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mm/mmap.c: remove unnecessary local variable

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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>
This commit is contained in:
Adrian Huang 2021-02-24 12:04:29 -08:00 committed by Linus Torvalds
parent 96403bfe50
commit b7204006c8
1 changed files with 1 additions and 3 deletions
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4
mm/mmap.c
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@ -189,7 +189,6 @@ static int do_brk_flags(unsigned long addr, unsigned long request, unsigned long
struct list_head *uf); struct list_head *uf);
SYSCALL_DEFINE1(brk, unsigned long, brk) SYSCALL_DEFINE1(brk, unsigned long, brk)
{ {
unsigned long retval;
unsigned long newbrk, oldbrk, origbrk; unsigned long newbrk, oldbrk, origbrk;
struct mm_struct *mm = current->mm; struct mm_struct *mm = current->mm;
struct vm_area_struct *next; struct vm_area_struct *next;
@ -281,9 +280,8 @@ SYSCALL_DEFINE1(brk, unsigned long, brk)
return brk; return brk;
out: out:
retval = origbrk;
mmap_write_unlock(mm); mmap_write_unlock(mm);
return retval; return origbrk;
} }
static inline unsigned long vma_compute_gap(struct vm_area_struct *vma) static inline unsigned long vma_compute_gap(struct vm_area_struct *vma)