perf kvm stat live: Use fdarray object instead of pollfd

The reason is that we don't need to count the number of file descriptors
because it's already handled in fdarray object.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Milian Wolff <mail@milianw.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1412179229-19466-5-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 4 insertions, 12 deletions

diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index dc7d704735bd..460a4ce9c044 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -896,8 +896,7 @@ static int perf_kvm__handle_stdin(void)
 
 static int kvm_events_live_report(struct perf_kvm_stat *kvm)
 {
-        struct pollfd *pollfds = NULL;
-        int nr_fds, nr_stdin, ret, err = -EINVAL;
+        int nr_stdin, ret, err = -EINVAL;
         struct termios save;
 
         /* live flag must be set first */
@@ -919,9 +918,6 @@ static int kvm_events_live_report(struct perf_kvm_stat *kvm)
         signal(SIGINT, sig_handler);
         signal(SIGTERM, sig_handler);
 
-        /* use pollfds -- need to add timerfd and stdin */
-        nr_fds = kvm->evlist->pollfd.nr;
-
         /* add timer fd */
         if (perf_kvm__timerfd_create(kvm) < 0) {
                 err = -1;
@@ -931,22 +927,18 @@ static int kvm_events_live_report(struct perf_kvm_stat *kvm)
         if (perf_evlist__add_pollfd(kvm->evlist, kvm->timerfd) < 0)
                 goto out;
 
-        nr_fds++;
-
         nr_stdin = perf_evlist__add_pollfd(kvm->evlist, fileno(stdin));
         if (nr_stdin < 0)
                 goto out;
 
-        nr_fds++;
         if (fd_set_nonblock(fileno(stdin)) != 0)
                 goto out;
 
-        pollfds  = kvm->evlist->pollfd.entries;
-
         /* everything is good - enable the events and process */
         perf_evlist__enable(kvm->evlist);
 
         while (!done) {
+                struct fdarray *fda = &kvm->evlist->pollfd;
                 int rc;
 
                 rc = perf_kvm__mmap_read(kvm);
@@ -957,11 +949,11 @@ static int kvm_events_live_report(struct perf_kvm_stat *kvm)
                 if (err)
                         goto out;
 
-                if (pollfds[nr_stdin].revents & POLLIN)
+                if (fda->entries[nr_stdin].revents & POLLIN)
                         done = perf_kvm__handle_stdin();
 
                 if (!rc && !done)
-                        err = poll(pollfds, nr_fds, 100);
+                        err = fdarray__poll(fda, 100);
         }
 
         perf_evlist__disable(kvm->evlist);