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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/arch/x86/um/tls_32.c
..
..
@@ -65,9 +65,6 @@
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 	struct thread_struct *t = &task->thread;
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 	int idx;
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67
 
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-	if (!t->arch.tls_array)
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-		return GDT_ENTRY_TLS_MIN;
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-
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 	for (idx = 0; idx < GDT_ENTRY_TLS_ENTRIES; idx++)
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 		if (!t->arch.tls_array[idx].present)
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 			return idx + GDT_ENTRY_TLS_MIN;
..
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@@ -215,14 +212,12 @@
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 	return 0;
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 }
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-int arch_copy_tls(struct task_struct *new)
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+int arch_set_tls(struct task_struct *new, unsigned long tls)
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 {
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 	struct user_desc info;
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 	int idx, ret = -EFAULT;
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-	if (copy_from_user(&info,
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-			   (void __user *) UPT_SI(&new->thread.regs.regs),
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-			   sizeof(info)))
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+	if (copy_from_user(&info, (void __user *) tls, sizeof(info)))
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 		goto out;
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 	ret = -EINVAL;
..
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@@ -241,9 +236,6 @@
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 			 int idx)
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 {
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 	struct thread_struct *t = &task->thread;
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-
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-	if (!t->arch.tls_array)
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-		goto clear;
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 	if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX)
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 		return -EINVAL;