[mirror_ubuntu-artful-kernel.git] / arch / score / kernel / traps.c

/*
 * arch/score/kernel/traps.c
 *
 * Score Processor version.
 *
 * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
 *  Chen Liqin <liqin.chen@sunplusct.com>
 *  Lennox Wu <lennox.wu@sunplusct.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see the file COPYING, or write
 * to the Free Software Foundation, Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include <linux/extable.h>
#include <linux/sched/mm.h>
#include <linux/sched/signal.h>
#include <linux/sched/debug.h>
#include <linux/mm_types.h>

#include <asm/cacheflush.h>
#include <asm/irq.h>
#include <asm/irq_regs.h>
#include <linux/uaccess.h>

unsigned long exception_handlers[32];

/*
 * The architecture-independent show_stack generator
 */
void show_stack(struct task_struct *task, unsigned long *sp)
{
	int i;
	long stackdata;

	sp = sp ? sp : (unsigned long *)&sp;

	printk(KERN_NOTICE "Stack: ");
	i = 1;
	while ((long) sp & (PAGE_SIZE - 1)) {
		if (i && ((i % 8) == 0))
			printk(KERN_NOTICE "\n");
		if (i > 40) {
			printk(KERN_NOTICE " ...");
			break;
		}

		if (__get_user(stackdata, sp++)) {
			printk(KERN_NOTICE " (Bad stack address)");
			break;
		}

		printk(KERN_NOTICE " %08lx", stackdata);
		i++;
	}
	printk(KERN_NOTICE "\n");
}

static void show_trace(long *sp)
{
	int i;
	long addr;

	sp = sp ? sp : (long *) &sp;

	printk(KERN_NOTICE "Call Trace:  ");
	i = 1;
	while ((long) sp & (PAGE_SIZE - 1)) {
		if (__get_user(addr, sp++)) {
			if (i && ((i % 6) == 0))
				printk(KERN_NOTICE "\n");
			printk(KERN_NOTICE " (Bad stack address)\n");
			break;
		}

		if (kernel_text_address(addr)) {
			if (i && ((i % 6) == 0))
				printk(KERN_NOTICE "\n");
			if (i > 40) {
				printk(KERN_NOTICE " ...");
				break;
			}

			printk(KERN_NOTICE " [<%08lx>]", addr);
			i++;
		}
	}
	printk(KERN_NOTICE "\n");
}

static void show_code(unsigned int *pc)
{
	long i;

	printk(KERN_NOTICE "\nCode:");

	for (i = -3; i < 6; i++) {
		unsigned long insn;
		if (__get_user(insn, pc + i)) {
			printk(KERN_NOTICE " (Bad address in epc)\n");
			break;
		}
		printk(KERN_NOTICE "%c%08lx%c", (i ? ' ' : '<'),
			insn, (i ? ' ' : '>'));
	}
}

/*
 * FIXME: really the generic show_regs should take a const pointer argument.
 */
void show_regs(struct pt_regs *regs)
{
	show_regs_print_info(KERN_DEFAULT);

	printk("r0 : %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
		regs->regs[0], regs->regs[1], regs->regs[2], regs->regs[3],
		regs->regs[4], regs->regs[5], regs->regs[6], regs->regs[7]);
	printk("r8 : %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
		regs->regs[8], regs->regs[9], regs->regs[10], regs->regs[11],
		regs->regs[12], regs->regs[13], regs->regs[14], regs->regs[15]);
	printk("r16: %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
		regs->regs[16], regs->regs[17], regs->regs[18], regs->regs[19],
		regs->regs[20], regs->regs[21], regs->regs[22], regs->regs[23]);
	printk("r24: %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
		regs->regs[24], regs->regs[25], regs->regs[26], regs->regs[27],
		regs->regs[28], regs->regs[29], regs->regs[30], regs->regs[31]);

	printk("CEH : %08lx\n", regs->ceh);
	printk("CEL : %08lx\n", regs->cel);

