• Steven Rostedt's avatar
    ftrace: mcount call site on boot nops core · 68bf21aa
    Steven Rostedt authored
    This is the infrastructure to the converting the mcount call sites
    recorded by the __mcount_loc section into nops on boot. It also allows
    for using these sites to enable tracing as normal. When the __mcount_loc
    section is used, the "ftraced" kernel thread is disabled.
    
    This uses the current infrastructure to record the mcount call sites
    as well as convert them to nops. The mcount function is kept as a stub
    on boot up and not converted to the ftrace_record_ip function. We use the
    ftrace_record_ip to only record from the table.
    
    This patch does not handle modules. That comes with a later patch.
    Signed-off-by: default avatarSteven Rostedt <srostedt@redhat.com>
    Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
    68bf21aa
ftrace.h 541 Bytes