select: change do_poll() to return -ERESTARTNOHAND rather than -EINTR

do_poll() returns -EINTR if interrupted and after that all its callers
have to translate it into -ERESTARTNOHAND.  Change do_poll() to return
-ERESTARTNOHAND and update (simplify) the callers.

Note that this also unifies all users of restore_saved_sigmask_unless(),
see the next patch.

Linus:

: The *right* return value will actually be then chosen by
: poll_select_copy_remaining(), which will turn ERESTARTNOHAND to EINTR
: when it can't update the timeout.
:
: Except for the cases that use restart_block and do that instead and
: don't have the whole timeout restart issue as a result.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Oleg Nesterov <[email protected]>
Acked-by: Linus Torvalds <[email protected]>
Cc: Al Viro <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: David Laight <[email protected]>
Cc: Davidlohr Bueso <[email protected]>
Cc: Deepa Dinamani <[email protected]>
Cc: Eric W. Biederman <[email protected]>
Cc: Eric Wong <[email protected]>
Cc: Jason Baron <[email protected]>
Cc: Jens Axboe <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions