linux-kernel - [PATCH v3 5/7] fs: remove no

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Message-Id: <20220629130702.954310-6-Jason@zx2c4.com>
Date:   Wed, 29 Jun 2022 15:07:00 +0200
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     linux-kernel@...r.kernel.org, viro@...iv.linux.org.uk
Cc:     "Jason A. Donenfeld" <Jason@...c4.com>
Subject: [PATCH v3 5/7] fs: remove no_llseek

Now that all callers of ->llseek are going through vfs_llseek(), we
don't gain anything by keeping no_llseek around. Nothing compares it or
calls it.

Signed-off-by: Jason A. Donenfeld <Jason@...c4.com>
---
 fs/read_write.c    | 17 +++--------------
 include/linux/fs.h |  1 -
 2 files changed, 3 insertions(+), 15 deletions(-)

diff --git a/fs/read_write.c b/fs/read_write.c
index b1b1cdfee9d3..69cd8d72d91e 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -227,12 +227,6 @@ loff_t noop_llseek(struct file *file, loff_t offset, int whence)
 }
 EXPORT_SYMBOL(noop_llseek);
 
-loff_t no_llseek(struct file *file, loff_t offset, int whence)
-{
-	return -ESPIPE;
-}
-EXPORT_SYMBOL(no_llseek);
-
 loff_t default_llseek(struct file *file, loff_t offset, int whence)
 {
 	struct inode *inode = file_inode(file);
@@ -290,14 +284,9 @@ EXPORT_SYMBOL(default_llseek);
 
 loff_t vfs_llseek(struct file *file, loff_t offset, int whence)
 {
-	loff_t (*fn)(struct file *, loff_t, int);
-
-	fn = no_llseek;
-	if (file->f_mode & FMODE_LSEEK) {
-		if (file->f_op->llseek)
-			fn = file->f_op->llseek;
-	}
-	return fn(file, offset, whence);
+	if (!(file->f_mode & FMODE_LSEEK) || !file->f_op->llseek)
+		return -ESPIPE;
+	return file->f_op->llseek(file, offset, whence);
 }
 EXPORT_SYMBOL(vfs_llseek);
 
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 9ad5e3520fae..0cb5a1706e1f 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -3022,7 +3022,6 @@ extern long do_splice_direct(struct file *in, loff_t *ppos, struct file *out,
 extern void
 file_ra_state_init(struct file_ra_state *ra, struct address_space *mapping);
 extern loff_t noop_llseek(struct file *file, loff_t offset, int whence);
-extern loff_t no_llseek(struct file *file, loff_t offset, int whence);
 extern loff_t vfs_setpos(struct file *file, loff_t offset, loff_t maxsize);
 extern loff_t generic_file_llseek(struct file *file, loff_t offset, int whence);
 extern loff_t generic_file_llseek_size(struct file *file, loff_t offset,
-- 
2.35.1