linux-kernel - [PATCH 6/9] x86: use sizeof(long) to unify signal

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Date:	Fri, 08 Feb 2008 12:10:00 -0800
From:	Harvey Harrison <harvey.harrison@...il.com>
To:	Ingo Molnar <mingo@...e.hu>, Roland McGrath <roland@...hat.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 6/9] x86: use sizeof(long) to unify signal_32|64.c

Use sizeof(long) instead of hardcoded 4 and 8 in offset subtraction.
Clean up small bracketing/trailing space while we're here.

Signed-off-by: Harvey Harrison <harvey.harrison@...il.com>
---
 arch/x86/kernel/signal_32.c |    5 +++--
 arch/x86/kernel/signal_64.c |    8 +++-----
 2 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/arch/x86/kernel/signal_32.c b/arch/x86/kernel/signal_32.c
index e93b219..cf6bedf 100644
--- a/arch/x86/kernel/signal_32.c
+++ b/arch/x86/kernel/signal_32.c
@@ -215,11 +215,12 @@ badframe:
 
 asmlinkage int sys_rt_sigreturn(unsigned long __unused)
 {
-	struct pt_regs *regs = (struct pt_regs *) &__unused;
-	struct rt_sigframe __user *frame = (struct rt_sigframe __user *)(regs->sp - 4);
+	struct pt_regs *regs = (struct pt_regs *)&__unused;
+	struct rt_sigframe __user *frame;
 	sigset_t set;
 	int ax;
 
+	frame = (struct rt_sigframe __user *)(regs->sp - sizeof(long));
 	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
 		goto badframe;
 	if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
diff --git a/arch/x86/kernel/signal_64.c b/arch/x86/kernel/signal_64.c
index dced99a..fb27473 100644
--- a/arch/x86/kernel/signal_64.c
+++ b/arch/x86/kernel/signal_64.c
@@ -134,13 +134,11 @@ asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
 	sigset_t set;
 	unsigned long ax;
 
-	frame = (struct rt_sigframe __user *)(regs->sp - 8);
-	if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) {
+	frame = (struct rt_sigframe __user *)(regs->sp - sizeof(long));
+	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
 		goto badframe;
-	} 
-	if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set))) { 
+	if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
 		goto badframe;
-	} 
 
 	sigdelsetmask(&set, ~_BLOCKABLE);
 	spin_lock_irq(&current->sighand->siglock);
-- 
1.5.4.1219.g65b9


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