evie/android_kernel_oneplus_msm8998
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ARM: memory hotplug: stop cpus while memory hotremove

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

Change-Id: If4084768044dd95601bdc5993d14bc6b0a5921c3
Signed-off-by: Venkata Rao Kakani <vkakani@codeaurora.org>
This commit is contained in:
Venkata Rao Kakani 2018-06-18 14:23:12 +05:30 • committed by Gerrit - the friendly Code Review server
parent 2386158c7b
commit ebef173049
1 changed files with 7 additions and 0 deletions
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7
arch/arm64/mm/mmu.c
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@ -1037,7 +1037,11 @@ void remove_pagetable(unsigned long start, unsigned long end, bool direct)
unsigned long addr; unsigned long addr;
pgd_t *pgd; pgd_t *pgd;
pud_t *pud; 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) { for (addr = start; addr < end; addr = next) {
next = pgd_addr_end(addr, end); next = pgd_addr_end(addr, end);
@ -1058,6 +1062,9 @@ void remove_pagetable(unsigned long start, unsigned long end, bool direct)
} }
flush_tlb_all(); flush_tlb_all();
for_each_possible_cpu(cpu)
if (current->cpu != cpu)
sched_unisolate_cpu_unlocked(cpu);
} }