[PATCH 2/2] powerpc/signal: Add helper function to fetch quad word aligned pointer

[Anshuman Khandual <khandual@linux.vnet.ibm.com>]

This patch adds one helper function 'vmx_reserve_addr' which computes
quad word aligned pointer for vmx_reserve array element in sigcontext
structure making the code more readable.

Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
---
 arch/powerpc/kernel/signal_64.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/arch/powerpc/kernel/signal_64.c b/arch/powerpc/kernel/signal_64.c
index c7c24d2..e8762f5 100644
--- a/arch/powerpc/kernel/signal_64.c
+++ b/arch/powerpc/kernel/signal_64.c
@@ -73,6 +73,12 @@ static const char fmt32[] = KERN_INFO \
 static const char fmt64[] = KERN_INFO \
 	"%s[%d]: bad frame in %s: %016lx nip %016lx lr %016lx\n";
 
+static elf_vrreg_t __user *vmx_reserve_addr(struct sigcontext __user *sc)
+{
+		return (elf_vrreg_t __user *)
+			(((unsigned long)sc->vmx_reserve + 15) & ~0xful);
+}
+
 /*
  * Set up the sigcontext for the signal frame.
  */
@@ -90,7 +96,7 @@ static long setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
 	 * v_regs pointer or not
 	 */
 #ifdef CONFIG_ALTIVEC
-	elf_vrreg_t __user *v_regs = (elf_vrreg_t __user *)(((unsigned long)sc->vmx_reserve + 15) & ~0xful);
+	elf_vrreg_t __user *v_regs = vmx_reserve_addr(sc);
 #endif
 	unsigned long msr = regs->msr;
 	long err = 0;
@@ -181,10 +187,8 @@ static long setup_tm_sigcontexts(struct sigcontext __user *sc,
 	 * v_regs pointer or not.
 	 */
 #ifdef CONFIG_ALTIVEC
-	elf_vrreg_t __user *v_regs = (elf_vrreg_t __user *)
-		(((unsigned long)sc->vmx_reserve + 15) & ~0xful);
-	elf_vrreg_t __user *tm_v_regs = (elf_vrreg_t __user *)
-		(((unsigned long)tm_sc->vmx_reserve + 15) & ~0xful);
+	elf_vrreg_t __user *v_regs = vmx_reserve_addr(sc);
+	elf_vrreg_t __user *tm_v_regs = vmx_reserve_addr(tm_sc);
 #endif
 	unsigned long msr = regs->msr;
 	long err = 0;
-- 
2.1.0