selftests/filesystems: expand epoll with epoll_pwait2
Code coverage for the epoll_pwait2 syscall. epoll62: Repeat basic test epoll1, but exercising the new syscall. epoll63: Pass a timespec and exercise the timeout wakeup path. Link: https://lkml.kernel.org/r/20201121144401.3727659-5-willemdebruijn.kernel@gmail.comSigned-off-by: Willem de Bruijn <willemb@google.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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