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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c 
 kernel/arch/parisc/kernel/process.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
23  *    PARISC Architecture-dependent parts of process handling
34  *    based on the work for i386
....@@ -15,21 +16,6 @@
1516  *    Copyright (C) 2001-2002 Ryan Bradetich <rbrad at parisc-linux.org>
1617  *    Copyright (C) 2001-2014 Helge Deller <deller@gmx.de>
1718  *    Copyright (C) 2002 Randolph Chung <tausq with parisc-linux.org>
18
- *
19
- *
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- *    This program is free software; you can redistribute it and/or modify
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- *    it under the terms of the GNU General Public License as published by
22
- *    the Free Software Foundation; either version 2 of the License, or
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- *    (at your option) any later version.
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- *
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- *    This program is distributed in the hope that it will be useful,
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- *    but WITHOUT ANY WARRANTY; without even the implied warranty of
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- *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- *    GNU General Public License for more details.
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- *
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- *    You should have received a copy of the GNU General Public License
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- *    along with this program; if not, write to the Free Software
32
- *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
3319  */
3420 
3521 #include <stdarg.h>
....@@ -61,7 +47,6 @@
6147 #include <asm/assembly.h>
6248 #include <asm/pdc.h>
6349 #include <asm/pdc_chassis.h>
64
-#include <asm/pgalloc.h>
6550 #include <asm/unwind.h>
6651 #include <asm/sections.h>
6752 
....@@ -167,32 +152,13 @@
167152 }
168153 
169154 /*
170
- * Fill in the FPU structure for a core dump.
171
- */
172
-
173
-int dump_fpu (struct pt_regs * regs, elf_fpregset_t *r)
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-{
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-	if (regs == NULL)
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-		return 0;
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-
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-	memcpy(r, regs->fr, sizeof *r);
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-	return 1;
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-}
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-
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-int dump_task_fpu (struct task_struct *tsk, elf_fpregset_t *r)
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-{
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-	memcpy(r, tsk->thread.regs.fr, sizeof(*r));
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-	return 1;
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-}
187
-
188
-/*
189155  * Idle thread support
190156  *
191157  * Detect when running on QEMU with SeaBIOS PDC Firmware and let
192158  * QEMU idle the host too.
193159  */
194160 
195
-int running_on_qemu __read_mostly;
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+int running_on_qemu __ro_after_init;
196162 EXPORT_SYMBOL(running_on_qemu);
197163 
198164 void __cpuidle arch_cpu_idle_dead(void)
....@@ -203,7 +169,7 @@
203169 
204170 void __cpuidle arch_cpu_idle(void)
205171 {
206
-	local_irq_enable();
172
+	raw_local_irq_enable();
207173 
208174 	/* nop on real hardware, qemu will idle sleep. */
209175 	asm volatile("or %%r10,%%r10,%%r10\n":::);
....@@ -223,7 +189,7 @@
223189  */
224190 int
225191 copy_thread(unsigned long clone_flags, unsigned long usp,
226
-	    unsigned long kthread_arg, struct task_struct *p)
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+	    unsigned long kthread_arg, struct task_struct *p, unsigned long tls)
227193 {
228194 	struct pt_regs *cregs = &(p->thread.regs);
229195 	void *stack = task_stack_page(p);
....@@ -234,7 +200,7 @@
234200 	extern void * const ret_from_kernel_thread;
235201 	extern void * const child_return;
236202 
237
-	if (unlikely(p->flags & PF_KTHREAD)) {
203
+	if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) {
238204 		/* kernel thread */
239205 		memset(cregs, 0, sizeof(struct pt_regs));
240206 		if (!usp) /* idle thread */
....@@ -268,9 +234,9 @@
268234 		cregs->ksp = (unsigned long)stack + THREAD_SZ_ALGN + FRAME_SIZE;
269235 		cregs->kpc = (unsigned long) &child_return;
270236 
271
-		/* Setup thread TLS area from the 4th parameter in clone */
237
+		/* Setup thread TLS area */
272238 		if (clone_flags & CLONE_SETTLS)
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-			cregs->cr27 = cregs->gr[23];
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+			cregs->cr27 = tls;
274240 	}
275241 
276242 	return 0;
....@@ -307,7 +273,7 @@
307273 	Elf64_Fdesc *desc = ptr;
308274 	void *p;
309275 
310
-	if (!probe_kernel_address(&desc->addr, p))
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+	if (!get_kernel_nofault(p, (void *)&desc->addr))
311277 		ptr = p;
312278 	return ptr;
313279 }