linux-kernel - [PATCH] kgdb: clear compilation warning

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Message-Id: <1336849343-2701-1-git-send-email-trbecker@trbecker.org>
Date:	Sat, 12 May 2012 16:02:23 -0300
From:	Thiago Rafael Becker <trbecker@...ecker.org>
To:	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Cc:	Thiago Rafael Becker <trbecker@...ecker.org>, tglx@...utronix.de,
	mingo@...hat.com, hpa@...or.com, x86@...nel.org,
	a.p.zijlstra@...llo.nl, jason.wessel@...driver.com,
	jan.kiszka@...mens.com, dhowells@...hat.com
Subject: [PATCH] kgdb: clear compilation warning

In the function kgdb_arch_set_breakpoint, the variable is only used
if DEBUG_RODATA is configured. This clears the following compilation
warning:

arch/x86/kernel/kgdb.c:749:7: warning: unused variable 'opc'

Signed-off-by: Thiago Rafael Becker <trbecker@...ecker.org>
---
 arch/x86/kernel/kgdb.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/kernel/kgdb.c b/arch/x86/kernel/kgdb.c
index 8bfb614..0ea80ef 100644
--- a/arch/x86/kernel/kgdb.c
+++ b/arch/x86/kernel/kgdb.c
@@ -746,7 +746,9 @@ void kgdb_arch_set_pc(struct pt_regs *regs, unsigned long ip)
 int kgdb_arch_set_breakpoint(struct kgdb_bkpt *bpt)
 {
 	int err;
+#ifdef CONFIG_DEBUG_RODATA
 	char opc[BREAK_INSTR_SIZE];
+#endif
 
 	bpt->type = BP_BREAKPOINT;
 	err = probe_kernel_read(bpt->saved_instr, (char *)bpt->bpt_addr,
-- 
1.7.10.1

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