linux-kernel - [RFC PATCH 4/5] csky: ftrace: Drop duplicate implementation of arch_check_ftrace

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Date:   Wed,  9 Jun 2021 19:50:18 +0900
From:   Punit Agrawal <punitagrawal@...il.com>
To:     mhiramat@...nel.org, naveen.n.rao@...ux.ibm.com,
        anil.s.keshavamurthy@...el.com, davem@...emloft.net
Cc:     Punit Agrawal <punitagrawal@...il.com>,
        linux-kernel@...r.kernel.org, guoren@...nel.org,
        linux-csky@...r.kernel.org, Guo Ren <guoren@...ux.alibaba.com>
Subject: [RFC PATCH 4/5] csky: ftrace: Drop duplicate implementation of arch_check_ftrace_location()

The csky specific arch_check_ftrace_location() shadows a weak
implementation of the function in core code that offers the same
functionality but with additional error checking.

Drop the architecture specific function as a step towards further
cleanup in core code.

Signed-off-by: Punit Agrawal <punitagrawal@...il.com>
Cc: Guo Ren <guoren@...ux.alibaba.com>
---
 arch/csky/kernel/probes/ftrace.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/arch/csky/kernel/probes/ftrace.c b/arch/csky/kernel/probes/ftrace.c
index ef2bb9bd9605..b388228abbf2 100644
--- a/arch/csky/kernel/probes/ftrace.c
+++ b/arch/csky/kernel/probes/ftrace.c
@@ -2,13 +2,6 @@
 
 #include <linux/kprobes.h>
 
-int arch_check_ftrace_location(struct kprobe *p)
-{
-	if (ftrace_location((unsigned long)p->addr))
-		p->flags |= KPROBE_FLAG_FTRACE;
-	return 0;
-}
-
 /* Ftrace callback handler for kprobes -- called under preepmt disabled */
 void kprobe_ftrace_handler(unsigned long ip, unsigned long parent_ip,
 			   struct ftrace_ops *ops, struct ftrace_regs *fregs)
-- 
2.30.2