	printk("EMA:%08lx, epc:%08lx %s\nPSR: %08lx\nECR:%08lx\nCondition : %08lx\n",
		regs->cp0_ema, regs->cp0_epc, print_tainted(), regs->cp0_psr,
		regs->cp0_ecr, regs->cp0_condition);
}

static void show_registers(struct pt_regs *regs)
{
	show_regs(regs);
	printk(KERN_NOTICE "Process %s (pid: %d, stackpage=%08lx)\n",
		current->comm, current->pid, (unsigned long) current);
	show_stack(current_thread_info()->task, (long *) regs->regs[0]);
	show_trace((long *) regs->regs[0]);
	show_code((unsigned int *) regs->cp0_epc);
	printk(KERN_NOTICE "\n");
}

void __die(const char *str, struct pt_regs *regs, const char *file,
	const char *func, unsigned long line)
{
	console_verbose();
	printk("%s", str);
	if (file && func)
		printk(" in %s:%s, line %ld", file, func, line);
	printk(":\n");
	show_registers(regs);
	do_exit(SIGSEGV);
}

void __die_if_kernel(const char *str, struct pt_regs *regs,
		const char *file, const char *func, unsigned long line)
{
	if (!user_mode(regs))
		__die(str, regs, file, func, line);
}

asmlinkage void do_adelinsn(struct pt_regs *regs)
{
	printk("do_ADE-linsn:ema:0x%08lx:epc:0x%08lx\n",
		 regs->cp0_ema, regs->cp0_epc);
	die_if_kernel("do_ade execution Exception\n", regs);
	force_sig(SIGBUS, current);
}

asmlinkage void do_adedata(struct pt_regs *regs)
{
	const struct exception_table_entry *fixup;
	fixup = search_exception_tables(regs->cp0_epc);
	if (fixup) {
		regs->cp0_epc = fixup->fixup;
		return;
	}
	printk("do_ADE-data:ema:0x%08lx:epc:0x%08lx\n",
		 regs->cp0_ema, regs->cp0_epc);
	die_if_kernel("do_ade execution Exception\n", regs);
	force_sig(SIGBUS, current);
}

asmlinkage void do_pel(struct pt_regs *regs)
{
	die_if_kernel("do_pel execution Exception", regs);
	force_sig(SIGFPE, current);
}

asmlinkage void do_cee(struct pt_regs *regs)
{
	die_if_kernel("do_cee execution Exception", regs);
	force_sig(SIGFPE, current);
}

asmlinkage void do_cpe(struct pt_regs *regs)
{
	die_if_kernel("do_cpe execution Exception", regs);
	force_sig(SIGFPE, current);
}

asmlinkage void do_be(struct pt_regs *regs)
{
	die_if_kernel("do_be execution Exception", regs);
	force_sig(SIGBUS, current);
}

asmlinkage void do_ov(struct pt_regs *regs)
{
	siginfo_t info;

	die_if_kernel("do_ov execution Exception", regs);

	info.si_code = FPE_INTOVF;
	info.si_signo = SIGFPE;
	info.si_errno = 0;
	info.si_addr = (void *)regs->cp0_epc;
	force_sig_info(SIGFPE, &info, current);
}

asmlinkage void do_tr(struct pt_regs *regs)
{
	die_if_kernel("do_tr execution Exception", regs);
	force_sig(SIGTRAP, current);
}

asmlinkage void do_ri(struct pt_regs *regs)
{
	unsigned long epc_insn;
	unsigned long epc = regs->cp0_epc;

	read_tsk_long(current, epc, &epc_insn);
	if (current->thread.single_step == 1) {
		if ((epc == current->thread.addr1) ||
		    (epc == current->thread.addr2)) {
			user_disable_single_step(current);
			force_sig(SIGTRAP, current);
			return;
		} else
			BUG();
	} else if ((epc_insn == BREAKPOINT32_INSN) ||
		   ((epc_insn & 0x0000FFFF) == 0x7002) ||
		   ((epc_insn & 0xFFFF0000) == 0x70020000)) {
			force_sig(SIGTRAP, current);
			return;
	} else {
		die_if_kernel("do_ri execution Exception", regs);
		force_sig(SIGILL, current);
	}
}

