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    Subject[PATCH v2 4/5] kfence: use error_report_start and error_report_end tracepoints
    From
    Make it possible to trace KFENCE error reporting (in particular, for
    compatibility with CONFIG_ERROR_REPORT_NOTIFY).

    Suggested-by: Marco Elver <elver@google.com>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Cc: Andrey Konovalov <andreyknvl@google.com>
    Cc: Dmitry Vyukov <dvyukov@google.com>
    Cc: Ingo Molnar <mingo@redhat.com>
    Cc: Marco Elver <elver@google.com>
    Cc: Petr Mladek <pmladek@suse.com>
    Cc: Steven Rostedt <rostedt@goodmis.org>
    Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
    Cc: linux-mm@kvack.org
    Signed-off-by: Alexander Potapenko <glider@google.com>

    ---
    v2:
    - change error_report_start and error_report_end prototypes
    to accept enum error_detector instead of char*
    (as suggested by Steven Rostedt)
    ---
    mm/kfence/report.c | 3 +++
    1 file changed, 3 insertions(+)

    diff --git a/mm/kfence/report.c b/mm/kfence/report.c
    index 4dedc2ff8f28..bbe7dad5f249 100644
    --- a/mm/kfence/report.c
    +++ b/mm/kfence/report.c
    @@ -9,6 +9,7 @@
    #include <linux/seq_file.h>
    #include <linux/stacktrace.h>
    #include <linux/string.h>
    +#include <trace/events/error_report.h>

    #include <asm/kfence.h>

    @@ -184,6 +185,7 @@ void kfence_report_error(unsigned long address, struct pt_regs *regs,
    lockdep_off();

    pr_err("==================================================================\n");
    + trace_error_report_start(ERROR_DETECTOR_KFENCE, address);
    /* Print report header. */
    switch (type) {
    case KFENCE_ERROR_OOB: {
    @@ -232,6 +234,7 @@ void kfence_report_error(unsigned long address, struct pt_regs *regs,
    show_regs(regs);
    else
    dump_stack_print_info(KERN_ERR);
    + trace_error_report_end(ERROR_DETECTOR_KFENCE, address);
    pr_err("==================================================================\n");

    lockdep_on();
    --
    2.30.0.284.gd98b1dd5eaa7-goog
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