From: Anatoly Burakov <anatoly.burakov@intel.com>
Date: Wed, 11 Apr 2018 12:29:43 +0000 (+0100)
Subject: malloc: make free return resulting element
X-Git-Url: http://git.droids-corp.org/?p=dpdk.git;a=commitdiff_plain;h=883179b493d610fe8b4fb8f853dbd37e25903b33

malloc: make free return resulting element

This will be needed because we need to know how big is the
new empty space, to check whether we can free some pages as
a result.

Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
Tested-by: Santosh Shukla <santosh.shukla@caviumnetworks.com>
Tested-by: Hemant Agrawal <hemant.agrawal@nxp.com>
Tested-by: Gowrishankar Muthukrishnan <gowrishankar.m@linux.vnet.ibm.com>
---

diff --git a/lib/librte_eal/common/malloc_elem.c b/lib/librte_eal/common/malloc_elem.c
index 008f5a33af..c18f050f85 100644
--- a/lib/librte_eal/common/malloc_elem.c
+++ b/lib/librte_eal/common/malloc_elem.c
@@ -379,7 +379,7 @@ malloc_elem_join_adjacent_free(struct malloc_elem *elem)
  * blocks either immediately before or immediately after newly freed block
  * are also free, the blocks are merged together.
  */
-int
+struct malloc_elem *
 malloc_elem_free(struct malloc_elem *elem)
 {
 	void *ptr;
@@ -397,7 +397,7 @@ malloc_elem_free(struct malloc_elem *elem)
 
 	memset(ptr, 0, data_len);
 
-	return 0;
+	return elem;
 }
 
 /*
diff --git a/lib/librte_eal/common/malloc_elem.h b/lib/librte_eal/common/malloc_elem.h
index 46e2383ccb..9c1614c6f6 100644
--- a/lib/librte_eal/common/malloc_elem.h
+++ b/lib/librte_eal/common/malloc_elem.h
@@ -138,7 +138,7 @@ malloc_elem_alloc(struct malloc_elem *elem, size_t size,
  * blocks either immediately before or immediately after newly freed block
  * are also free, the blocks are merged together.
  */
-int
+struct malloc_elem *
 malloc_elem_free(struct malloc_elem *elem);
 
 struct malloc_elem *
diff --git a/lib/librte_eal/common/malloc_heap.c b/lib/librte_eal/common/malloc_heap.c
index 44538d7bee..a2c2e4c01f 100644
--- a/lib/librte_eal/common/malloc_heap.c
+++ b/lib/librte_eal/common/malloc_heap.c
@@ -145,7 +145,7 @@ int
 malloc_heap_free(struct malloc_elem *elem)
 {
 	struct malloc_heap *heap;
-	int ret;
+	struct malloc_elem *ret;
 
 	if (!malloc_elem_cookies_ok(elem) || elem->state != ELEM_BUSY)
 		return -1;
@@ -159,7 +159,7 @@ malloc_heap_free(struct malloc_elem *elem)
 
 	rte_spinlock_unlock(&(heap->lock));
 
-	return ret;
+	return ret != NULL ? 0 : -1;
 }
 
 int