linux-kernel - [PATCH] x86: kprobes remove fix

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Date:	Sun, 23 Dec 2007 19:28:37 -0800
From:	Harvey Harrison <harvey.harrison@...il.com>
To:	Ingo Molnar <mingo@...e.hu>, Masami Hiramatsu <mhiramat@...hat.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH] x86: kprobes remove fix_riprel #ifdef

Move #ifdef around function definiton into the function and
unconditionally return on X86_32.  Saves an ifdef from the
one callsite.

Signed-off-by: Harvey Harrison <harvey.harrison@...il.com>
---
Ingo, Masami, final leftovers from some unsent kprobes unification work.

Net reduction of one #ifdef section.

 arch/x86/kernel/kprobes.c |   11 +++++++----
 1 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kernel/kprobes.c b/arch/x86/kernel/kprobes.c
index b1804e4..1ac532e 100644
--- a/arch/x86/kernel/kprobes.c
+++ b/arch/x86/kernel/kprobes.c
@@ -263,15 +263,16 @@ static int __kprobes is_IF_modifier(kprobe_opcode_t *insn)
 	return 0;
 }
 
-#ifdef CONFIG_X86_64
 /*
  * Adjust the displacement if the instruction uses the %rip-relative
  * addressing mode.
  * If it does, Return the address of the 32-bit displacement word.
  * If not, return null.
+ * Only applicable to X86_64
  */
 static void __kprobes fix_riprel(struct kprobe *p)
 {
+#ifdef CONFIG_X86_64
 	u8 *insn = p->ainsn.insn;
 	s64 disp;
 	int need_modrm;
@@ -335,15 +336,17 @@ static void __kprobes fix_riprel(struct kprobe *p)
 			*(s32 *)insn = (s32) disp;
 		}
 	}
-}
+#else
+	return;
 #endif
+}
 
 static void __kprobes arch_copy_kprobe(struct kprobe *p)
 {
 	memcpy(p->ainsn.insn, p->addr, MAX_INSN_SIZE * sizeof(kprobe_opcode_t));
-#ifdef CONFIG_X86_64
+
 	fix_riprel(p);
-#endif
+
 	if (can_boost(p->addr))
 		p->ainsn.boostable = 0;
 	else
-- 
1.5.4.rc0.1143.g1a8a



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