linux-kernel - [PATCH 3/3] AVR32: Return an error code only as a constant in sys

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Date:   Wed, 18 Jan 2017 14:50:05 +0100
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     Haavard Skinnemoen <hskinnemoen@...il.com>,
        Hans-Christian Egtvedt <egtvedt@...fundet.no>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH 3/3] AVR32: Return an error code only as a constant in
 sys_cacheflush()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Wed, 18 Jan 2017 14:30:11 +0100

* Return an error code without storing it in an intermediate variable.

* Delete the local variable "ret" which became unnecessary with
  this refactoring.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 arch/avr32/mm/cache.c | 21 +++++----------------
 1 file changed, 5 insertions(+), 16 deletions(-)

diff --git a/arch/avr32/mm/cache.c b/arch/avr32/mm/cache.c
index 85d635cd7b28..c893e5944390 100644
--- a/arch/avr32/mm/cache.c
+++ b/arch/avr32/mm/cache.c
@@ -126,30 +126,19 @@ void flush_icache_page(struct vm_area_struct *vma, struct page *page)
 
 asmlinkage int sys_cacheflush(int operation, void __user *addr, size_t len)
 {
-	int ret;
-
-	if (len > CACHEFLUSH_MAX_LEN) {
-		ret = -EPERM;
-		if (!capable(CAP_SYS_ADMIN))
-			goto out;
-	}
-
-	ret = -EFAULT;
+	if (len > CACHEFLUSH_MAX_LEN && !capable(CAP_SYS_ADMIN))
+		return -EPERM;
 	if (!access_ok(VERIFY_WRITE, addr, len))
-		goto out;
+		return -EFAULT;
 
 	switch (operation) {
 	case CACHE_IFLUSH:
 		flush_icache_range((unsigned long)addr,
 				   (unsigned long)addr + len);
-		ret = 0;
-		break;
+		return 0;
 	default:
-		ret = -EINVAL;
+		return -EINVAL;
 	}
-
-out:
-	return ret;
 }
 
 void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
-- 
2.11.0