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authorMike Rapoport <rppt@linux.vnet.ibm.com>2017-02-25 01:58:25 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-02-25 04:46:55 +0300
commitca49ca7114553587736fe78319e22f073b631380 (patch)
treeef56409db78f5d218c2aca6b7d49901658a6edaa /include/linux/userfaultfd_k.h
parent897ab3e0c49e24b62e2d54d165c7afec6bbca65b (diff)
downloadlinux-ca49ca7114553587736fe78319e22f073b631380.tar.xz
userfaultfd: non-cooperative: add event for exit() notification
Allow userfaultfd monitor track termination of the processes that have memory backed by the uffd. [rppt@linux.vnet.ibm.com: add comment] Link: http://lkml.kernel.org/r/20170202135448.GB19804@rapoport-lnxLink: http://lkml.kernel.org/r/1485542673-24387-4-git-send-email-rppt@linux.vnet.ibm.com Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com> Acked-by: Hillf Danton <hillf.zj@alibaba-inc.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Pavel Emelyanov <xemul@virtuozzo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/userfaultfd_k.h')
-rw-r--r--include/linux/userfaultfd_k.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/userfaultfd_k.h b/include/linux/userfaultfd_k.h
index a40be5d0661b..0468548acebf 100644
--- a/include/linux/userfaultfd_k.h
+++ b/include/linux/userfaultfd_k.h
@@ -72,6 +72,8 @@ extern int userfaultfd_unmap_prep(struct vm_area_struct *vma,
extern void userfaultfd_unmap_complete(struct mm_struct *mm,
struct list_head *uf);
+extern void userfaultfd_exit(struct mm_struct *mm);
+
#else /* CONFIG_USERFAULTFD */
/* mm helpers */
@@ -136,6 +138,11 @@ static inline void userfaultfd_unmap_complete(struct mm_struct *mm,
struct list_head *uf)
{
}
+
+static inline void userfaultfd_exit(struct mm_struct *mm)
+{
+}
+
#endif /* CONFIG_USERFAULTFD */
#endif /* _LINUX_USERFAULTFD_K_H */