mmc: properly iterate over sg list in debug check

[linux-2.6-omap-h63xx.git] / kernel / cpu.c

diff --git a/kernel/cpu.c b/kernel/cpu.c
index cf79bb9113717da8b151f18c091f8dd6acfbf968..e202a68d1cc180cf62ade78b025ec2329c8aabcd 100644 (file)
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -248,10 +248,10 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen)
        cpus_setall(tmp);
        cpu_clear(cpu, tmp);
        set_cpus_allowed_ptr(current, &tmp);
+       tmp = cpumask_of_cpu(cpu);
 
-       err = __stop_machine_run(take_cpu_down, &tcd_param, cpu);
-
-       if (err || cpu_online(cpu)) {
+       err = __stop_machine(take_cpu_down, &tcd_param, &tmp);
+       if (err) {
                /* CPU didn't die: tell everyone.  Can't complain. */
                if (raw_notifier_call_chain(&cpu_chain, CPU_DOWN_FAILED | mod,
                                            hcpu) == NOTIFY_BAD)
@@ -259,6 +259,7 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen)
 
                goto out_allowed;
        }
+       BUG_ON(cpu_online(cpu));
 
        /* Wait for it to sleep (leaving idle task). */
        while (!idle_cpu(cpu))
@@ -454,3 +455,28 @@ out:
 #endif /* CONFIG_PM_SLEEP_SMP */
 
 #endif /* CONFIG_SMP */
+
+/*
+ * cpu_bit_bitmap[] is a special, "compressed" data structure that
+ * represents all NR_CPUS bits binary values of 1<<nr.
+ *
+ * It is used by cpumask_of_cpu() to get a constant address to a CPU
+ * mask value that has a single bit set only.
+ */
+
+/* cpu_bit_bitmap[0] is empty - so we can back into it */
+#define MASK_DECLARE_1(x)      [x+1][0] = 1UL << (x)
+#define MASK_DECLARE_2(x)      MASK_DECLARE_1(x), MASK_DECLARE_1(x+1)
+#define MASK_DECLARE_4(x)      MASK_DECLARE_2(x), MASK_DECLARE_2(x+2)
+#define MASK_DECLARE_8(x)      MASK_DECLARE_4(x), MASK_DECLARE_4(x+4)
+
+const unsigned long cpu_bit_bitmap[BITS_PER_LONG+1][BITS_TO_LONGS(NR_CPUS)] = {
+
+       MASK_DECLARE_8(0),      MASK_DECLARE_8(8),
+       MASK_DECLARE_8(16),     MASK_DECLARE_8(24),
+#if BITS_PER_LONG > 32
+       MASK_DECLARE_8(32),     MASK_DECLARE_8(40),
+       MASK_DECLARE_8(48),     MASK_DECLARE_8(56),
+#endif
+};
+EXPORT_SYMBOL_GPL(cpu_bit_bitmap);