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From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 25 Oct 2012 10:32:35 +0100
Subject: [PATCH 081/342] mm: Enable SLUB for RT
Origin: https://git.kernel.org/cgit/linux/kernel/git/rt/linux-stable-rt.git/commit?id=66a902f49030b2d9bfb39fe4f55b1896c93f213d
Avoid the memory allocation in IRQ section
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
[bigeasy: factor out everything except the kcalloc() workaorund ]
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
mm/slub.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/mm/slub.c b/mm/slub.c
index e9abe4aa5801..ae6ab2cb4fbf 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -3734,6 +3734,11 @@ static void list_slab_objects(struct kmem_cache *s, struct page *page,
const char *text)
{
#ifdef CONFIG_SLUB_DEBUG
+#ifdef CONFIG_PREEMPT_RT_BASE
+ /* XXX move out of irq-off section */
+ slab_err(s, page, text, s->name);
+#else
+
void *addr = page_address(page);
void *p;
unsigned long *map = kcalloc(BITS_TO_LONGS(page->objects),
@@ -3755,6 +3760,7 @@ static void list_slab_objects(struct kmem_cache *s, struct page *page,
slab_unlock(page);
kfree(map);
#endif
+#endif
}
/*
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