ring: reduce scope of local variables

The local variable i is only used for loop control so define it in
the enqueue and dequeue blocks directly, rather than at the function
level.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Reviewed-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Acked-by: Olivier Matz <olivier.matz@6wind.com>

diff --git a/lib/librte_ring/rte_ring.h b/lib/librte_ring/rte_ring.h
index 2b6896b..07dc895 100644 (file)
--- a/lib/librte_ring/rte_ring.h
+++ b/lib/librte_ring/rte_ring.h
@@ -285,6 +285,7 @@ void rte_ring_dump(FILE *f, const struct rte_ring *r);
  * Placed here since identical code needed in both
  * single and multi producer enqueue functions */
 #define ENQUEUE_PTRS() do { \
+       unsigned int i; \
        const uint32_t size = r->size; \
        uint32_t idx = prod_head & mask; \
        if (likely(idx + n < size)) { \
@@ -311,6 +312,7 @@ void rte_ring_dump(FILE *f, const struct rte_ring *r);
  * Placed here since identical code needed in both
  * single and multi consumer dequeue functions */
 #define DEQUEUE_PTRS() do { \
+       unsigned int i; \
        uint32_t idx = cons_head & mask; \
        const uint32_t size = r->size; \
        if (likely(idx + n < size)) { \
@@ -361,7 +363,6 @@ __rte_ring_mp_do_enqueue(struct rte_ring *r, void * const *obj_table,
        uint32_t cons_tail, free_entries;
        const unsigned int max = n;
        int success;
-       unsigned int i;
        uint32_t mask = r->mask;
 
        /* move prod.head atomically */
@@ -431,7 +432,6 @@ __rte_ring_sp_do_enqueue(struct rte_ring *r, void * const *obj_table,
 {
        uint32_t prod_head, cons_tail;
        uint32_t prod_next, free_entries;
-       unsigned int i;
        uint32_t mask = r->mask;
 
        prod_head = r->prod.head;
@@ -495,7 +495,6 @@ __rte_ring_mc_do_dequeue(struct rte_ring *r, void **obj_table,
        uint32_t cons_next, entries;
        const unsigned max = n;
        int success;
-       unsigned int i;
        uint32_t mask = r->mask;
 
        /* move cons.head atomically */
@@ -566,7 +565,6 @@ __rte_ring_sc_do_dequeue(struct rte_ring *r, void **obj_table,
 {
        uint32_t cons_head, prod_tail;
        uint32_t cons_next, entries;
-       unsigned int i;
        uint32_t mask = r->mask;
 
        cons_head = r->cons.head;