修改led为gpio

hc

2024-10-12 a5969cabbb4660eab42b6ef0412cbbd1200cf14d

 kernel/arch/openrisc/kernel/process.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * OpenRISC process.c
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  *
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@@ -8,11 +9,6 @@
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  * Modifications for the OpenRISC architecture:
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  * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
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  * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
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- *
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- *      This program is free software; you can redistribute it and/or
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- *      modify it under the terms of the GNU General Public License
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- *      as published by the Free Software Foundation; either version
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- *      2 of the License, or (at your option) any later version.
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  *
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  * This file handles the architecture-dependent parts of process handling...
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  */
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@@ -40,7 +36,6 @@
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 #include <linux/fs.h>
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 #include <linux/uaccess.h>
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-#include <asm/pgtable.h>
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 #include <asm/io.h>
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 #include <asm/processor.h>
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 #include <asm/spr_defs.h>
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@@ -84,7 +79,7 @@
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  */
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 void arch_cpu_idle(void)
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 {
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-	local_irq_enable();
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+	raw_local_irq_enable();
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 	if (mfspr(SPR_UPR) & SPR_UPR_PMP)
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 		mtspr(SPR_PMR, mfspr(SPR_PMR) | SPR_PMR_DME);
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 }
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@@ -126,7 +121,7 @@
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  * @usp: user stack pointer or fn for kernel thread
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  * @arg: arg to fn for kernel thread; always NULL for userspace thread
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  * @p: the newly created task
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- * @regs: CPU context to copy for userspace thread; always NULL for kthread
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+ * @tls: the Thread Local Storage pointer for the new process
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  *
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  * At the top of a newly initialized kernel stack are two stacked pt_reg
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  * structures.  The first (topmost) is the userspace context of the thread.
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@@ -152,8 +147,8 @@
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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 arg, struct task_struct *p)
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+copy_thread(unsigned long clone_flags, unsigned long usp, unsigned long arg,
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+	    struct task_struct *p, unsigned long tls)
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 {
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 	struct pt_regs *userregs;
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 	struct pt_regs *kregs;
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@@ -172,7 +167,7 @@
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 	sp -= sizeof(struct pt_regs);
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 	kregs = (struct pt_regs *)sp;
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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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 		memset(kregs, 0, sizeof(struct pt_regs));
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 		kregs->gpr[20] = usp; /* fn, kernel thread */
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 		kregs->gpr[22] = arg;
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@@ -183,16 +178,10 @@
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 			userregs->sp = usp;
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 		/*
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-		 * For CLONE_SETTLS set "tp" (r10) to the TLS pointer passed to sys_clone.
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-		 *
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-		 * The kernel entry is:
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-		 *	int clone (long flags, void *child_stack, int *parent_tid,
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-		 *		int *child_tid, struct void *tls)
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-		 *
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-		 * This makes the source r7 in the kernel registers.
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+		 * For CLONE_SETTLS set "tp" (r10) to the TLS pointer.
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 		 */
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 		if (clone_flags & CLONE_SETTLS)
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-			userregs->gpr[10] = userregs->gpr[7];
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+			userregs->gpr[10] = tls;
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 		userregs->gpr[11] = 0;	/* Result from fork() */
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@@ -223,13 +212,6 @@
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 	regs->pc = pc;
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 	regs->sr = sr;
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 	regs->sp = sp;
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-}
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-
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-/* Fill in the fpu structure for a core dump.  */
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-int dump_fpu(struct pt_regs *regs, elf_fpregset_t * fpu)
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-{
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-	/* TODO */
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-	return 0;
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 }
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 extern struct thread_info *_switch(struct thread_info *old_ti,