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From:   Eric Van Hensbergen <ericvh@kernel.org>
Date:   Mon, 17 Jul 2023 16:29:00 +0000
Subject: [PATCH 1/3] fs/9p: remove unecessary and overrestrictive check
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Message-Id: <20230716-fixes-overly-restrictive-mmap-v1-1-0683b283b932@kernel.org>
References: <20230716-fixes-overly-restrictive-mmap-v1-0-0683b283b932@kernel.org>
In-Reply-To: <20230716-fixes-overly-restrictive-mmap-v1-0-0683b283b932@kernel.org>
To:     Latchesar Ionkov <lucho@ionkov.net>,
        Dominique Martinet <asmadeus@codewreck.org>,
        Christian Schoenebeck <linux_oss@crudebyte.com>
Cc:     v9fs@lists.linux.dev, linux-kernel@vger.kernel.org,
        kernel@pengutronix.de, Robert Schwebel <r.schwebel@pengutronix.de>,
        Eric Van Hensbergen <ericvh@kernel.org>
Precedence: bulk

This eliminates a check for shared that was overrestrictive and
duplicated a check in generic_file_readonly_mmap.

Signed-off-by: Eric Van Hensbergen <ericvh@kernel.org>
---
 fs/9p/vfs_file.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index 2996fb00387fa..bda3abd6646b8 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -506,8 +506,6 @@ v9fs_file_mmap(struct file *filp, struct vm_area_struct *vma)
 
 	if (!(v9ses->cache & CACHE_WRITEBACK)) {
 		p9_debug(P9_DEBUG_CACHE, "(no mmap mode)");
-		if (vma->vm_flags & VM_MAYSHARE)
-			return -ENODEV;
 		invalidate_inode_pages2(filp->f_mapping);
 		return generic_file_readonly_mmap(filp, vma);
 	}

-- 
2.39.2