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2023-11-07 5e8555e3ea324daaf0e38422bcba48c4df33a0d9

 kernel/fs/nfs/dir.c
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@@ -457,7 +457,7 @@
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 void nfs_prime_dcache(struct dentry *parent, struct nfs_entry *entry)
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 {
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 	struct qstr filename = QSTR_INIT(entry->name, entry->len);
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-	DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
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+	DECLARE_SWAIT_QUEUE_HEAD_ONSTACK(wq);
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 	struct dentry *dentry;
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 	struct dentry *alias;
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 	struct inode *dir = d_inode(parent);
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@@ -1520,7 +1520,7 @@
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 		    struct file *file, unsigned open_flags,
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 		    umode_t mode)
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 {
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-	DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
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+	DECLARE_SWAIT_QUEUE_HEAD_ONSTACK(wq);
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 	struct nfs_open_context *ctx;
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 	struct dentry *res;
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 	struct iattr attr = { .ia_valid = ATTR_OPEN };
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@@ -1858,7 +1858,11 @@
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 	trace_nfs_rmdir_enter(dir, dentry);
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 	if (d_really_is_positive(dentry)) {
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+#ifdef CONFIG_PREEMPT_RT_BASE
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+		down(&NFS_I(d_inode(dentry))->rmdir_sem);
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+#else
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 		down_write(&NFS_I(d_inode(dentry))->rmdir_sem);
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+#endif
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 		error = NFS_PROTO(dir)->rmdir(dir, &dentry->d_name);
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 		/* Ensure the VFS deletes this inode */
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 		switch (error) {
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@@ -1868,7 +1872,11 @@
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 		case -ENOENT:
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 			nfs_dentry_handle_enoent(dentry);
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 		}
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+#ifdef CONFIG_PREEMPT_RT_BASE
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+		up(&NFS_I(d_inode(dentry))->rmdir_sem);
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+#else
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 		up_write(&NFS_I(d_inode(dentry))->rmdir_sem);
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+#endif
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 	} else
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 		error = NFS_PROTO(dir)->rmdir(dir, &dentry->d_name);
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 	trace_nfs_rmdir_exit(dir, dentry, error);