diff options
Diffstat (limited to 'arch/arm64/kernel/time.c')
| -rw-r--r-- | arch/arm64/kernel/time.c | 48 |
1 files changed, 19 insertions, 29 deletions
diff --git a/arch/arm64/kernel/time.c b/arch/arm64/kernel/time.c index a4391280fba9..b5855eb7435d 100644 --- a/arch/arm64/kernel/time.c +++ b/arch/arm64/kernel/time.c @@ -1,21 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Based on arch/arm/kernel/time.c * * Copyright (C) 1991, 1992, 1995 Linus Torvalds * Modifications for ARM (C) 1994-2001 Russell King * Copyright (C) 2012 ARM Ltd. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * 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 <http://www.gnu.org/licenses/>. */ #include <linux/clockchips.h> @@ -29,38 +18,37 @@ #include <linux/timex.h> #include <linux/errno.h> #include <linux/profile.h> +#include <linux/stacktrace.h> #include <linux/syscore_ops.h> #include <linux/timer.h> #include <linux/irq.h> #include <linux/delay.h> #include <linux/clocksource.h> -#include <linux/clk-provider.h> +#include <linux/of_clk.h> #include <linux/acpi.h> #include <clocksource/arm_arch_timer.h> #include <asm/thread_info.h> -#include <asm/stacktrace.h> +#include <asm/paravirt.h> -unsigned long profile_pc(struct pt_regs *regs) +static bool profile_pc_cb(void *arg, unsigned long pc) { - struct stackframe frame; + unsigned long *prof_pc = arg; - if (!in_lock_functions(regs->pc)) - return regs->pc; + if (in_lock_functions(pc)) + return true; + *prof_pc = pc; + return false; +} - frame.fp = regs->regs[29]; - frame.pc = regs->pc; -#ifdef CONFIG_FUNCTION_GRAPH_TRACER - frame.graph = -1; /* no task info */ -#endif - do { - int ret = unwind_frame(NULL, &frame); - if (ret < 0) - return 0; - } while (in_lock_functions(frame.pc)); +unsigned long profile_pc(struct pt_regs *regs) +{ + unsigned long prof_pc = 0; - return frame.pc; + arch_stack_walk(profile_pc_cb, &prof_pc, current, regs); + + return prof_pc; } EXPORT_SYMBOL(profile_pc); @@ -79,4 +67,6 @@ void __init time_init(void) /* Calibrate the delay loop directly */ lpj_fine = arch_timer_rate / HZ; + + pv_time_init(); } |