infrastructure to debug (dynamic) objects

[mirror_ubuntu-eoan-kernel.git] / mm / slab.c

diff --git a/mm/slab.c b/mm/slab.c
index 39d20f8a07916fc7bf77a8153d58c0cf8161c90e..919a995d1e680fe8a15f68caec57498d46fde4b8 100644 (file)
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -110,6 +110,7 @@
 #include       <linux/fault-inject.h>
 #include       <linux/rtmutex.h>
 #include       <linux/reciprocal_div.h>
+#include       <linux/debugobjects.h>
 
 #include       <asm/cacheflush.h>
 #include       <asm/tlbflush.h>
@@ -174,12 +175,14 @@
                         SLAB_CACHE_DMA | \
                         SLAB_STORE_USER | \
                         SLAB_RECLAIM_ACCOUNT | SLAB_PANIC | \
-                        SLAB_DESTROY_BY_RCU | SLAB_MEM_SPREAD)
+                        SLAB_DESTROY_BY_RCU | SLAB_MEM_SPREAD | \
+                        SLAB_DEBUG_OBJECTS)
 #else
 # define CREATE_MASK   (SLAB_HWCACHE_ALIGN | \
                         SLAB_CACHE_DMA | \
                         SLAB_RECLAIM_ACCOUNT | SLAB_PANIC | \
-                        SLAB_DESTROY_BY_RCU | SLAB_MEM_SPREAD)
+                        SLAB_DESTROY_BY_RCU | SLAB_MEM_SPREAD | \
+                        SLAB_DEBUG_OBJECTS)
 #endif
 
 /*
@@ -3760,6 +3763,8 @@ void kmem_cache_free(struct kmem_cache *cachep, void *objp)
 
        local_irq_save(flags);
        debug_check_no_locks_freed(objp, obj_size(cachep));
+       if (!(cachep->flags & SLAB_DEBUG_OBJECTS))
+               debug_check_no_obj_freed(objp, obj_size(cachep));
        __cache_free(cachep, objp);
        local_irq_restore(flags);
 }
@@ -3785,6 +3790,7 @@ void kfree(const void *objp)
        kfree_debugcheck(objp);
        c = virt_to_cache(objp);
        debug_check_no_locks_freed(objp, obj_size(c));
+       debug_check_no_obj_freed(objp, obj_size(c));
        __cache_free(c, (void *)objp);
        local_irq_restore(flags);
 }