[PATCH v2 17/17] mm/slab: avoid returning values by reference

[js1304]

From: Joonsoo Kim <iamjoonsoo....@lge.com>

Returing values by reference is bad practice. Instead, just use
function return value.

Suggested-by: Christoph Lameter <c...@linux.com>
Signed-off-by: Joonsoo Kim <iamjoonsoo....@lge.com>
---
 mm/slab.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/mm/slab.c b/mm/slab.c
index 85e394f..4f4e647 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -460,9 +460,10 @@ static inline struct array_cache *cpu_cache_get(struct 
kmem_cache *cachep)
 /*
  * Calculate the number of objects and left-over bytes for a given buffer size.
  */
-static void cache_estimate(unsigned long gfporder, size_t buffer_size,
-               unsigned long flags, size_t *left_over, unsigned int *num)
+static unsigned int cache_estimate(unsigned long gfporder, size_t buffer_size,
+               unsigned long flags, size_t *left_over)
 {
+       unsigned int num;
        size_t slab_size = PAGE_SIZE << gfporder;
 
        /*
@@ -483,13 +484,15 @@ static void cache_estimate(unsigned long gfporder, size_t 
buffer_size,
         * correct alignment when allocated.
         */
        if (flags & (CFLGS_OBJFREELIST_SLAB | CFLGS_OFF_SLAB)) {
-               *num = slab_size / buffer_size;
+               num = slab_size / buffer_size;
                *left_over = slab_size % buffer_size;
        } else {
-               *num = slab_size / (buffer_size + sizeof(freelist_idx_t));
+               num = slab_size / (buffer_size + sizeof(freelist_idx_t));
                *left_over = slab_size %
                        (buffer_size + sizeof(freelist_idx_t));
        }
+
+       return num;
 }
 
 #if DEBUG
@@ -1893,7 +1896,7 @@ static size_t calculate_slab_order(struct kmem_cache 
*cachep,
                unsigned int num;
                size_t remainder;
 
-               cache_estimate(gfporder, size, flags, &remainder, &num);
+               num = cache_estimate(gfporder, size, flags, &remainder);
                if (!num)
                        continue;
 
-- 
1.9.1