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When the lwi arg has a timeout, but no timeout callback function, l_wait_event() acts much the same as wait_event_idle_timeout() - the wait is not interruptible and simply waits for the event or the timeouts. The most noticable difference is that the return value is -ETIMEDOUT or 0, rather than 0 or non-zero. Another difference is that if the timeout is zero, l_wait_event() will not time out at all. In the one case where that is possible we need to conditionally use wait_event_idle(). So replace all such calls with wait_event_idle_timeout(), being careful of the return value. In one case, there is no event expected, only the timeout is needed. So use schedule_timeout_uninterruptible(). Note that the presence or absence of LWI_ON_SIGNAL_NOOP has no effect in these cases. It only has effect if the timeout callback is non-NULL, or the timeout is zero, or LWI_TIMEOUT_INTR_ALL() is used. Reviewed-by: James Simmons <jsimmons@infradead.org> Signed-off-by: NeilBrown <neilb@suse.com> Reviewed-by: Patrick Farrell <paf@cray.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.