1351,7 +1351,7 @@ static int dma_buf_debug_show(struct seq_file *s, void *unused)
 		return ret;
 
 	seq_puts(s, "\nDma-buf Objects:\n");
-	seq_printf(s, "%-8s\t%-8s\t%-8s\t%-8s\texp_name\t%-8s\n",
+	seq_printf(s, "%-8s\t%-8s\t%-8s\t%-8s\texp_name\t%-8s\tname\n",
 		   "size", "flags", "mode", "count", "ino");
 
 	list_for_each_entry(buf_obj, &db_list.head, list_node) {
@@ -1368,7 +1368,7 @@ static int dma_buf_debug_show(struct seq_file *s, void *unused)
 				file_count(buf_obj->file),
 				buf_obj->exp_name,
 				file_inode(buf_obj->file)->i_ino,
-				buf_obj->name ?: "");
+				buf_obj->name ?: "<none>");
 		spin_unlock(&buf_obj->name_lock);
 
 		dma_resv_describe(buf_obj->resv, s);
-- 
2.25.1