linux-kernel - [PATCH] x86, um: fix GETREG/PUTREG macros

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Message-ID: <49773C2E.9090608@gmail.com>
Date:	Wed, 21 Jan 2009 16:15:58 +0100
From:	Roel Kluin <roel.kluin@...il.com>
To:	Jeff Dike <jdike@...toit.com>, lkml <linux-kernel@...r.kernel.org>
CC:	uml-devel <user-mode-linux-devel@...ts.sourceforge.net>
Subject: [PATCH] x86, um: fix GETREG/PUTREG macros

When these macros aren't called with regs, e.g. with foo
this will incorectly expand to foo->foo.gp[*]

Signed-off-by: Roel Kluin <roel.kluin@...il.com>
---
My other patch should probably as well have been sent to this list:
http://lkml.org/lkml/2009/1/21/203

diff --git a/arch/um/sys-x86_64/signal.c b/arch/um/sys-x86_64/signal.c
index 1a899a7..31d0e9c 100644
--- a/arch/um/sys-x86_64/signal.c
+++ b/arch/um/sys-x86_64/signal.c
@@ -49,8 +49,8 @@ static int copy_sc_from_user(struct pt_regs *regs,
 	struct user_i387_struct fp;
 	int err = 0;
 
-#define GETREG(regs, regno, sc, regname)				\
-	__get_user((regs)->regs.gp[(regno) / sizeof(unsigned long)],	\
+#define GETREG(_regs, regno, sc, regname)				\
+	__get_user((_regs)->regs.gp[(regno) / sizeof(unsigned long)],	\
 		   &(sc)->regname)
 
 	err |= GETREG(regs, R8, from, r8);
@@ -104,8 +104,8 @@ static int copy_sc_to_user(struct sigcontext __user *to,
 	err |= __put_user(0, &to->gs);
 	err |= __put_user(0, &to->fs);
 
-#define PUTREG(regs, regno, sc, regname)				\
-	__put_user((regs)->regs.gp[(regno) / sizeof(unsigned long)],	\
+#define PUTREG(_regs, regno, sc, regname)				\
+	__put_user((_regs)->regs.gp[(regno) / sizeof(unsigned long)],	\
 		   &(sc)->regname)
 
 	err |= PUTREG(regs, RDI, to, di);

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