asmlinkage void do_ccu(struct pt_regs *regs)
{
	die_if_kernel("do_ccu execution Exception", regs);
	force_sig(SIGILL, current);
}

asmlinkage void do_reserved(struct pt_regs *regs)
{
	/*
	 * Game over - no way to handle this if it ever occurs.  Most probably
	 * caused by a new unknown cpu type or after another deadly
	 * hard/software error.
	 */
	die_if_kernel("do_reserved execution Exception", regs);
	show_regs(regs);
	panic("Caught reserved exception - should not happen.");
}

/*
 * NMI exception handler.
 */
void nmi_exception_handler(struct pt_regs *regs)
{
	die_if_kernel("nmi_exception_handler execution Exception", regs);
	die("NMI", regs);
}

/* Install CPU exception handler */
void *set_except_vector(int n, void *addr)
{
	unsigned long handler = (unsigned long) addr;
	unsigned long old_handler = exception_handlers[n];

	exception_handlers[n] = handler;
	return (void *)old_handler;
}

void __init trap_init(void)
{
	int i;

	pgd_current = (unsigned long)init_mm.pgd;
	/* DEBUG EXCEPTION */
	memcpy((void *)DEBUG_VECTOR_BASE_ADDR,
			&debug_exception_vector, DEBUG_VECTOR_SIZE);
	/* NMI EXCEPTION */
	memcpy((void *)GENERAL_VECTOR_BASE_ADDR,
			&general_exception_vector, GENERAL_VECTOR_SIZE);

	/*
	 * Initialise exception handlers
	 */
	for (i = 0; i <= 31; i++)
		set_except_vector(i, handle_reserved);

	set_except_vector(1, handle_nmi);
	set_except_vector(2, handle_adelinsn);
	set_except_vector(3, handle_tlb_refill);
	set_except_vector(4, handle_tlb_invaild);
	set_except_vector(5, handle_ibe);
	set_except_vector(6, handle_pel);
	set_except_vector(7, handle_sys);
	set_except_vector(8, handle_ccu);
	set_except_vector(9, handle_ri);
	set_except_vector(10, handle_tr);
	set_except_vector(11, handle_adedata);
	set_except_vector(12, handle_adedata);
	set_except_vector(13, handle_tlb_refill);
	set_except_vector(14, handle_tlb_invaild);
	set_except_vector(15, handle_mod);
	set_except_vector(16, handle_cee);
	set_except_vector(17, handle_cpe);
	set_except_vector(18, handle_dbe);
	flush_icache_range(DEBUG_VECTOR_BASE_ADDR, IRQ_VECTOR_BASE_ADDR);

