linux-kernel - [PATCH 1/2] riscv: ftrace: Fix the comments about the number of ftrace instruction

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Message-ID: <20220426015751.88582-1-lihuafei1@huawei.com>
Date:   Tue, 26 Apr 2022 09:57:50 +0800
From:   Li Huafei <lihuafei1@...wei.com>
To:     <guoren@...nel.org>, <mhiramat@...nel.org>, <palmer@...belt.com>
CC:     <rostedt@...dmis.org>, <mingo@...hat.com>,
        <paul.walmsley@...ive.com>, <aou@...s.berkeley.edu>,
        <naveen.n.rao@...ux.ibm.com>, <anil.s.keshavamurthy@...el.com>,
        <davem@...emloft.net>, <jszhang@...nel.org>,
        <peterz@...radead.org>, <liaochang1@...wei.com>, <me@...ki.ch>,
        <penberg@...nel.org>, <lihuafei1@...wei.com>,
        <linux-riscv@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/2] riscv: ftrace: Fix the comments about the number of ftrace instruction

When DYNAMIC_FTRACE is enabled, we put four instructions in front of the
function for ftrace use, not five.

Signed-off-by: Li Huafei <lihuafei1@...wei.com>
---
 arch/riscv/kernel/ftrace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/riscv/kernel/ftrace.c b/arch/riscv/kernel/ftrace.c
index 4716f4cdc038..63f457650fa4 100644
--- a/arch/riscv/kernel/ftrace.c
+++ b/arch/riscv/kernel/ftrace.c
@@ -73,7 +73,7 @@ static int __ftrace_modify_call(unsigned long hook_pos, unsigned long target,
 }
 
 /*
- * Put 5 instructions with 16 bytes at the front of function within
+ * Put 4 instructions with 16 bytes at the front of function within
  * patchable function entry nops' area.
  *
  * 0: REG_S  ra, -SZREG(sp)
-- 
2.17.1