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[ Upstream commit 393da6cbb2ff89aadc47683a85269f913aa1c139 ] ftrace_graph_ret_addr() takes an `idx` integer pointer that is used to optimize the stack unwinding. Pass it a valid pointer to utilize the optimizations that might be available in the future. The commit is making riscv's usage of ftrace_graph_ret_addr() match x86_64. Signed-off-by: Puranjay Mohan <puranjay@kernel.org> Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org> Link: https://lore.kernel.org/r/20240618145820.62112-1-puranjay@kernel.org Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com> Signed-off-by: Sasha Levin <sashal@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.