mm: Replace cgroup_page bit spinlock
Bit spinlocks are not working on RT. Replace them.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/mm/page_cgroup.c b/mm/page_cgroup.c
index 6d757e3a..98caeee 100644
--- a/mm/page_cgroup.c
+++ b/mm/page_cgroup.c
@@ -13,6 +13,14 @@
static unsigned long total_usage;
+static void page_cgroup_lock_init(struct page_cgroup *pc, int nr_pages)
+{
+#ifdef CONFIG_PREEMPT_RT_BASE
+ for (; nr_pages; nr_pages--, pc++)
+ spin_lock_init(&pc->pcg_lock);
+#endif
+}
+
#if !defined(CONFIG_SPARSEMEM)
@@ -60,6 +68,7 @@
return -ENOMEM;
NODE_DATA(nid)->node_page_cgroup = base;
total_usage += table_size;
+ page_cgroup_lock_init(base, nr_pages);
return 0;
}
@@ -150,6 +159,8 @@
return -ENOMEM;
}
+ page_cgroup_lock_init(base, PAGES_PER_SECTION);
+
/*
* The passed "pfn" may not be aligned to SECTION. For the calculation
* we need to apply a mask.