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authorMike Kravetz <kravetz@us.ibm.com>2006-05-15 09:44:13 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-05-15 11:20:56 -0700
commit39d24e64263cd3211705d3b61ea4171c65030921 (patch)
treeb527b1395b070180b7f930c0a89530f11bce7b3c
parent48564e628bd7662d7a0b3ac81c41cd0e4cc36dae (diff)
downloadlinux-39d24e64263cd3211705d3b61ea4171c65030921.tar.gz
[PATCH] add slab_is_available() routine for boot code
slab_is_available() indicates slab based allocators are available for use. SPARSEMEM code needs to know this as it can be called at various times during the boot process. Signed-off-by: Mike Kravetz <kravetz@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--include/linux/slab.h1
-rw-r--r--mm/slab.c8
-rw-r--r--mm/sparse.c2
3 files changed, 10 insertions, 1 deletions
diff --git a/include/linux/slab.h b/include/linux/slab.h
index 3af03b19c98..2d985d59c7b 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -150,6 +150,7 @@ static inline void *kcalloc(size_t n, size_t size, gfp_t flags)
extern void kfree(const void *);
extern unsigned int ksize(const void *);
+extern int slab_is_available(void);
#ifdef CONFIG_NUMA
extern void *kmem_cache_alloc_node(kmem_cache_t *, gfp_t flags, int node);
diff --git a/mm/slab.c b/mm/slab.c
index c32af7e7581..b1d643b5238 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -700,6 +700,14 @@ static enum {
FULL
} g_cpucache_up;
+/*
+ * used by boot code to determine if it can use slab based allocator
+ */
+int slab_is_available(void)
+{
+ return g_cpucache_up == FULL;
+}
+
static DEFINE_PER_CPU(struct work_struct, reap_work);
static void free_block(struct kmem_cache *cachep, void **objpp, int len,
diff --git a/mm/sparse.c b/mm/sparse.c
index d7c32de99ee..c5e89eb9ac8 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -32,7 +32,7 @@ static struct mem_section *sparse_index_alloc(int nid)
unsigned long array_size = SECTIONS_PER_ROOT *
sizeof(struct mem_section);
- if (system_state == SYSTEM_RUNNING)
+ if (slab_is_available())
section = kmalloc_node(array_size, GFP_KERNEL, nid);
else
section = alloc_bootmem_node(NODE_DATA(nid), array_size);