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7522416d25
This macro is no-op unless TUN_DEBUG is defined (which requires editing and recompiling the source) and only does something if variable debug is 2 but that variable is zero initialized and never set to anything else. Moreover, the only use of the macro informs about entering function tun_chr_open() which can be easily achieved using ftrace or kprobe. Drop DBG1() macro, its only use and global variable debug. Signed-off-by: Michal Kubecek <mkubecek@suse.cz> Signed-off-by: David S. Miller <davem@davemloft.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.
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.