The patch titled
Subject: mm-memoryc-fix-race-when-faulting-a-device-private-page-fix
has been added to the -mm mm-unstable branch. Its filename is
mm-memoryc-fix-race-when-faulting-a-device-private-page-fix.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-memoryc-fix-race-when-faulting-a-device-private-page-fix.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Subject: mm-memoryc-fix-race-when-faulting-a-device-private-page-fix
Date: Thu, 29 Sep 2022 10:07:26 +1000
fix build
kvmppc_svm_page_out() is called via some paths other than the
migrate_to_ram callback.
I think it's correct to just pass fault_page = NULL when it's not called
from the migrate_to_ram callback?
Link: https://lkml.kernel.org/r/87fsgbf3gh.fsf@xxxxxxxxxxxxxxxxxx
Cc: Alistair Popple <apopple@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/arch/powerpc/kvm/book3s_hv_uvmem.c~mm-memoryc-fix-race-when-faulting-a-device-private-page-fix
+++ a/arch/powerpc/kvm/book3s_hv_uvmem.c
@@ -637,7 +637,7 @@ void kvmppc_uvmem_drop_pages(const struc
pvt->remove_gfn = true;
if (__kvmppc_svm_page_out(vma, addr, addr + PAGE_SIZE,
- PAGE_SHIFT, kvm, pvt->gpa))
+ PAGE_SHIFT, kvm, pvt->gpa, NULL))
pr_err("Can't page out gpa:0x%lx addr:0x%lx\n",
pvt->gpa, addr);
} else {
@@ -1068,7 +1068,7 @@ kvmppc_h_svm_page_out(struct kvm *kvm, u
if (!vma || vma->vm_start > start || vma->vm_end < end)
goto out;
- if (!kvmppc_svm_page_out(vma, start, end, page_shift, kvm, gpa))
+ if (!kvmppc_svm_page_out(vma, start, end, page_shift, kvm, gpa, NULL))
ret = H_SUCCESS;
out:
mmap_read_unlock(kvm->mm);
_
Patches currently in -mm which might be from mpe@xxxxxxxxxxxxxx are
mm-memoryc-fix-race-when-faulting-a-device-private-page-fix.patch