	mmgrab(&init_mm);
	current->active_mm = &init_mm;
	cpu_cache_init();
}
Commit	Line	Data
6bc9a396 CL	1	/*
	2	* arch/score/kernel/traps.c
	3	*
	4	* Score Processor version.
	5	*
	6	* Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
	7	* Chen Liqin <liqin.chen@sunplusct.com>
	8	* Lennox Wu <lennox.wu@sunplusct.com>
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License as published by
	12	* the Free Software Foundation; either version 2 of the License, or
	13	* (at your option) any later version.
	14	*
	15	* This program is distributed in the hope that it will be useful,
	16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	18	* GNU General Public License for more details.
	19	*
	20	* You should have received a copy of the GNU General Public License
	21	* along with this program; if not, see the file COPYING, or write
	22	* to the Free Software Foundation, Inc.,
	23	* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	24	*/
	25
0f296af8	26	#include <linux/extable.h>
68e21be2	27	#include <linux/sched/mm.h>
3f07c014	28	#include <linux/sched/signal.h>
b17b0153	29	#include <linux/sched/debug.h>
589ee628	30	#include <linux/mm_types.h>
6bc9a396 CL	31
	32	#include <asm/cacheflush.h>
	33	#include <asm/irq.h>
	34	#include <asm/irq_regs.h>
7c0f6ba6	35	#include <linux/uaccess.h>
6bc9a396 CL	36
	37	unsigned long exception_handlers[32];
	38
	39	/*
	40	* The architecture-independent show_stack generator
	41	*/
	42	void show_stack(struct task_struct task, unsigned long sp)
	43	{
	44	int i;
	45	long stackdata;
	46
	47	sp = sp ? sp : (unsigned long *)&sp;
	48
	49	printk(KERN_NOTICE "Stack: ");
	50	i = 1;
	51	while ((long) sp & (PAGE_SIZE - 1)) {
	52	if (i && ((i % 8) == 0))
	53	printk(KERN_NOTICE "\n");
	54	if (i > 40) {
	55	printk(KERN_NOTICE " ...");
	56	break;
	57	}
	58
	59	if (__get_user(stackdata, sp++)) {
	60	printk(KERN_NOTICE " (Bad stack address)");
	61	break;
	62	}
	63
	64	printk(KERN_NOTICE " %08lx", stackdata);
	65	i++;
	66	}
	67	printk(KERN_NOTICE "\n");
	68	}
	69
	70	static void show_trace(long *sp)
	71	{
	72	int i;
	73	long addr;
	74
	75	sp = sp ? sp : (long *) &sp;
	76
	77	printk(KERN_NOTICE "Call Trace: ");
	78	i = 1;
	79	while ((long) sp & (PAGE_SIZE - 1)) {
	80	if (__get_user(addr, sp++)) {
	81	if (i && ((i % 6) == 0))
	82	printk(KERN_NOTICE "\n");
	83	printk(KERN_NOTICE " (Bad stack address)\n");
	84	break;
	85	}
	86
	87	if (kernel_text_address(addr)) {
	88	if (i && ((i % 6) == 0))
	89	printk(KERN_NOTICE "\n");
	90	if (i > 40) {
	91	printk(KERN_NOTICE " ...");
	92	break;
	93	}
	94
	95	printk(KERN_NOTICE " [<%08lx>]", addr);
	96	i++;
	97	}
	98	}
	99	printk(KERN_NOTICE "\n");
100	}
101
102	static void show_code(unsigned int *pc)
103	{
104	long i;
105
106	printk(KERN_NOTICE "\nCode:");
107
108	for (i = -3; i < 6; i++) {
109	unsigned long insn;
110	if (__get_user(insn, pc + i)) {
111	printk(KERN_NOTICE " (Bad address in epc)\n");
112	break;
113	}
114	printk(KERN_NOTICE "%c%08lx%c", (i ? ' ' : '<'),
115	insn, (i ? ' ' : '>'));
116	}
117	}
118
119	/*
120	* FIXME: really the generic show_regs should take a const pointer argument.
121	*/
122	void show_regs(struct pt_regs *regs)
123	{
a43cb95d TH	124	show_regs_print_info(KERN_DEFAULT);
a43cb95d TH	125
6bc9a396 CL	126	printk("r0 : %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
	127	regs->regs[0], regs->regs[1], regs->regs[2], regs->regs[3],
	128	regs->regs[4], regs->regs[5], regs->regs[6], regs->regs[7]);
