linux-kernel - [PATCH v2 1/4] riscv: remove extra level wrappers of trace_hardirqs

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Message-Id: <20220928162007.3791-2-jszhang@kernel.org>
Date:   Thu, 29 Sep 2022 00:20:04 +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>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Guo Ren <guoren@...nel.org>
Cc:     linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        llvm@...ts.linux.dev
Subject: [PATCH v2 1/4] riscv: remove extra level wrappers of trace_hardirqs_{on,off}

Since riscv is converted to generic entry, there's no need for the
extra wrappers of trace_hardirqs_{on,off}.

Tested with llvm + irqsoff.

Signed-off-by: Jisheng Zhang <jszhang@...nel.org>
Reviewed-by: Guo Ren <guoren@...nel.org>
---
 arch/riscv/kernel/Makefile    |  2 --
 arch/riscv/kernel/trace_irq.c | 27 ---------------------------
 arch/riscv/kernel/trace_irq.h | 11 -----------
 3 files changed, 40 deletions(-)
 delete mode 100644 arch/riscv/kernel/trace_irq.c
 delete mode 100644 arch/riscv/kernel/trace_irq.h

diff --git a/arch/riscv/kernel/Makefile b/arch/riscv/kernel/Makefile
index 01da14e21019..11ee206cc235 100644
--- a/arch/riscv/kernel/Makefile
+++ b/arch/riscv/kernel/Makefile
@@ -69,8 +69,6 @@ obj-$(CONFIG_CPU_PM)		+= suspend_entry.o suspend.o
 obj-$(CONFIG_FUNCTION_TRACER)	+= mcount.o ftrace.o
 obj-$(CONFIG_DYNAMIC_FTRACE)	+= mcount-dyn.o
 
-obj-$(CONFIG_TRACE_IRQFLAGS)	+= trace_irq.o
-
 obj-$(CONFIG_PERF_EVENTS)	+= perf_callchain.o
 obj-$(CONFIG_HAVE_PERF_REGS)	+= perf_regs.o
 obj-$(CONFIG_RISCV_SBI)		+= sbi.o
diff --git a/arch/riscv/kernel/trace_irq.c b/arch/riscv/kernel/trace_irq.c
deleted file mode 100644
index 095ac976d7da..000000000000
--- a/arch/riscv/kernel/trace_irq.c
+++ /dev/null
@@ -1,27 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2022 Changbin Du <changbin.du@...il.com>
- */
-
-#include <linux/irqflags.h>
-#include <linux/kprobes.h>
-#include "trace_irq.h"
-
-/*
- * trace_hardirqs_on/off require the caller to setup frame pointer properly.
- * Otherwise, CALLER_ADDR1 might trigger an pagging exception in kernel.
- * Here we add one extra level so they can be safely called by low
- * level entry code which $fp is used for other purpose.
- */
-
-void __trace_hardirqs_on(void)
-{
-	trace_hardirqs_on();
-}
-NOKPROBE_SYMBOL(__trace_hardirqs_on);
-
-void __trace_hardirqs_off(void)
-{
-	trace_hardirqs_off();
-}
-NOKPROBE_SYMBOL(__trace_hardirqs_off);
diff --git a/arch/riscv/kernel/trace_irq.h b/arch/riscv/kernel/trace_irq.h
deleted file mode 100644
index 99fe67377e5e..000000000000
--- a/arch/riscv/kernel/trace_irq.h
+++ /dev/null
@@ -1,11 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Copyright (C) 2022 Changbin Du <changbin.du@...il.com>
- */
-#ifndef __TRACE_IRQ_H
-#define __TRACE_IRQ_H
-
-void __trace_hardirqs_on(void);
-void __trace_hardirqs_off(void);
-
-#endif /* __TRACE_IRQ_H */
-- 
2.34.1