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visit_pte_range(): visit L1 PTEs but don't free for MF_PREMAP files

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Balazs Gerofi
2017-07-07 07:32:53 +09:00
parent f81722c63b
commit 209748d913
1 changed files with 4 additions and 8 deletions
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12
arch/x86/kernel/memory.c
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@ -1075,7 +1075,6 @@ int visit_pte_range(page_table_t pt, void *start0, void *end0, int pgshift,
struct clear_range_args {
int free_physical;
int dont_walk_l1;
struct memobj *memobj;
struct process_vm *vm;
};
@ -1167,11 +1166,9 @@ static int clear_range_l2(void *args0, pte_t *ptep, uint64_t base,
}
pt = phys_to_virt(*ptep & PT_PHYSMASK);
if (!args->dont_walk_l1) {
error = walk_pte_l1(pt, base, start, end, &clear_range_l1, args0);
if (error && (error != -ENOENT)) {
return error;
}
error = walk_pte_l1(pt, base, start, end, &clear_range_l1, args0);
if (error && (error != -ENOENT)) {
return error;
}
if ((start <= base) && ((base + PTL2_SIZE) <= end)) {
@ -1281,9 +1278,8 @@ static int clear_range(struct page_table *pt, struct process_vm *vm,
if (memobj && (memobj->flags & MF_DEV_FILE)) {
args.free_physical = 0;
}
args.dont_walk_l1 = 0;
if (memobj && ((memobj->flags & MF_PREMAP))) {
args.dont_walk_l1 = 1;
args.free_physical = 0;
}
args.memobj = memobj;
args.vm = vm;