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From:   Adrian Huang <adrianhuang0701@gmail.com>
To:     Andrew Morton <akpm@linux-foundation.org>
Cc:     linux-mm@kvack.org, linux-kernel@vger.kernel.org,
        Adrian Huang <adrianhuang0701@gmail.com>,
        Adrian Huang <ahuang12@lenovo.com>
Subject: [PATCH 1/1] mm: mmap: Remove unnecessary local variable
Date:   Tue, 22 Dec 2020 18:32:49 +0800
Message-Id: <20201222103249.30683-1-adrianhuang0701@gmail.com>
Precedence: bulk

From: Adrian Huang <ahuang12@lenovo.com>

The local variable 'retval' is assigned just for once in __do_sys_brk(),
and the function returns the value of the local variable right after
the assignment. Remove unnecessary assignment and local variable
declaration.

Signed-off-by: Adrian Huang <ahuang12@lenovo.com>
---
 mm/mmap.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/mm/mmap.c b/mm/mmap.c
index dc7206032387..482c0c0bbe06 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -189,7 +189,6 @@ static int do_brk_flags(unsigned long addr, unsigned long request, unsigned long
 		struct list_head *uf);
 SYSCALL_DEFINE1(brk, unsigned long, brk)
 {
-	unsigned long retval;
 	unsigned long newbrk, oldbrk, origbrk;
 	struct mm_struct *mm = current->mm;
 	struct vm_area_struct *next;
@@ -281,9 +280,8 @@ SYSCALL_DEFINE1(brk, unsigned long, brk)
 	return brk;
 
 out:
-	retval = origbrk;
 	mmap_write_unlock(mm);
-	return retval;
+	return origbrk;
 }
 
 static inline unsigned long vma_compute_gap(struct vm_area_struct *vma)
-- 
2.17.1