cpumask: only allocate nr_cpumask_bits.

Now we'll find out the hard way if anyone has CPUMASK_OFFSTACK and is
returning these or assigning them.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

1 files changed, 0 insertions, 7 deletions

diff --git a/lib/cpumask.c b/lib/cpumask.c
index b6513a9f2892..ba379d12bb57 100644
--- a/lib/cpumask.c
+++ b/lib/cpumask.c
@@ -89,13 +89,6 @@ bool alloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, int node)
                 dump_stack();
         }
 #endif
-        /* FIXME: Bandaid to save us from old primitives which go to NR_CPUS. */
-        if (*mask) {
-                unsigned char *ptr = (unsigned char *)cpumask_bits(*mask);
-                unsigned int tail;
-                tail = BITS_TO_LONGS(NR_CPUS - nr_cpumask_bits) * sizeof(long);
-                memset(ptr + cpumask_size() - tail, 0, tail);
-        }
 
         return *mask != NULL;
 }