lib: use C99 syntax for zero-size arrays

[dpdk.git] / lib / librte_sched / rte_bitmap.h

diff --git a/lib/librte_sched/rte_bitmap.h b/lib/librte_sched/rte_bitmap.h
index ea4a5f8..1b5df02 100644 (file)
--- a/lib/librte_sched/rte_bitmap.h
+++ b/lib/librte_sched/rte_bitmap.h
@@ -45,11 +45,11 @@ extern "C" {
  * The bitmap component provides a mechanism to manage large arrays of bits
  * through bit get/set/clear and bit array scan operations.
  *
- * The bitmap scan operation is optimized for 64-bit CPUs using 64-byte cache
+ * The bitmap scan operation is optimized for 64-bit CPUs using 64/128 byte cache
  * lines. The bitmap is hierarchically organized using two arrays (array1 and
  * array2), with each bit in array1 being associated with a full cache line
- * (512 bits) of bitmap bits, which are stored in array2: the bit in array1 is
- * set only when there is at least one bit set within its associated array2
+ * (512/1024 bits) of bitmap bits, which are stored in array2: the bit in array1
+ * is set only when there is at least one bit set within its associated array2
  * bits, otherwise the bit in array1 is cleared. The read and write operations
  * for array1 and array2 are always done in slabs of 64 bits.
  *
@@ -81,11 +81,11 @@ extern "C" {
 
 /* Cache line (CL) */
 #define RTE_BITMAP_CL_BIT_SIZE                   (RTE_CACHE_LINE_SIZE * 8)
-#define RTE_BITMAP_CL_BIT_SIZE_LOG2              9
+#define RTE_BITMAP_CL_BIT_SIZE_LOG2              (RTE_CACHE_LINE_SIZE_LOG2 + 3)
 #define RTE_BITMAP_CL_BIT_MASK                   (RTE_BITMAP_CL_BIT_SIZE - 1)
 
 #define RTE_BITMAP_CL_SLAB_SIZE                  (RTE_BITMAP_CL_BIT_SIZE / RTE_BITMAP_SLAB_BIT_SIZE)
-#define RTE_BITMAP_CL_SLAB_SIZE_LOG2             3
+#define RTE_BITMAP_CL_SLAB_SIZE_LOG2             (RTE_BITMAP_CL_BIT_SIZE_LOG2 - RTE_BITMAP_SLAB_BIT_SIZE_LOG2)
 #define RTE_BITMAP_CL_SLAB_MASK                  (RTE_BITMAP_CL_SLAB_SIZE - 1)
 
 /** Bitmap data structure */
@@ -103,7 +103,7 @@ struct rte_bitmap {
        uint32_t go2;     /**< Bitmap scan: Go/stop condition for current array2 cache line */
 
        /* Storage space for array1 and array2 */
-       uint8_t memory[0];
+       uint8_t memory[];
 };
 
 static inline void