linux-kernel - [PATCH 3/5] clocksource/drivers/timer-clint: Remove clint_time

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240325164021.3229-4-jszhang@kernel.org>
Date: Tue, 26 Mar 2024 00:40:19 +0800
From: Jisheng Zhang <jszhang@...nel.org>
To: Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>
Cc: linux-riscv@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 3/5] clocksource/drivers/timer-clint: Remove clint_time_val

The usage have been removed, so it's time to remove clint_time_val.

Signed-off-by: Jisheng Zhang <jszhang@...nel.org>
---
 arch/riscv/include/asm/clint.h    | 26 --------------------------
 drivers/clocksource/timer-clint.c | 17 -----------------
 2 files changed, 43 deletions(-)
 delete mode 100644 arch/riscv/include/asm/clint.h

diff --git a/arch/riscv/include/asm/clint.h b/arch/riscv/include/asm/clint.h
deleted file mode 100644
index 0789fd37b40a..000000000000
--- a/arch/riscv/include/asm/clint.h
+++ /dev/null
@@ -1,26 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Copyright (C) 2020 Google, Inc
- */
-
-#ifndef _ASM_RISCV_CLINT_H
-#define _ASM_RISCV_CLINT_H
-
-#include <linux/types.h>
-#include <asm/mmio.h>
-
-#ifdef CONFIG_RISCV_M_MODE
-/*
- * This lives in the CLINT driver, but is accessed directly by timex.h to avoid
- * any overhead when accessing the MMIO timer.
- *
- * The ISA defines mtime as a 64-bit memory-mapped register that increments at
- * a constant frequency, but it doesn't define some other constraints we depend
- * on (most notably ordering constraints, but also some simpler stuff like the
- * memory layout).  Thus, this is called "clint_time_val" instead of something
- * like "riscv_mtime", to signify that these non-ISA assumptions must hold.
- */
-extern u64 __iomem *clint_time_val;
-#endif
-
-#endif
diff --git a/drivers/clocksource/timer-clint.c b/drivers/clocksource/timer-clint.c
index 09fd292eb83d..56acaa93b6c3 100644
--- a/drivers/clocksource/timer-clint.c
+++ b/drivers/clocksource/timer-clint.c
@@ -24,10 +24,6 @@
 #include <linux/smp.h>
 #include <linux/timex.h>
 
-#ifndef CONFIG_RISCV_M_MODE
-#include <asm/clint.h>
-#endif
-
 #define CLINT_IPI_OFF		0
 #define CLINT_TIMER_CMP_OFF	0x4000
 #define CLINT_TIMER_VAL_OFF	0xbff8
@@ -40,11 +36,6 @@ static u64 __iomem *clint_timer_val;
 static unsigned long clint_timer_freq;
 static unsigned int clint_timer_irq;
 
-#ifdef CONFIG_RISCV_M_MODE
-u64 __iomem *clint_time_val;
-EXPORT_SYMBOL(clint_time_val);
-#endif
-
 #ifdef CONFIG_SMP
 static void clint_send_ipi(unsigned int cpu)
 {
@@ -217,14 +208,6 @@ static int __init clint_timer_init_dt(struct device_node *np)
 	clint_timer_val = base + CLINT_TIMER_VAL_OFF;
 	clint_timer_freq = riscv_timebase;
 
-#ifdef CONFIG_RISCV_M_MODE
-	/*
-	 * Yes, that's an odd naming scheme.  time_val is public, but hopefully
-	 * will die in favor of something cleaner.
-	 */
-	clint_time_val = clint_timer_val;
-#endif
-
 	pr_info("%pOFP: timer running at %ld Hz\n", np, clint_timer_freq);
 
 	rc = clocksource_register_hz(&clint_clocksource, clint_timer_freq);
-- 
2.43.0