powerpc/mm/nohash: Ignore NULL stale_map entries
This happens with threads that are offline due to CPU hotplug (including threads that were never "plugged in" to begin with because SMT is disabled). Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
parent
35fd219a26
commit
39a421ff0b
|
@ -112,8 +112,10 @@ static unsigned int steal_context_smp(unsigned int id)
|
|||
*/
|
||||
for_each_cpu(cpu, mm_cpumask(mm)) {
|
||||
for (i = cpu_first_thread_sibling(cpu);
|
||||
i <= cpu_last_thread_sibling(cpu); i++)
|
||||
__set_bit(id, stale_map[i]);
|
||||
i <= cpu_last_thread_sibling(cpu); i++) {
|
||||
if (stale_map[i])
|
||||
__set_bit(id, stale_map[i]);
|
||||
}
|
||||
cpu = i - 1;
|
||||
}
|
||||
return id;
|
||||
|
@ -272,7 +274,8 @@ void switch_mmu_context(struct mm_struct *prev, struct mm_struct *next)
|
|||
/* XXX This clear should ultimately be part of local_flush_tlb_mm */
|
||||
for (i = cpu_first_thread_sibling(cpu);
|
||||
i <= cpu_last_thread_sibling(cpu); i++) {
|
||||
__clear_bit(id, stale_map[i]);
|
||||
if (stale_map[i])
|
||||
__clear_bit(id, stale_map[i]);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
Loading…
Reference in New Issue