kernel_5.10 no rt

hc

2023-12-11 6778948f9de86c3cfaf36725a7c87dcff9ba247f

 kernel/arch/arm/kernel/unwind.c
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@@ -1,21 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * arch/arm/kernel/unwind.c
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  *
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  * Copyright (C) 2008 ARM Limited
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- *
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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 version 2 as
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- * published by the Free Software Foundation.
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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
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- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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- *
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  *
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  * Stack unwinding support for ARM
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  *
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@@ -457,7 +444,7 @@
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 		ctrl.vrs[PC] = ctrl.vrs[LR];
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 	/* check for infinite loop */
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-	if (frame->pc == ctrl.vrs[PC])
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+	if (frame->pc == ctrl.vrs[PC] && frame->sp == ctrl.vrs[SP])
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 		return -URC_FAILURE;
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 	frame->fp = ctrl.vrs[FP];
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@@ -468,7 +455,8 @@
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 	return URC_OK;
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 }
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-void unwind_backtrace(struct pt_regs *regs, struct task_struct *tsk)
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+void unwind_backtrace(struct pt_regs *regs, struct task_struct *tsk,
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+		      const char *loglvl)
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 {
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 	struct stackframe frame;
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@@ -506,7 +494,7 @@
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 		urc = unwind_frame(&frame);
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 		if (urc < 0)
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 			break;
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-		dump_backtrace_entry(where, frame.pc, frame.sp - 4);
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+		dump_backtrace_entry(where, frame.pc, frame.sp - 4, loglvl);
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 	}
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 }
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