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authorVlastimil Babka <vbabka@suse.cz>2021-11-10 14:12:45 +0100
committerVlastimil Babka <vbabka@suse.cz>2022-01-06 12:26:53 +0100
commit9c01e9af171f13cf6573f404ecaf96dfa48233ab (patch)
tree1af8f4560e4f707a0587cd9febe0ac34605f3abd /mm/slab.h
parent662188c3a20eba75babc5a910a5f1b4278069f85 (diff)
mm/slub: Define struct slab fields for CONFIG_SLUB_CPU_PARTIAL only when enabled
The fields 'next' and 'slabs' are only used when CONFIG_SLUB_CPU_PARTIAL is enabled. We can put their definition to #ifdef to prevent accidental use when disabled. Currenlty show_slab_objects() and slabs_cpu_partial_show() contain code accessing the slabs field that's effectively dead with CONFIG_SLUB_CPU_PARTIAL=n through the wrappers slub_percpu_partial() and slub_percpu_partial_read_once(), but to prevent a compile error, we need to hide all this code behind #ifdef. Signed-off-by: Vlastimil Babka <vbabka@suse.cz> Reviewed-by: Hyeonggon Yoo <42.hyeyoo@gmail.com> Reviewed-by: Roman Gushchin <guro@fb.com> Tested-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Diffstat (limited to 'mm/slab.h')
-rw-r--r--mm/slab.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/slab.h b/mm/slab.h
index 495008f89bf6..f14e723b9e3c 100644
--- a/mm/slab.h
+++ b/mm/slab.h
@@ -25,10 +25,12 @@ struct slab {
union {
struct list_head slab_list;
struct rcu_head rcu_head;
+#ifdef CONFIG_SLUB_CPU_PARTIAL
struct {
struct slab *next;
int slabs; /* Nr of slabs left */
};
+#endif
};
struct kmem_cache *slab_cache;
/* Double-word boundary */