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Commit ebef1730 authored by Venkata Rao Kakani's avatar Venkata Rao Kakani Committed by Gerrit - the friendly Code Review server
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ARM: memory hotplug: stop cpus while memory hotremove 



Avoid page table corruptions during memory hotremove by
stopping all other cpus.

Change-Id: If4084768044dd95601bdc5993d14bc6b0a5921c3
Signed-off-by: default avatarVenkata Rao Kakani <vkakani@codeaurora.org>
parent 2386158c

arch/arm64/mm/mmu.c

+7 −0
Original line number Diff line number Diff line
@@ -1037,7 +1037,11 @@ void remove_pagetable(unsigned long start, unsigned long end, bool direct) 
	unsigned long addr;

	pgd_t *pgd;

	pud_t *pud;

	int cpu;



	for_each_possible_cpu(cpu)

		if (current->cpu != cpu)

			sched_isolate_cpu(cpu);

	for (addr = start; addr < end; addr = next) {

		next = pgd_addr_end(addr, end);
@@ -1058,6 +1062,9 @@ void remove_pagetable(unsigned long start, unsigned long end, bool direct) 
	}



	flush_tlb_all();

	for_each_possible_cpu(cpu)

		if (current->cpu != cpu)

			sched_unisolate_cpu_unlocked(cpu);

}