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Chengming Zhou
c4a0ebf87c
As we do in commit0c0593b45c("x86/ftrace: Make function graph use ftrace directly"), we don't need special hook for graph tracer, but instead we use graph_ops:func function to install return_hooker. Since commit3b23e4991f("arm64: implement ftrace with regs") add implementation for FTRACE_WITH_REGS on arm64, we can easily adopt the same cleanup on arm64. And this cleanup only changes the FTRACE_WITH_REGS implementation, so the mcount-based implementation is unaffected. While in theory it would be possible to make a similar cleanup for !FTRACE_WITH_REGS, this will require rework of the core code, and so for now we only change the FTRACE_WITH_REGS implementation. Tested-by: Mark Rutland <mark.rutland@arm.com> Reviewed-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com> Link: https://lore.kernel.org/r/20220420160006.17880-2-zhouchengming@bytedance.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.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.