cpumask: reduce stack usage in SD_x_INIT initializers

  * Remove empty cpumask_t (and all non-zero/non-null) variables
    in SD_*_INIT macros.  Use memset(0) to clear.  Also, don't
    inline the initializer functions to save on stack space in
    build_sched_domains().

  * Merge change to include/linux/topology.h that uses the new
    node_to_cpumask_ptr function in the nr_cpus_node macro into
    this patch.

Depends on:
	[mm-patch]: asm-generic-add-node_to_cpumask_ptr-macro.patch
	[sched-devel]: sched: add new set_cpus_allowed_ptr function

Cc: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 5 deletions

diff --git a/include/asm-x86/topology.h b/include/asm-x86/topology.h
index b167ca90f96f..9ef74c5d5ad6 100644
--- a/include/asm-x86/topology.h
+++ b/include/asm-x86/topology.h
@@ -154,10 +154,6 @@ extern unsigned long node_remap_size[];
 
 /* sched_domains SD_NODE_INIT for NUMAQ machines */
 #define SD_NODE_INIT (struct sched_domain) {            \
-        .span                   = CPU_MASK_NONE,        \
-        .parent                 = NULL,                 \
-        .child                  = NULL,                 \
-        .groups                 = NULL,                 \
         .min_interval           = 8,                    \
         .max_interval           = 32,                   \
         .busy_factor            = 32,                   \
@@ -175,7 +171,6 @@ extern unsigned long node_remap_size[];
                                 | SD_WAKE_BALANCE,      \
         .last_balance           = jiffies,              \
         .balance_interval       = 1,                    \
-        .nr_balance_failed      = 0,                    \
 }
 
 #ifdef CONFIG_X86_64_ACPI_NUMA