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ia64: make cpu_callin_map non-volatile. 

cpumask_test_cpu() doesn't take volatile, unlike the obsoleted
cpu_isset.  The only place ia64 really cares is the spin waiting for a
bit; udelay() is probably a barrier but insert barrier() to be sure.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Rusty Russell 2015-06-01 15:53:53 +09:30 committed by Tony Luck
parent c65b99f046
commit 5eda7861e3
1 changed files with 2 additions and 1 deletions
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3
arch/ia64/kernel/smpboot.c
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@ -127,7 +127,7 @@ int smp_num_siblings = 1;
volatile int ia64_cpu_to_sapicid[NR_CPUS];
EXPORT_SYMBOL(ia64_cpu_to_sapicid);
static volatile cpumask_t cpu_callin_map;
static cpumask_t cpu_callin_map;
struct smp_boot_data smp_boot_data __initdata;
@ -477,6 +477,7 @@ do_boot_cpu (int sapicid, int cpu, struct task_struct *idle)
for (timeout = 0; timeout < 100000; timeout++) {
if (cpumask_test_cpu(cpu, &cpu_callin_map))
break; /* It has booted */
barrier(); /* Make sure we re-read cpu_callin_map */
udelay(100);
}
Dprintk("\n");