The patch titled
Subject: userfaultfd: non-cooperative: Add fork() event, build warning fix
has been added to the -mm tree. Its filename is
userfaultfd-non-cooperative-add-fork-event-build-warning-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/userfaultfd-non-cooperative-add-fork-event-build-warning-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/userfaultfd-non-cooperative-add-fork-event-build-warning-fix.patch
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------------------------------------------------------
From: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Subject: userfaultfd: non-cooperative: Add fork() event, build warning fix
It was harmless, but 32bit kernel builds would emit warnings if not
passing through an (unsigned long) cast of the pointer, before storing it
in a __u64.
Warning found by the kbuild test robot.
Link: http://lkml.kernel.org/r/20161216144821.5183-10-aarcange@xxxxxxxxxx
Signed-off-by: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: "Dr. David Alan Gilbert" <dgilbert@xxxxxxxxxx>
Cc: Hillf Danton <hillf.zj@xxxxxxxxxxxxxxx>
Cc: Michael Rapoport <RAPOPORT@xxxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Mike Rapoport <rppt@xxxxxxxxxxxxxxxxxx>
Cc: Pavel Emelyanov <xemul@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/userfaultfd.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff -puN fs/userfaultfd.c~userfaultfd-non-cooperative-add-fork-event-build-warning-fix fs/userfaultfd.c
--- a/fs/userfaultfd.c~userfaultfd-non-cooperative-add-fork-event-build-warning-fix
+++ a/fs/userfaultfd.c
@@ -545,7 +545,7 @@ static int dup_fctx(struct userfaultfd_f
msg_init(&ewq.msg);
ewq.msg.event = UFFD_EVENT_FORK;
- ewq.msg.arg.reserved.reserved1 = (__u64)fctx->new;
+ ewq.msg.arg.reserved.reserved1 = (unsigned long)fctx->new;
return userfaultfd_event_wait_completion(ctx, &ewq);
}
@@ -799,7 +799,9 @@ static ssize_t userfaultfd_ctx_read(stru
*msg = uwq->msg;
if (uwq->msg.event == UFFD_EVENT_FORK) {
- fork_nctx = (struct userfaultfd_ctx *)uwq->msg.arg.reserved.reserved1;
+ fork_nctx = (struct userfaultfd_ctx *)
+ (unsigned long)
+ uwq->msg.arg.reserved.reserved1;
list_move(&uwq->wq.task_list, &fork_event);
spin_unlock(&ctx->event_wqh.lock);
ret = 0;
_
Patches currently in -mm which might be from aarcange@xxxxxxxxxx are
userfaultfd-document-_ior-_iow.patch
userfaultfd-correct-comment-about-uffd_feature_pagefault_flag_wp.patch
userfaultfd-convert-bug-to-warn_on_once.patch
userfaultfd-use-vma_is_anonymous.patch
userfaultfd-non-cooperative-report-all-available-features-to-userland.patch
userfaultfd-non-cooperative-add-fork-event-build-warning-fix.patch
userfaultfd-non-cooperative-optimize-mremap_userfaultfd_complete.patch
userfaultfd-non-cooperative-avoid-madv_dontneed-race-condition.patch
userfaultfd-non-cooperative-wake-userfaults-after-uffdio_unregister.patch
userfaultfd-hugetlbfs-gup-support-vm_fault_retry.patch
userfaultfd-hugetlbfs-uffd_feature_missing_hugetlbfs.patch
userfaultfd-shmem-add-tlbflushh-header-for-microblaze.patch
userfaultfd-shmem-lock-the-page-before-adding-it-to-pagecache.patch
userfaultfd-shmem-avoid-leaking-blocks-and-used-blocks-in-uffdio_copy.patch
userfaultfd-hugetlbfs-uffd_feature_missing_shmem.patch
userfaultfd-selftest-test-uffdio_zeropage-on-all-memory-types.patch
mm-mprotect-use-pmd_trans_unstable-instead-of-taking-the-pmd_lock.patch
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