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rus_vm_fault: vmf_insert_pfn: treat VM_FAULT_NOPAGE as success

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vmf_insert_pfn is added with the following commit.
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=1c8f422059ae5da07db7406ab916203f9417e396

Refer to the following page for the meaning of VM_FAULT_NOPAGE.
https://lwn.net/Articles/242237/

Change-Id: I2b0144a20a57c74e0e2e0d2fc24281852f49b717
This commit is contained in:
Masamichi Takagi
2020-12-22 16:21:32 +09:00
parent fe3992a3a2
commit 67334b65c3
1 changed files with 7 additions and 1 deletions
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8
executer/kernel/mcctrl/syscall.c
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@@ -692,14 +692,20 @@ static int rus_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
vma->vm_start, vma->vm_end, pgsize, pix); vma->vm_start, vma->vm_end, pgsize, pix);
} }
} }
else else {
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 18, 0) #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 18, 0)
error = vmf_insert_pfn(vma, rva+(pix*PAGE_SIZE), error = vmf_insert_pfn(vma, rva+(pix*PAGE_SIZE),
pfn+pix); pfn+pix);
if (error == VM_FAULT_NOPAGE) {
dprintk("%s: vmf_insert_pfn returned %d\n",
__func__, error);
error = 0;
}
#else #else
error = vm_insert_pfn(vma, rva+(pix*PAGE_SIZE), error = vm_insert_pfn(vma, rva+(pix*PAGE_SIZE),
pfn+pix); pfn+pix);
#endif #endif
}
if (error) { if (error) {
pr_err("%s: vm_insert_pfn returned %d\n", pr_err("%s: vm_insert_pfn returned %d\n",
__func__, error); __func__, error);