mm, slub: only disable irq with spin_lock in __unfreeze_partials()

__unfreeze_partials() no longer needs to have irqs disabled, except for making
the spin_lock operations irq-safe, so convert the spin_locks operations and
remove the separate irq handling.

Signed-off-by: Vlastimil Babka <vbabka@suse.cz>

diff --git a/mm/slub.c b/mm/slub.c
index 9b46d9b..c5766e5 100644 (file)
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2352,9 +2352,7 @@ static void __unfreeze_partials(struct kmem_cache *s, struct page *partial_page)
 {
        struct kmem_cache_node *n = NULL, *n2 = NULL;
        struct page *page, *discard_page = NULL;
-       unsigned long flags;
-
-       local_irq_save(flags);
+       unsigned long flags = 0;
 
        while (partial_page) {
                struct page new;
@@ -2366,10 +2364,10 @@ static void __unfreeze_partials(struct kmem_cache *s, struct page *partial_page)
                n2 = get_node(s, page_to_nid(page));
                if (n != n2) {
                        if (n)
-                               spin_unlock(&n->list_lock);
+                               spin_unlock_irqrestore(&n->list_lock, flags);
 
                        n = n2;
-                       spin_lock(&n->list_lock);
+                       spin_lock_irqsave(&n->list_lock, flags);
                }
 
                do {
@@ -2398,9 +2396,7 @@ static void __unfreeze_partials(struct kmem_cache *s, struct page *partial_page)
        }
 
        if (n)
-               spin_unlock(&n->list_lock);
-
-       local_irq_restore(flags);
+               spin_unlock_irqrestore(&n->list_lock, flags);
 
        while (discard_page) {
                page = discard_page;