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    Subject[tip:perf/core] perf unwind: Change fixed name of libunwind__arch_reg_id to macro
    Commit-ID:  eeb118c5d77878948e09308afe4fd9d0efe68ef7
    Gitweb: http://git.kernel.org/tip/eeb118c5d77878948e09308afe4fd9d0efe68ef7
    Author: He Kuang <hekuang@huawei.com>
    AuthorDate: Fri, 3 Jun 2016 03:33:20 +0000
    Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
    CommitDate: Tue, 7 Jun 2016 15:11:46 -0300

    perf unwind: Change fixed name of libunwind__arch_reg_id to macro

    For local libunwind, it uses the fixed methods to convert register id
    according to the host platform, but in remote libunwind, this convert
    function should be the one for remote architecture. This patch changes
    the fixed name to macro and code for each remote platform can be
    compiled indivadually.

    Signed-off-by: He Kuang <hekuang@huawei.com>
    Acked-by: Jiri Olsa <jolsa@kernel.org>
    Cc: Adrian Hunter <adrian.hunter@intel.com>
    Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
    Cc: Andi Kleen <ak@linux.intel.com>
    Cc: David Ahern <dsahern@gmail.com>
    Cc: Ekaterina Tumanova <tumanova@linux.vnet.ibm.com>
    Cc: Josh Poimboeuf <jpoimboe@redhat.com>
    Cc: Kan Liang <kan.liang@intel.com>
    Cc: Masami Hiramatsu <mhiramat@kernel.org>
    Cc: Namhyung Kim <namhyung@kernel.org>
    Cc: Pekka Enberg <penberg@kernel.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Stephane Eranian <eranian@google.com>
    Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
    Cc: Wang Nan <wangnan0@huawei.com>
    Link: http://lkml.kernel.org/r/1464924803-22214-12-git-send-email-hekuang@huawei.com
    Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
    ---
    tools/perf/util/unwind-libunwind-local.c | 2 +-
    tools/perf/util/unwind.h | 5 ++++-
    2 files changed, 5 insertions(+), 2 deletions(-)

    diff --git a/tools/perf/util/unwind-libunwind-local.c b/tools/perf/util/unwind-libunwind-local.c
    index 9c70486..631b40d 100644
    --- a/tools/perf/util/unwind-libunwind-local.c
    +++ b/tools/perf/util/unwind-libunwind-local.c
    @@ -508,7 +508,7 @@ static int access_reg(unw_addr_space_t __maybe_unused as,
    return 0;
    }

    - id = libunwind__arch_reg_id(regnum);
    + id = LIBUNWIND__ARCH_REG_ID(regnum);
    if (id < 0)
    return -EINVAL;

    diff --git a/tools/perf/util/unwind.h b/tools/perf/util/unwind.h
    index bf9f593..b074662 100644
    --- a/tools/perf/util/unwind.h
    +++ b/tools/perf/util/unwind.h
    @@ -29,7 +29,10 @@ int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
    struct perf_sample *data, int max_stack);
    /* libunwind specific */
    #ifdef HAVE_LIBUNWIND_SUPPORT
    -int libunwind__arch_reg_id(int regnum);
    +#ifndef LIBUNWIND__ARCH_REG_ID
    +#define LIBUNWIND__ARCH_REG_ID(regnum) libunwind__arch_reg_id(regnum)
    +#endif
    +int LIBUNWIND__ARCH_REG_ID(int regnum);
    int unwind__prepare_access(struct thread *thread, struct map *map);
    void unwind__flush_access(struct thread *thread);
    void unwind__finish_access(struct thread *thread);
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