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authorAndrea Arcangeli <aarcange@redhat.com>2017-09-06 16:23:59 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-09-06 17:27:29 -0700
commita36985d31a65d5c0559fb582719e32eaf0ccec3b (patch)
tree422c04b7bd357e1f1f23ff4576c139ca272b8546 /fs
parent9d4ac934829ac58c5109c49e6dfe677300e5e652 (diff)
userfaultfd: provide pid in userfault msg - add feat union
No ABI change, but this will make it more explicit to software that ptid is only available if requested by passing UFFD_FEATURE_THREAD_ID to UFFDIO_API. The fact it's a union will also self document it shouldn't be taken for granted there's a tpid there. Link: http://lkml.kernel.org/r/20170802165145.22628-7-aarcange@redhat.com Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com> Cc: Alexey Perevalov <a.perevalov@samsung.com> Cc: Maxime Coquelin <maxime.coquelin@redhat.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Mike Rapoport <rppt@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/userfaultfd.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/userfaultfd.c b/fs/userfaultfd.c
index 665bf7a930b2..5419e7da82ba 100644
--- a/fs/userfaultfd.c
+++ b/fs/userfaultfd.c
@@ -204,7 +204,7 @@ static inline struct uffd_msg userfault_msg(unsigned long address,
*/
msg.arg.pagefault.flags |= UFFD_PAGEFAULT_FLAG_WP;
if (features & UFFD_FEATURE_THREAD_ID)
- msg.arg.pagefault.ptid = task_pid_vnr(current);
+ msg.arg.pagefault.feat.ptid = task_pid_vnr(current);
return msg;
}