be826ada52
set_protocol() is never called in atomic context. The call chains ending up at set_protocol() are: [1] set_protocol() <- monitor_card() [2] set_protocol() <- cmm_ioctl() monitor_card() is only set in setup_timer(), and cmm_ioctl() is only set as ".unlocked_ioctl" in file_operations structure "cm4000_fops". Despite never getting called from atomic context, set_protocol() calls mdelay(10), i.e. busy wait for 10ms. That is not necessary and can be replaced with usleep_range to avoid busy waiting. This is found by a static analysis tool named DCNS written by myself. Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com> Acked-by: Harald Welte <laforge@gnumonks.org> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
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.
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.