add wifi6 8852be driver

hc

2024-12-19 9370bb92b2d16684ee45cf24e879c93c509162da

 kernel/fs/d_path.c
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@@ -102,6 +102,8 @@
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 		if (dentry == vfsmnt->mnt_root || IS_ROOT(dentry)) {
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 			struct mount *parent = READ_ONCE(mnt->mnt_parent);
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+			struct mnt_namespace *mnt_ns;
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+
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 			/* Escaped? */
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 			if (dentry != vfsmnt->mnt_root) {
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 				bptr = *buffer;
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@@ -116,8 +118,12 @@
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 				vfsmnt = &mnt->mnt;
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 				continue;
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 			}
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-			if (!error)
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-				error = is_mounted(vfsmnt) ? 1 : 2;
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+			mnt_ns = READ_ONCE(mnt->mnt_ns);
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+			/* open-coded is_mounted() to use local mnt_ns */
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+			if (!IS_ERR_OR_NULL(mnt_ns) && !is_anon_ns(mnt_ns))
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+				error = 1;	// absolute root
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+			else
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+				error = 2;	// detached or not attached yet
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 			break;
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 		}
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 		parent = dentry->d_parent;
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@@ -316,7 +322,6 @@
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 		end = ERR_PTR(-ENAMETOOLONG);
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 	return end;
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 }
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-EXPORT_SYMBOL(simple_dname);
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 /*
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  * Write full pathname from the root of the filesystem into the buffer.