Conventionally, we put output param to the end of param list.
cma_declare_contiguous() doesn't look like that, so change it.

Additionally, move down cma_areas reference code to the position
where it is really needed.

Signed-off-by: Joonsoo Kim <iamjoonsoo....@lge.com>

diff --git a/arch/powerpc/kvm/book3s_hv_builtin.c 
b/arch/powerpc/kvm/book3s_hv_builtin.c
index 28ec226..97613ea 100644
--- a/arch/powerpc/kvm/book3s_hv_builtin.c
+++ b/arch/powerpc/kvm/book3s_hv_builtin.c
@@ -184,7 +184,7 @@ void __init kvm_cma_reserve(void)
 
                align_size = max(kvm_rma_pages << PAGE_SHIFT, align_size);
                cma_declare_contiguous(selected_size, 0, 0, align_size,
-                       KVM_CMA_CHUNK_ORDER - PAGE_SHIFT, &kvm_cma, false);
+                       KVM_CMA_CHUNK_ORDER - PAGE_SHIFT, false, &kvm_cma);
        }
 }
 
diff --git a/drivers/base/dma-contiguous.c b/drivers/base/dma-contiguous.c
index f177f73..bfd4553 100644
--- a/drivers/base/dma-contiguous.c
+++ b/drivers/base/dma-contiguous.c
@@ -149,7 +149,7 @@ int __init dma_contiguous_reserve_area(phys_addr_t size, 
phys_addr_t base,
 {
        int ret;
 
-       ret = cma_declare_contiguous(size, base, limit, 0, 0, res_cma, fixed);
+       ret = cma_declare_contiguous(size, base, limit, 0, 0, fixed, res_cma);
        if (ret)
                return ret;
 
diff --git a/include/linux/cma.h b/include/linux/cma.h
index e38efe9..e53eead 100644
--- a/include/linux/cma.h
+++ b/include/linux/cma.h
@@ -6,7 +6,7 @@ struct cma;
 extern int __init cma_declare_contiguous(phys_addr_t size,
                                phys_addr_t base, phys_addr_t limit,
                                phys_addr_t alignment, int order_per_bit,
-                               struct cma **res_cma, bool fixed);
+                               bool fixed, struct cma **res_cma);
 extern struct page *cma_alloc(struct cma *cma, int count, unsigned int align);
 extern bool cma_release(struct cma *cma, struct page *pages, int count);
 #endif
diff --git a/mm/cma.c b/mm/cma.c
index 01a0713..22a5b23 100644
--- a/mm/cma.c
+++ b/mm/cma.c
@@ -142,8 +142,8 @@ core_initcall(cma_init_reserved_areas);
  * @limit: End address of the reserved memory (optional, 0 for any).
  * @alignment: Alignment for the contiguous memory area, should be power of 2
  * @order_per_bit: Order of pages represented by one bit on bitmap.
- * @res_cma: Pointer to store the created cma region.
  * @fixed: hint about where to place the reserved area
+ * @res_cma: Pointer to store the created cma region.
  *
  * This function reserves memory from early allocator. It should be
  * called by arch specific code once the early allocator (memblock or bootmem)
@@ -156,9 +156,9 @@ core_initcall(cma_init_reserved_areas);
 int __init cma_declare_contiguous(phys_addr_t size,
                                phys_addr_t base, phys_addr_t limit,
                                phys_addr_t alignment, int order_per_bit,
-                               struct cma **res_cma, bool fixed)
+                               bool fixed, struct cma **res_cma)
 {
-       struct cma *cma = &cma_areas[cma_area_count];
+       struct cma *cma;
        int ret = 0;
 
        pr_debug("%s(size %lx, base %08lx, limit %08lx alignment %08lx)\n",
@@ -214,6 +214,7 @@ int __init cma_declare_contiguous(phys_addr_t size,
         * Each reserved area must be initialised later, when more kernel
         * subsystems (like slab allocator) are available.
         */
+       cma = &cma_areas[cma_area_count];
        cma->base_pfn = PFN_DOWN(base);
        cma->count = size >> PAGE_SHIFT;
        cma->order_per_bit = order_per_bit;
-- 
1.7.9.5

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