memcg: only free spare array when readers are done

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / mm / vmalloc.c

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index d365724feb05206fc0b37c852f5859499f1cb6b3..d4565606cc96867a908b0881544e253f0c910bbf 100644 (file)
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -388,12 +388,12 @@ nocache:
                addr = ALIGN(first->va_end, align);
                if (addr < vstart)
                        goto nocache;
-               if (addr + size - 1 < addr)
+               if (addr + size < addr)
                        goto overflow;
 
        } else {
                addr = ALIGN(vstart, align);
-               if (addr + size - 1 < addr)
+               if (addr + size < addr)
                        goto overflow;
 
                n = vmap_area_root.rb_node;
@@ -420,7 +420,7 @@ nocache:
                if (addr + cached_hole_size < first->va_start)
                        cached_hole_size = first->va_start - addr;
                addr = ALIGN(first->va_end, align);
-               if (addr + size - 1 < addr)
+               if (addr + size < addr)
                        goto overflow;
 
                if (list_is_last(&first->list, &vmap_area_list))