add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/alpha/kernel/process.c
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@@ -37,7 +37,6 @@
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 #include <asm/reg.h>
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 #include <linux/uaccess.h>
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 #include <asm/io.h>
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-#include <asm/pgtable.h>
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 #include <asm/hwrpb.h>
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 #include <asm/fpu.h>
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@@ -58,7 +57,7 @@
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 void arch_cpu_idle(void)
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 {
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 	wtint(0);
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-	local_irq_enable();
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+	raw_local_irq_enable();
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 }
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 void arch_cpu_idle_dead(void)
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@@ -234,10 +233,9 @@
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 /*
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  * Copy architecture-specific thread state
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  */
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-int
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-copy_thread(unsigned long clone_flags, unsigned long usp,
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-	    unsigned long kthread_arg,
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-	    struct task_struct *p)
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+int copy_thread(unsigned long clone_flags, unsigned long usp,
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+		unsigned long kthread_arg, struct task_struct *p,
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+		unsigned long tls)
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 {
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 	extern void ret_from_fork(void);
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 	extern void ret_from_kernel_thread(void);
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@@ -251,7 +249,7 @@
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 	childti->pcb.ksp = (unsigned long) childstack;
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 	childti->pcb.flags = 1;	/* set FEN, clear everything else */
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-	if (unlikely(p->flags & PF_KTHREAD)) {
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+	if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) {
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 		/* kernel thread */
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 		memset(childstack, 0,
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 			sizeof(struct switch_stack) + sizeof(struct pt_regs));
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@@ -268,7 +266,7 @@
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 	   required for proper operation in the case of a threaded
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 	   application calling fork.  */
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 	if (clone_flags & CLONE_SETTLS)
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-		childti->pcb.unique = regs->r20;
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+		childti->pcb.unique = tls;
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 	else
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 		regs->r20 = 0;	/* OSF/1 has some strange fork() semantics.  */
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 	childti->pcb.usp = usp ?: rdusp();