ipc: define the slab_memory_callback priority as a constant
This is a trivial patch that defines the priority of slab_memory_callback in
the callback chain as a constant. This is to prepare for next patch in the
series.
Signed-off-by: Nadia Derbey <Nadia.Derbey@bull.net>
Cc: Yasunori Goto <y-goto@jp.fujitsu.com>
Cc: Matt Helsley <matthltc@us.ibm.com>
Cc: Mingming Cao <cmm@us.ibm.com>
Cc: Pierre Peiffer <pierre.peiffer@bull.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/memory.h b/include/linux/memory.h
index f80e0e3..39628df 100644
--- a/include/linux/memory.h
+++ b/include/linux/memory.h
@@ -53,6 +53,12 @@
struct notifier_block;
struct mem_section;
+/*
+ * Priorities for the hotplug memory callback routines (stored in decreasing
+ * order in the callback chain)
+ */
+#define SLAB_CALLBACK_PRI 1
+
#ifndef CONFIG_MEMORY_HOTPLUG_SPARSE
static inline int memory_dev_init(void)
{
diff --git a/mm/slub.c b/mm/slub.c
index 992ecd4..b145e79 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2978,7 +2978,7 @@
kmalloc_caches[0].refcount = -1;
caches++;
- hotplug_memory_notifier(slab_memory_callback, 1);
+ hotplug_memory_notifier(slab_memory_callback, SLAB_CALLBACK_PRI);
#endif
/* Able to allocate the per node structures */
