• Steven Rostedt (VMware)'s avatar
    x86/function_graph: Simplify with function_graph_enter() · 07f7175b
    Steven Rostedt (VMware) authored
    The function_graph_enter() function does the work of calling the function
    graph hook function and the management of the shadow stack, simplifying the
    work done in the architecture dependent prepare_ftrace_return().
    
    Have x86 use the new code, and remove the shadow stack management as well as
    having to set up the trace structure.
    
    This is needed to prepare for a fix of a design bug on how the curr_ret_stack
    is used.
    
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Ingo Molnar <mingo@redhat.com>
    Cc: Borislav Petkov <bp@alien8.de>
    Cc: "H. Peter Anvin" <hpa@zytor.com>
    Cc: x86@kernel.org
    Cc: stable@kernel.org
    Fixes: 03274a3f ("tracing/fgraph: Adjust fgraph depth before calling trace return callback")
    Reviewed-by: default avatarMasami Hiramatsu <mhiramat@kernel.org>
    Signed-off-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
    07f7175b
ftrace.c 24.8 KB