perf, amd: Use kmalloc_node(,__GFP_ZERO) for northbridge structure allocation

Jasper suggested we use the zeroing capability of the allocators
instead of calling memset ourselves. Add node affinity while we're at
it.

Reported-by: Jesper Juhl <[email protected]>
Signed-off-by: Peter Zijlstra <[email protected]>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <[email protected]>

diff --git a/arch/x86/kernel/cpu/perf_event_amd.c b/arch/x86/kernel/cpu/perf_event_amd.c
index 46d58448c3aff9039fdf0b909d069d00d80ef75e..e421b8cd6944af860c4b28a1a176a14320ac9f79 100644 (file)
--- a/arch/x86/kernel/cpu/perf_event_amd.c
+++ b/arch/x86/kernel/cpu/perf_event_amd.c
@@ -280,11 +280,11 @@ static struct amd_nb *amd_alloc_nb(int cpu, int nb_id)
        struct amd_nb *nb;
        int i;
 
-       nb = kmalloc(sizeof(struct amd_nb), GFP_KERNEL);
+       nb = kmalloc_node(sizeof(struct amd_nb), GFP_KERNEL | __GFP_ZERO,
+                         cpu_to_node(cpu));
        if (!nb)
                return NULL;
 
-       memset(nb, 0, sizeof(*nb));
        nb->nb_id = nb_id;
 
        /*