mm/mmap.c: remove unnecessary local variable

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.

Link: https://lkml.kernel.org/r/20201222103249.30683-1-adrianhuang0701@gmail.com
Signed-off-by: Adrian Huang <ahuang12@lenovo.com>
Acked-by: Souptick Joarder <jrdr.linux@gmail.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/mmap.c b/mm/mmap.c
index 90673fe..3f28759 100644 (file)
--- 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 @@ success:
        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)