Fix regression caused by commit af51a2a which added ->tmpfile()

support (along with a similar fix for ext3)

Linux 3.10

Linux 3.10-rc7

Linux 3.10-rc6

Linux 3.10-rc5

Linux 3.10-rc4

Linux 3.10-rc3

Linux 3.10-rc2

Linux 3.10-rc1

Linux 3.9