tracing, slab: Define kmem_cache_alloc_notrace ifdef CONFIG_TRACING

Define kmem_trace_alloc_{,node}_notrace() if CONFIG_TRACING is
enabled, otherwise perf-kmem will show wrong stats ifndef
CONFIG_KMEM_TRACE, because a kmalloc() memory allocation may
be traced by both trace_kmalloc() and trace_kmem_cache_alloc().

Signed-off-by: Li Zefan <[email protected]>
Reviewed-by: Pekka Enberg <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: [email protected] <[email protected]>
Cc: Eduard - Gabriel Munteanu <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>

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