[PATCH net-next 2/8] bnx2x: use kzalloc() to allocate mac filtering list

[Mike Rapoport (Microsoft)]

bnx2x_mcast_enqueue_cmd() allocates memory for mac filtering list using
__get_free_pages().

This memory can be allocated with kzalloc() as there's nothing special
about it to go directly to the page allocator.

kmalloc() provides a better API that does not require ugly casts and
kfree() does not need to know the size of the freed object.

Performance difference between kmalloc() and __get_free_pages() is not
measurable as both allocators take an object/page from a per-CPU list for
fast path allocations.

For the slow path the performance is anyway determined by the amount of
reclaim involved rather than by what allocator is used.

Replace use of __get_free_page() with kzalloc() and free_page() with
kfree().

Link: https://lore.kernel.org/all/635405e4-9423-4a25-a6e7-e03c8ea0bcbe@xxxxxxxxxx
Signed-off-by: Mike Rapoport (Microsoft) <rppt@xxxxxxxxxx>
---
 drivers/net/ethernet/broadcom/bnx2x/bnx2x_sp.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sp.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sp.c
index 07a908a2c72f..d560524d317d 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sp.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sp.c
@@ -26,6 +26,7 @@
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
 #include <linux/crc32c.h>
+#include <linux/slab.h>
 #include "bnx2x.h"
 #include "bnx2x_cmn.h"
 #include "bnx2x_sp.h"
@@ -2664,7 +2665,7 @@ static void bnx2x_free_groups(struct list_head *mcast_group_list)
 				      struct bnx2x_mcast_elem_group,
 				      mcast_group_link);
 		list_del(&current_mcast_group->mcast_group_link);
-		free_page((unsigned long)current_mcast_group);
+		kfree(current_mcast_group);
 	}
 }
 
@@ -2713,8 +2714,7 @@ static int bnx2x_mcast_enqueue_cmd(struct bnx2x *bp,
 				total_elems = BNX2X_MCAST_BINS_NUM;
 		}
 		while (total_elems > 0) {
-			elem_group = (struct bnx2x_mcast_elem_group *)
-				     __get_free_page(GFP_ATOMIC | __GFP_ZERO);
+			elem_group = kzalloc(PAGE_SIZE, GFP_ATOMIC);
 			if (!elem_group) {
 				bnx2x_free_groups(&new_cmd->group_head);
 				kfree(new_cmd);

-- 
2.53.0