The patch titled
Subject: userfaultfd-non-cooperative-add-event-for-exit-notification-fix
has been added to the -mm tree. Its filename is
userfaultfd-non-cooperative-add-event-for-exit-notification-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/userfaultfd-non-cooperative-add-event-for-exit-notification-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/userfaultfd-non-cooperative-add-event-for-exit-notification-fix.patch
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------------------------------------------------------
From: Mike Rapoport <rppt@xxxxxxxxxxxxxxxxxx>
Subject: userfaultfd-non-cooperative-add-event-for-exit-notification-fix
add comment
Link: http://lkml.kernel.org/r/20170202135448.GB19804@rapoport-lnx
Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/userfaultfd.c | 4 ++++
1 file changed, 4 insertions(+)
diff -puN fs/userfaultfd.c~userfaultfd-non-cooperative-add-event-for-exit-notification-fix fs/userfaultfd.c
--- a/fs/userfaultfd.c~userfaultfd-non-cooperative-add-event-for-exit-notification-fix
+++ a/fs/userfaultfd.c
@@ -778,6 +778,10 @@ void userfaultfd_exit(struct mm_struct *
{
struct vm_area_struct *vma = mm->mmap;
+ /*
+ * We can do the vma walk without locking because the caller
+ * (exit_mm) knows it now has exclusive access
+ */
while (vma) {
struct userfaultfd_ctx *ctx = vma->vm_userfaultfd_ctx.ctx;
_
Patches currently in -mm which might be from rppt@xxxxxxxxxxxxxxxxxx are
userfaultfd-non-cooperative-dup_userfaultfd-use-mm_count-instead-of-mm_users.patch
userfaultfd-introduce-vma_can_userfault.patch
userfaultfd-shmem-add-shmem_mcopy_atomic_pte-for-userfaultfd-support.patch
userfaultfd-shmem-introduce-vma_is_shmem.patch
userfaultfd-shmem-use-shmem_mcopy_atomic_pte-for-shared-memory.patch
userfaultfd-shmem-add-userfaultfd-hook-for-shared-memory-faults.patch
userfaultfd-shmem-allow-registration-of-shared-memory-ranges.patch
userfaultfd-shmem-add-userfaultfd_shmem-test.patch
userfaultfd-non-cooperative-selftest-introduce-userfaultfd_open.patch
userfaultfd-non-cooperative-selftest-add-ufd-parameter-to-copy_page.patch
userfaultfd-non-cooperative-selftest-add-test-for-fork-madvdontneed-and-remap-events.patch
userfaultfd-non-cooperative-rename-event_madvdontneed-to-event_remove.patch
userfaultfd-non-cooperative-add-madvise-event-for-madv_remove-request.patch
userfaultfd-non-cooperative-selftest-enable-remove-event-test-for-shmem.patch
mm-call-vm_munmap-in-munmap-syscall-instead-of-using-open-coded-version.patch
userfaultfd-non-cooperative-add-event-for-memory-unmaps.patch
userfaultfd-non-cooperative-add-event-for-exit-notification.patch
userfaultfd-non-cooperative-add-event-for-exit-notification-fix.patch
userfaultfd-mcopy_atomic-return-enoent-when-no-compatible-vma-found.patch
userfaultfd_copy-return-enospc-in-case-mm-has-gone.patch
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