Re: [RFC PATCH v11 12/29] KVM: Add KVM_CREATE_GUEST_MEMFD ioctl() for guest-specific backing memory
From: Ryan Afranji <hidden>
Date: 2023-08-03 19:16:08
Also in:
kvm, kvm-riscv, kvmarm, linux-arm-kernel, linux-fsdevel, linux-mips, linux-mm, linux-riscv, linuxppc-dev, lkml
+static struct folio *kvm_gmem_get_folio(struct file *file, pgoff_t index)
+{
+ struct folio *folio;
+
+ /* TODO: Support huge pages. */
+ folio = filemap_grab_folio(file->f_mapping, index);
+ if (!folio)
+ return NULL;In Linux 6.4, filemap_grab_folio() may also return an error value. Instead of just checking for NULL, "IS_ERR_OR_NULL(folio)" will be needed.