Merge tag 'v3.3' into staging/for_v3.4

* tag 'v3.3': (1646 commits)
  Linux 3.3
  Don't limit non-nested epoll paths
  netfilter: ctnetlink: fix race between delete and timeout expiration
  ipv6: Don't dev_hold(dev) in ip6_mc_find_dev_rcu.
  nilfs2: fix NULL pointer dereference in nilfs_load_super_block()
  nilfs2: clamp ns_r_segments_percentage to [1, 99]
  afs: Remote abort can cause BUG in rxrpc code
  afs: Read of file returns EBADMSG
  C6X: remove dead code from entry.S
  wimax/i2400m: fix erroneous NETDEV_TX_BUSY use
  net/hyperv: fix erroneous NETDEV_TX_BUSY use
  net/usbnet: reserve headroom on rx skbs
  bnx2x: fix memory leak in bnx2x_init_firmware()
  bnx2x: fix a crash on corrupt firmware file
  sch_sfq: revert dont put new flow at the end of flows
  ipv6: fix icmp6_dst_alloc()
  MAINTAINERS: Add Serge as maintainer of capabilities
  drivers/video/backlight/s6e63m0.c: fix corruption storing gamma mode
  MAINTAINERS: add entry for exynos mipi display drivers
  MAINTAINERS: fix link to Gustavo Padovans tree
  ...

1 files changed, 26 insertions, 5 deletions

diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index ed5de58c340..9e60dbe9fd9 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -572,19 +572,36 @@ static int init_memory_block(struct memory_block **memory,
 }
 
 static int add_memory_section(int nid, struct mem_section *section,
+			struct memory_block **mem_p,
 			unsigned long state, enum mem_add_context context)
 {
-	struct memory_block *mem;
+	struct memory_block *mem = NULL;
+	int scn_nr = __section_nr(section);
 	int ret = 0;
 
 	mutex_lock(&mem_sysfs_mutex);
 
-	mem = find_memory_block(section);
+	if (context == BOOT) {
+		/* same memory block ? */
+		if (mem_p && *mem_p)
+			if (scn_nr >= (*mem_p)->start_section_nr &&
+			    scn_nr <= (*mem_p)->end_section_nr) {
+				mem = *mem_p;
+				kobject_get(&mem->dev.kobj);
+			}
+	} else
+		mem = find_memory_block(section);
+
 	if (mem) {
 		mem->section_count++;
 		kobject_put(&mem->dev.kobj);
-	} else
+	} else {
 		ret = init_memory_block(&mem, section, state);
+		/* store memory_block pointer for next loop */
+		if (!ret && context == BOOT)
+			if (mem_p)
+				*mem_p = mem;
+	}
 
 	if (!ret) {
 		if (context == HOTPLUG &&
@@ -627,7 +644,7 @@ int remove_memory_block(unsigned long node_id, struct mem_section *section,
  */
 int register_new_memory(int nid, struct mem_section *section)
 {
-	return add_memory_section(nid, section, MEM_OFFLINE, HOTPLUG);
+	return add_memory_section(nid, section, NULL, MEM_OFFLINE, HOTPLUG);
 }
 
 int unregister_memory_section(struct mem_section *section)
@@ -647,6 +664,7 @@ int __init memory_dev_init(void)
 	int ret;
 	int err;
 	unsigned long block_sz;
+	struct memory_block *mem = NULL;
 
 	ret = subsys_system_register(&memory_subsys, NULL);
 	if (ret)
@@ -662,7 +680,10 @@ int __init memory_dev_init(void)
 	for (i = 0; i < NR_MEM_SECTIONS; i++) {
 		if (!present_section_nr(i))
 			continue;
-		err = add_memory_section(0, __nr_to_section(i), MEM_ONLINE,
+		/* don't need to reuse memory_block if only one per block */
+		err = add_memory_section(0, __nr_to_section(i),
+				 (sections_per_block == 1) ? NULL : &mem,
+					 MEM_ONLINE,
 					 BOOT);
 		if (!ret)
 			ret = err;