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use vm_insert_page() if 'struct page' exists

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NAKAMURA Gou
2014-08-07 16:03:36 +09:00
parent fe39d56554
commit b4910ec33f
1 changed files with 13 additions and 0 deletions
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13
executer/kernel/syscall.c
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@ -405,6 +405,19 @@ static int rus_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
pfn = phys >> PAGE_SHIFT; pfn = phys >> PAGE_SHIFT;
#if USE_VM_INSERT_PFN #if USE_VM_INSERT_PFN
for (pix = 0; pix < (pgsize / PAGE_SIZE); ++pix) { for (pix = 0; pix < (pgsize / PAGE_SIZE); ++pix) {
struct page *page;
if (pfn_valid(pfn+pix)) {
page = pfn_to_page(pfn+pix);
if (!page_count(page)) {
get_page(page);
}
error = vm_insert_page(vma, rva+(pix*PAGE_SIZE), page);
if (error) {
printk("vm_insert_page: %d\n", error);
}
}
else
error = vm_insert_pfn(vma, rva+(pix*PAGE_SIZE), pfn+pix); error = vm_insert_pfn(vma, rva+(pix*PAGE_SIZE), pfn+pix);
if (error) { if (error) {
break; break;