	129	printk("r8 : %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
	130	regs->regs[8], regs->regs[9], regs->regs[10], regs->regs[11],
	131	regs->regs[12], regs->regs[13], regs->regs[14], regs->regs[15]);
	132	printk("r16: %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
	133	regs->regs[16], regs->regs[17], regs->regs[18], regs->regs[19],
	134	regs->regs[20], regs->regs[21], regs->regs[22], regs->regs[23]);
	135	printk("r24: %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
	136	regs->regs[24], regs->regs[25], regs->regs[26], regs->regs[27],
	137	regs->regs[28], regs->regs[29], regs->regs[30], regs->regs[31]);
	138
	139	printk("CEH : %08lx\n", regs->ceh);
	140	printk("CEL : %08lx\n", regs->cel);
	141
	142	printk("EMA:%08lx, epc:%08lx %s\nPSR: %08lx\nECR:%08lx\nCondition : %08lx\n",
	143	regs->cp0_ema, regs->cp0_epc, print_tainted(), regs->cp0_psr,
	144	regs->cp0_ecr, regs->cp0_condition);
	145	}
	146
	147	static void show_registers(struct pt_regs *regs)
	148	{
	149	show_regs(regs);
	150	printk(KERN_NOTICE "Process %s (pid: %d, stackpage=%08lx)\n",
	151	current->comm, current->pid, (unsigned long) current);
	152	show_stack(current_thread_info()->task, (long *) regs->regs[0]);
	153	show_trace((long *) regs->regs[0]);
	154	show_code((unsigned int *) regs->cp0_epc);
	155	printk(KERN_NOTICE "\n");
	156	}
	157
6bc9a396 CL	158	void __die(const char str, struct pt_regs regs, const char *file,
	159	const char *func, unsigned long line)
	160	{
	161	console_verbose();
	162	printk("%s", str);
	163	if (file && func)
	164	printk(" in %s:%s, line %ld", file, func, line);
	165	printk(":\n");
	166	show_registers(regs);
	167	do_exit(SIGSEGV);
	168	}
	169
	170	void __die_if_kernel(const char str, struct pt_regs regs,
	171	const char file, const char func, unsigned long line)
	172	{
	173	if (!user_mode(regs))
	174	__die(str, regs, file, func, line);
	175	}
	176
	177	asmlinkage void do_adelinsn(struct pt_regs *regs)
	178	{
	179	printk("do_ADE-linsn:ema:0x%08lx:epc:0x%08lx\n",
	180	regs->cp0_ema, regs->cp0_epc);
	181	die_if_kernel("do_ade execution Exception\n", regs);
	182	force_sig(SIGBUS, current);
	183	}
	184
	185	asmlinkage void do_adedata(struct pt_regs *regs)
	186	{
	187	const struct exception_table_entry *fixup;
	188	fixup = search_exception_tables(regs->cp0_epc);
	189	if (fixup) {
	190	regs->cp0_epc = fixup->fixup;
	191	return;
	192	}
	193	printk("do_ADE-data:ema:0x%08lx:epc:0x%08lx\n",
	194	regs->cp0_ema, regs->cp0_epc);
	195	die_if_kernel("do_ade execution Exception\n", regs);
	196	force_sig(SIGBUS, current);
	197	}
	198
	199	asmlinkage void do_pel(struct pt_regs *regs)
	200	{
	201	die_if_kernel("do_pel execution Exception", regs);
	202	force_sig(SIGFPE, current);
	203	}
	204
	205	asmlinkage void do_cee(struct pt_regs *regs)
	206	{
	207	die_if_kernel("do_cee execution Exception", regs);
	208	force_sig(SIGFPE, current);
	209	}
	210
	211	asmlinkage void do_cpe(struct pt_regs *regs)
	212	{
	213	die_if_kernel("do_cpe execution Exception", regs);
	214	force_sig(SIGFPE, current);
	215	}
	216
	217	asmlinkage void do_be(struct pt_regs *regs)
	218	{
	219	die_if_kernel("do_be execution Exception", regs);
	220	force_sig(SIGBUS, current);
	221	}
222
223	asmlinkage void do_ov(struct pt_regs *regs)
224	{
225	siginfo_t info;
226
227	die_if_kernel("do_ov execution Exception", regs);
228
229	info.si_code = FPE_INTOVF;
230	info.si_signo = SIGFPE;
231	info.si_errno = 0;
