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From:   Christoph Hellwig <hch@lst.de>
To:     Al Viro <viro@zeniv.linux.org.uk>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Stephen Rothwell <sfr@canb.auug.org.au>
Cc:     Luis Chamberlain <mcgrof@kernel.org>,
        Matthew Wilcox <willy@infradead.org>,
        Kees Cook <keescook@chromium.org>,
        Iurii Zaikin <yzaikin@google.com>,
        linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: [PATCH 17/23] proc: cleanup the compat vs no compat file ops
Date:   Tue,  7 Jul 2020 19:47:55 +0200
Message-Id: <20200707174801.4162712-18-hch@lst.de>
In-Reply-To: <20200707174801.4162712-1-hch@lst.de>
References: <20200707174801.4162712-1-hch@lst.de>
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Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Instead of providing a special no-compat version provide a special
compat version for operations with ->compat_ioctl.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/proc/inode.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index 016b1302cbabc0..93dd2045737504 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -572,9 +572,6 @@ static const struct file_operations proc_reg_file_ops = {
 	.write		= proc_reg_write,
 	.poll		= proc_reg_poll,
 	.unlocked_ioctl	= proc_reg_unlocked_ioctl,
-#ifdef CONFIG_COMPAT
-	.compat_ioctl	= proc_reg_compat_ioctl,
-#endif
 	.mmap		= proc_reg_mmap,
 	.get_unmapped_area = proc_reg_get_unmapped_area,
 	.open		= proc_reg_open,
@@ -582,12 +579,13 @@ static const struct file_operations proc_reg_file_ops = {
 };
 
 #ifdef CONFIG_COMPAT
-static const struct file_operations proc_reg_file_ops_no_compat = {
+static const struct file_operations proc_reg_file_ops_compat = {
 	.llseek		= proc_reg_llseek,
 	.read		= proc_reg_read,
 	.write		= proc_reg_write,
 	.poll		= proc_reg_poll,
 	.unlocked_ioctl	= proc_reg_unlocked_ioctl,
+	.compat_ioctl	= proc_reg_compat_ioctl,
 	.mmap		= proc_reg_mmap,
 	.get_unmapped_area = proc_reg_get_unmapped_area,
 	.open		= proc_reg_open,
@@ -646,8 +644,8 @@ struct inode *proc_get_inode(struct super_block *sb, struct proc_dir_entry *de)
 		inode->i_op = de->proc_iops;
 		inode->i_fop = &proc_reg_file_ops;
 #ifdef CONFIG_COMPAT
-		if (!de->proc_ops->proc_compat_ioctl)
-			inode->i_fop = &proc_reg_file_ops_no_compat;
+		if (de->proc_ops->proc_compat_ioctl)
+			inode->i_fop = &proc_reg_file_ops_compat;
 #endif
 	} else if (S_ISDIR(inode->i_mode)) {
 		inode->i_op = de->proc_iops;
-- 
2.26.2