linux-kernel - [PATCH] fuse: dev: avoid a build warning when PROC

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Message-ID: <20250514213243.3685364-1-rdunlap@infradead.org>
Date: Wed, 14 May 2025 14:32:43 -0700
From: Randy Dunlap <rdunlap@...radead.org>
To: linux-kernel@...r.kernel.org
Cc: Randy Dunlap <rdunlap@...radead.org>,
	Miklos Szeredi <miklos@...redi.hu>,
	Miklos Szeredi <mszeredi@...hat.com>,
	linux-fsdevel@...r.kernel.org,
	Chen Linxuan <chenlinxuan@...ontech.com>
Subject: [PATCH] fuse: dev: avoid a build warning when PROC_FS is not set

Fix a build warning when CONFIG_PROC_FS is not set by surrounding the
function with #ifdef CONFIG_PROC_FS.

fs/fuse/dev.c:2620:13: warning: 'fuse_dev_show_fdinfo' defined but not used [-Wunused-function]
 2620 | static void fuse_dev_show_fdinfo(struct seq_file *seq, struct file *file)

Fixes: 514d9210bf45 ("fs: fuse: add dev id to /dev/fuse fdinfo")
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Cc: Miklos Szeredi <miklos@...redi.hu>
Cc: Miklos Szeredi <mszeredi@...hat.com>
Cc: linux-fsdevel@...r.kernel.org
Cc: Chen Linxuan <chenlinxuan@...ontech.com>
---
 fs/fuse/dev.c |    2 ++
 1 file changed, 2 insertions(+)

--- linux-next-20250514.orig/fs/fuse/dev.c
+++ linux-next-20250514/fs/fuse/dev.c
@@ -2617,6 +2617,7 @@ static long fuse_dev_ioctl(struct file *
 	}
 }
 
+#ifdef CONFIG_PROC_FS
 static void fuse_dev_show_fdinfo(struct seq_file *seq, struct file *file)
 {
 	struct fuse_dev *fud = fuse_get_dev(file);
@@ -2625,6 +2626,7 @@ static void fuse_dev_show_fdinfo(struct
 
 	seq_printf(seq, "fuse_connection:\t%u\n", fud->fc->dev);
 }
+#endif
 
 const struct file_operations fuse_dev_operations = {
 	.owner		= THIS_MODULE,