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Dan Carpenter sent a patch to remove a check in ftrace_match_record() because the logic of the code made the check redundant. I looked deeper into the code, and made the following logic table, with the three variables and the result of the original code. modname mod_matches exclude_mod result ------- ----------- ----------- ------ 0 0 0 return 0 0 0 1 func_match 0 1 * < cannot exist > 1 0 0 return 0 1 0 1 func_match 1 1 0 func_match 1 1 1 return 0 Notice that when mod_matches == exclude mod, the result is always to return 0, and when mod_matches != exclude_mod, then the result is to test the function. This means we only need test if mod_matches is equal to exclude_mod. Cc: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.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.