Ben Dai 9bafb37470 ANDROID: arm64: Fix the address of ftrace_call compiled with CFI_CLANG
When CONFIG_CFI_CLANG and CONFIG_DYNAMIC_FTRACE are enabled, LLVM will
generate a jump function named ftrace_call.cfi_jt for ftrace_call, which
makes "&ftrace_call" in ftrace_update_ftrace_func() actually the address
of ftrace_call.cfi_jt. As a result, the tracer can't be really enabled
through runtime modification. Use __va_function() to get the actual address
of ftrace_call to fix the issue.

Bug: 184105181
Signed-off-by: Ben Dai <ben.dai@unisoc.com>
Change-Id: Ic9272cd4ab447b3b145d8e397e5c9010c49f7a12
2025-03-30 23:53:38 +01:00
2022-11-20 19:48:44 +02:00
2022-11-20 19:48:48 +02:00

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.
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.
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