232	info.si_addr = (void *)regs->cp0_epc;
233	force_sig_info(SIGFPE, &info, current);
234	}
235
236	asmlinkage void do_tr(struct pt_regs *regs)
237	{
238	die_if_kernel("do_tr execution Exception", regs);
239	force_sig(SIGTRAP, current);
240	}
241
242	asmlinkage void do_ri(struct pt_regs *regs)
243	{
244	unsigned long epc_insn;
245	unsigned long epc = regs->cp0_epc;
246
247	read_tsk_long(current, epc, &epc_insn);
248	if (current->thread.single_step == 1) {
249	if ((epc == current->thread.addr1) \|\|
250	(epc == current->thread.addr2)) {
0402c91a	251	user_disable_single_step(current);
6bc9a396 CL	252	force_sig(SIGTRAP, current);
	253	return;
	254	} else
	255	BUG();
	256	} else if ((epc_insn == BREAKPOINT32_INSN) \|\|
	257	((epc_insn & 0x0000FFFF) == 0x7002) \|\|
	258	((epc_insn & 0xFFFF0000) == 0x70020000)) {
	259	force_sig(SIGTRAP, current);
	260	return;
	261	} else {
	262	die_if_kernel("do_ri execution Exception", regs);
	263	force_sig(SIGILL, current);
	264	}
	265	}
	266
	267	asmlinkage void do_ccu(struct pt_regs *regs)
	268	{
	269	die_if_kernel("do_ccu execution Exception", regs);
	270	force_sig(SIGILL, current);
	271	}
	272
	273	asmlinkage void do_reserved(struct pt_regs *regs)
	274	{
	275	/*
	276	* Game over - no way to handle this if it ever occurs. Most probably
	277	* caused by a new unknown cpu type or after another deadly
	278	* hard/software error.
	279	*/
	280	die_if_kernel("do_reserved execution Exception", regs);
	281	show_regs(regs);
	282	panic("Caught reserved exception - should not happen.");
	283	}
	284
	285	/*
	286	* NMI exception handler.
	287	*/
	288	void nmi_exception_handler(struct pt_regs *regs)
	289	{
	290	die_if_kernel("nmi_exception_handler execution Exception", regs);
	291	die("NMI", regs);
	292	}
	293
	294	/* Install CPU exception handler */
	295	void set_except_vector(int n, void addr)
	296	{
	297	unsigned long handler = (unsigned long) addr;
	298	unsigned long old_handler = exception_handlers[n];
	299
	300	exception_handlers[n] = handler;
	301	return (void *)old_handler;
	302	}
	303
	304	void __init trap_init(void)
	305	{
	306	int i;
	307
	308	pgd_current = (unsigned long)init_mm.pgd;
	309	/* DEBUG EXCEPTION */
	310	memcpy((void *)DEBUG_VECTOR_BASE_ADDR,
	311	&debug_exception_vector, DEBUG_VECTOR_SIZE);
	312	/* NMI EXCEPTION */
	313	memcpy((void *)GENERAL_VECTOR_BASE_ADDR,
	314	&general_exception_vector, GENERAL_VECTOR_SIZE);
	315
316	/*
317	* Initialise exception handlers
318	*/
319	for (i = 0; i <= 31; i++)
320	set_except_vector(i, handle_reserved);
321
322	set_except_vector(1, handle_nmi);
323	set_except_vector(2, handle_adelinsn);
324	set_except_vector(3, handle_tlb_refill);
325	set_except_vector(4, handle_tlb_invaild);
326	set_except_vector(5, handle_ibe);
327	set_except_vector(6, handle_pel);
328	set_except_vector(7, handle_sys);
329	set_except_vector(8, handle_ccu);
330	set_except_vector(9, handle_ri);
331	set_except_vector(10, handle_tr);
332	set_except_vector(11, handle_adedata);
333	set_except_vector(12, handle_adedata);
334	set_except_vector(13, handle_tlb_refill);
335	set_except_vector(14, handle_tlb_invaild);
336	set_except_vector(15, handle_mod);
337	set_except_vector(16, handle_cee);
338	set_except_vector(17, handle_cpe);
339	set_except_vector(18, handle_dbe);
340	flush_icache_range(DEBUG_VECTOR_BASE_ADDR, IRQ_VECTOR_BASE_ADDR);
341
f1f10076	342	mmgrab(&init_mm);
6bc9a396 CL	343	current->active_mm = &init_mm;
	344	cpu_cache_init();
	345	}