linux-kernel - [tip:perf/core] kprobes/x86: Remove addressof() operators

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Date:   Thu, 28 Sep 2017 03:52:09 -0700
From:   tip-bot for Masami Hiramatsu <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     peterz@...radead.org, mingo@...nel.org,
        torvalds@...ux-foundation.org, ananth@...ibm.com,
        mhiramat@...nel.org, davem@...emloft.net, tglx@...utronix.de,
        hpa@...or.com, linux-kernel@...r.kernel.org,
        anil.s.keshavamurthy@...el.com
Subject: [tip:perf/core] kprobes/x86: Remove addressof() operators

Commit-ID:  a8976fc84b644e3b567ea2bafad3b53b21ed6b6c
Gitweb:     https://git.kernel.org/tip/a8976fc84b644e3b567ea2bafad3b53b21ed6b6c
Author:     Masami Hiramatsu <mhiramat@...nel.org>
AuthorDate: Fri, 18 Aug 2017 17:25:08 +0900
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Thu, 28 Sep 2017 09:23:03 +0200

kprobes/x86: Remove addressof() operators

The following commit:

  54a7d50b9205 ("x86: mark kprobe templates as character arrays, not single characters")

changed optprobe_template_* to arrays, so we can remove the addressof()
operators from those symbols.

Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>
Cc: Ananth N Mavinakayanahalli <ananth@...ibm.com>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>
Cc: David S . Miller <davem@...emloft.net>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Link: http://lkml.kernel.org/r/150304469798.17009.15886717935027472863.stgit@devbox
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/include/asm/kprobes.h | 4 ++--
 arch/x86/kernel/kprobes/opt.c  | 8 ++++----
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/x86/include/asm/kprobes.h b/arch/x86/include/asm/kprobes.h
index 6cf6543..9f2e310 100644
--- a/arch/x86/include/asm/kprobes.h
+++ b/arch/x86/include/asm/kprobes.h
@@ -58,8 +58,8 @@ extern __visible kprobe_opcode_t optprobe_template_call[];
 extern __visible kprobe_opcode_t optprobe_template_end[];
 #define MAX_OPTIMIZED_LENGTH (MAX_INSN_SIZE + RELATIVE_ADDR_SIZE)
 #define MAX_OPTINSN_SIZE 				\
-	(((unsigned long)&optprobe_template_end -	\
-	  (unsigned long)&optprobe_template_entry) +	\
+	(((unsigned long)optprobe_template_end -	\
+	  (unsigned long)optprobe_template_entry) +	\
 	 MAX_OPTIMIZED_LENGTH + RELATIVEJUMP_SIZE)
 
 extern const int kretprobe_blacklist_size;
diff --git a/arch/x86/kernel/kprobes/opt.c b/arch/x86/kernel/kprobes/opt.c
index 22e65f0..0cae7c0 100644
--- a/arch/x86/kernel/kprobes/opt.c
+++ b/arch/x86/kernel/kprobes/opt.c
@@ -142,11 +142,11 @@ void optprobe_template_func(void);
 STACK_FRAME_NON_STANDARD(optprobe_template_func);
 
 #define TMPL_MOVE_IDX \
-	((long)&optprobe_template_val - (long)&optprobe_template_entry)
+	((long)optprobe_template_val - (long)optprobe_template_entry)
 #define TMPL_CALL_IDX \
-	((long)&optprobe_template_call - (long)&optprobe_template_entry)
+	((long)optprobe_template_call - (long)optprobe_template_entry)
 #define TMPL_END_IDX \
-	((long)&optprobe_template_end - (long)&optprobe_template_entry)
+	((long)optprobe_template_end - (long)optprobe_template_entry)
 
 #define INT3_SIZE sizeof(kprobe_opcode_t)
 
@@ -371,7 +371,7 @@ int arch_prepare_optimized_kprobe(struct optimized_kprobe *op,
 	}
 
 	/* Copy arch-dep-instance from template */
-	memcpy(buf, &optprobe_template_entry, TMPL_END_IDX);
+	memcpy(buf, optprobe_template_entry, TMPL_END_IDX);
 
 	/* Copy instructions into the out-of-line buffer */
 	ret = copy_optimized_instructions(buf + TMPL_END_IDX, op->kp.addr,