On Thu, 8 Apr 2010, Xiaotian Feng wrote: > diff --git a/include/linux/slab.h b/include/linux/slab.h > index 4884462..1a0625c 100644 > --- a/include/linux/slab.h > +++ b/include/linux/slab.h > @@ -267,7 +267,7 @@ static inline void *kmem_cache_alloc_node(struct kmem_cache *cachep, > * allocator where we care about the real place the memory allocation > * request comes from. > */ > -#if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_SLUB) > +#if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_SLUB) || defined(CONFIG_TRACING) > extern void *__kmalloc_track_caller(size_t, gfp_t, unsigned long); > #define kmalloc_track_caller(size, flags) \ > __kmalloc_track_caller(size, flags, _RET_IP_) > @@ -285,7 +285,7 @@ extern void *__kmalloc_track_caller(size_t, gfp_t, unsigned long); > * standard allocator where we care about the real place the memory > * allocation request comes from. > */ > -#if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_SLUB) > +#if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_SLUB) || defined(CONFIG_TRACING) > extern void *__kmalloc_node_track_caller(size_t, gfp_t, int, unsigned long); > #define kmalloc_node_track_caller(size, flags, node) \ > __kmalloc_node_track_caller(size, flags, node, \ This doesn't work if the underlying slab allocator doesn't define __kmalloc_node_track_caller() regardless of whether CONFIG_TRACING is enabled or not. SLOB, for example, never defines it, and that's why the conditional exists in the way it currently does. This is your patch with CONFIG_EMBEDDED && CONFIG_SLOB: mm/built-in.o: In function `__krealloc': (.text+0x1283c): undefined reference to `__kmalloc_track_caller' mm/built-in.o: In function `kmemdup': (.text+0x128b4): undefined reference to `__kmalloc_track_caller' mm/built-in.o: In function `kstrndup': (.text+0x128fc): undefined reference to `__kmalloc_track_caller' mm/built-in.o: In function `kstrdup': (.text+0x12943): undefined reference to `__kmalloc_track_caller' mm/built-in.o: In function `memdup_user': (.text+0x129f7): undefined reference to `__kmalloc_track_caller' drivers/built-in.o:(.text+0xc48a4): more undefined references to `__kmalloc_track_caller' follow net/built-in.o: In function `__alloc_skb': (.text+0x8dc6): undefined reference to `__kmalloc_node_track_caller' -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>