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authorNathan Lynch <ntl@pobox.com>2008-07-27 15:24:52 +1000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2008-07-28 16:30:49 +1000
commite2075f79a99b45a6cc10de021c93f07212098a84 (patch)
tree8c3ccb423f706336741734d0758219028d765396 /arch/powerpc/kernel/setup-common.c
parent9ba1984ead5d25c93d241e0ee43f8f6a252f60d9 (diff)
powerpc: Update cpu_sibling_maps dynamically
Rather doing one initialization pass over all the per-cpu cpu_sibling_maps at boot, update the maps at cpu online/offline time. This is a behavior change -- the thread_siblings attribute now reflects only online siblings, whereas it would display offline siblings before. The new behavior matches that of x86, and is arguably more useful. Signed-off-by: Nathan Lynch <ntl@pobox.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel/setup-common.c')
-rw-r--r--arch/powerpc/kernel/setup-common.c24
1 files changed, 0 insertions, 24 deletions
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 61a3f413208..9cc5a52711e 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -367,7 +367,6 @@ static void __init cpu_init_thread_core_maps(int tpc)
* setup_cpu_maps - initialize the following cpu maps:
* cpu_possible_map
* cpu_present_map
- * cpu_sibling_map
*
* Having the possible map set up early allows us to restrict allocations
* of things like irqstacks to num_possible_cpus() rather than NR_CPUS.
@@ -475,29 +474,6 @@ void __init smp_setup_cpu_maps(void)
*/
cpu_init_thread_core_maps(nthreads);
}
-
-/*
- * Being that cpu_sibling_map is now a per_cpu array, then it cannot
- * be initialized until the per_cpu areas have been created. This
- * function is now called from setup_per_cpu_areas().
- */
-void __init smp_setup_cpu_sibling_map(void)
-{
-#ifdef CONFIG_PPC64
- int i, cpu, base;
-
- for_each_possible_cpu(cpu) {
- DBG("Sibling map for CPU %d:", cpu);
- base = cpu_first_thread_in_core(cpu);
- for (i = 0; i < threads_per_core; i++) {
- cpu_set(base + i, per_cpu(cpu_sibling_map, cpu));
- DBG(" %d", base + i);
- }
- DBG("\n");
- }
-
-#endif /* CONFIG_PPC64 */
-}
#endif /* CONFIG_SMP */
#ifdef CONFIG_PCSPKR_PLATFORM