[PATCH] vmalloc.c: fix double error checking

["Figo.zhang" <figo1802@gmail.com>]

it is no need for double error checking.

Signed-off-by: Figo.zhang <figo1802@gmail.com>
--- 
mm/vmalloc.c |    9 ++-------
 1 files changed, 2 insertions(+), 7 deletions(-)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index f8189a4..56b2469 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -159,20 +159,15 @@ static int vmap_page_range_noflush(unsigned long start, unsigned long end,
 	pgd_t *pgd;
 	unsigned long next;
 	unsigned long addr = start;
-	int err = 0;
 	int nr = 0;
 
 	BUG_ON(addr >= end);
 	pgd = pgd_offset_k(addr);
 	do {
 		next = pgd_addr_end(addr, end);
-		err = vmap_pud_range(pgd, addr, next, prot, pages, &nr);
-		if (err)
-			break;
+		if (vmap_pud_range(pgd, addr, next, prot, pages, &nr))
+			return -ENOMEM;
 	} while (pgd++, addr = next, addr != end);
-
-	if (unlikely(err))
-		return err;
 	return nr;
 }