5d79fa0d33
If CONFIG_SYSCTL and CONFIG_DYNAMIC_FTRACE is n, build warns:
kernel/trace/ftrace.c:7912:13: error: ‘is_permanent_ops_registered’ defined but not used [-Werror=unused-function]
static bool is_permanent_ops_registered(void)
^~~~~~~~~~~~~~~~~~~~~~~~~~~
kernel/trace/ftrace.c:89:12: error: ‘last_ftrace_enabled’ defined but not used [-Werror=unused-variable]
static int last_ftrace_enabled;
^~~~~~~~~~~~~~~~~~~
Move is_permanent_ops_registered() to ifdef block and mark last_ftrace_enabled as
__maybe_unused to fix this.
Fixes: 7cde53da38a3 ("ftrace: move sysctl_ftrace_enabled to ftrace.c")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
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.