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__detach_mounts(): use guards

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Clean fit for guards use; guards can't be weaker due to umount_tree() calls.

Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2025-08-20 20:12:47 -04:00
parent 547af12dcd
commit 902e990467
1 changed files with 4 additions and 6 deletions
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10
fs/namespace.c
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@@ -2032,10 +2032,11 @@ void __detach_mounts(struct dentry *dentry)
struct pinned_mountpoint mp = {};
struct mount *mnt;
namespace_lock();
lock_mount_hash();
guard(namespace_excl)();
guard(mount_writer)();
if (!lookup_mountpoint(dentry, &mp))
goto out_unlock;
return;
event++;
while (mp.node.next) {
@@ -2047,9 +2048,6 @@ void __detach_mounts(struct dentry *dentry)
else umount_tree(mnt, UMOUNT_CONNECTED);
}
unpin_mountpoint(&mp);
out_unlock:
unlock_mount_hash();
namespace_unlock();
}
/*