Hou Tao 9a91b05bba block: also check RQF_STATS in blk_mq_need_time_stamp()
In __blk_mq_end_request() if block stats needs update, we should
ensure now is valid instead of 0 even when iostat is disabled.

Signed-off-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-09-15 16:02:10 -06:00
2019-08-04 10:30:47 -07:00
2019-07-11 15:40:06 -07:00
2019-08-03 07:02:01 -07:00
2019-08-02 18:40:49 -07:00
2019-08-02 08:53:34 -07:00
2019-09-10 12:31:39 -06:00
2019-07-22 14:57:50 +01:00
2019-07-19 12:22:04 -07:00
2019-03-10 17:48:21 -07:00
2019-08-04 18:40:12 -07:00

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

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.
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