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The intern_stack function is responsible for retrieving or creating a stack_id based on the provided frame_id and prefix_id. It first generates a key using the frame_id and prefix_id values. If the stack corresponding to the key is found in the stackMap, it is returned. Otherwise, a new stack is created by appending the prefix_id and frame_id to the stackTable. The key and the index of the newly created stack are added to the stackMap for future reference. The _intern_frame function is responsible for retrieving or creating a frame_id based on the provided frame string. If the frame_id corresponding to the frameString is found in the frameMap, it is returned. Otherwise, a new frame is created by appending relevant information to the frameTable and adding the frameString to the string_id through _intern_string. The _intern_string function will gets a matching string, or saves the new string and returns a String ID. Signed-off-by: Anup Sharma <anupnewsmail@gmail.com> Link: https://lore.kernel.org/r/4442f4b1ab4c7317cf940560a3a285fcdfbeeb08.1689961706.git.anupnewsmail@gmail.com Cc: Mark Rutland <mark.rutland@arm.com> Cc: Ian Rogers <irogers@google.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: linux-kernel@vger.kernel.org Cc: linux-perf-users@vger.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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.