raw: deprecate the raw driver

The raw driver has been replaced by O_DIRECT support on the block device
in 2002.  Deprecate it to prepare for removal in a few kernel releases.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/char/raw.c b/drivers/char/raw.c
index 380bf51..ccf5bd5 100644 (file)
--- a/drivers/char/raw.c
+++ b/drivers/char/raw.c
@@ -63,6 +63,11 @@ static int raw_open(struct inode *inode, struct file *filp)
                return 0;
        }
 
+       pr_warn_ratelimited(
+               "process %s (pid %d) is using the deprecated raw device\n"
+               "support will be removed in Linux 5.14.\n",
+               current->comm, current->pid);
+
        mutex_lock(&raw_mutex);
 
        /*