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devobj/fileobj: do not try to free memory for device file mappings

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Balazs Gerofi
2017-01-08 11:49:55 +09:00
parent d34884f9a4
commit 1ff0afe6fb
5 changed files with 11 additions and 3 deletions
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6
arch/x86/kernel/memory.c
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@ -1097,7 +1097,8 @@ static int clear_range_l1(void *args0, pte_t *ptep, uint64_t base,
page = phys_to_page(phys);
}
if (page && page_is_in_memobj(page) && (old & PFL1_DIRTY)) {
if (page && page_is_in_memobj(page) && (old & PFL1_DIRTY) &&
!(args->memobj->flags & MF_ZEROFILL)) {
memobj_flush_page(args->memobj, phys, PTL1_SIZE);
}
@ -1271,6 +1272,9 @@ static int clear_range(struct page_table *pt, struct process_vm *vm,
}
args.free_physical = free_physical;
if (memobj && (memobj->flags & MF_DEV_FILE)) {
args.free_physical = 0;
}
args.memobj = memobj;
args.vm = vm;