• David Carrillo-Cisneros's avatar
    perf/x86: Set pmu->module in Intel PMU modules · 74545f63
    David Carrillo-Cisneros authored
    The conversion of Intel PMU drivers into modules did not include reference
    counting. The machine will crash when attempting to  access deleted code
    if an event from a module PMU is started and the module removed before the
    event is destroyed.
    
    i.e. this crashes the machine:
    
    	$ insmod intel-rapl-perf.ko
    	$ perf stat -e power/energy-cores/ -C 0 &
    	$ rmmod intel-rapl-perf.ko
    
    Set THIS_MODULE to pmu->module in Intel module PMUs so that generic code
    can handle reference counting and deny rmmod while an event still exists.
    Signed-off-by: default avatarDavid Carrillo-Cisneros <davidcc@google.com>
    Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
    Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
    Cc: Borislav Petkov <bp@suse.de>
    Cc: Dave Hansen <dave.hansen@linux.intel.com>
    Cc: Jiri Olsa <jolsa@redhat.com>
    Cc: Kan Liang <kan.liang@intel.com>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Paul Turner <pjt@google.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
    Cc: Stephane Eranian <eranian@google.com>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Link: http://lkml.kernel.org/r/1482455860-116269-1-git-send-email-davidcc@google.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
    74545f63
uncore.c 34.6 KB