perf record: Use struct perf_mmap and helpers

Paving the way to using perf_evsel->mmap, do this to reduce the patch
noise in the next ones.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 4 insertions, 21 deletions

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index ec43f2eb7b72..d89e2f106a62 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -78,26 +78,9 @@ static off_t			post_processing_offset;
 static struct perf_session      *session;
 static const char               *cpu_list;
 
-struct mmap_data {
-        void                    *base;
-        unsigned int            mask;
-        unsigned int            prev;
-};
-
-static struct mmap_data         mmap_array[MAX_NR_CPUS];
-
-static unsigned long mmap_read_head(struct mmap_data *md)
-{
-        struct perf_event_mmap_page *pc = md->base;
-        long head;
-
-        head = pc->data_head;
-        rmb();
-
-        return head;
-}
+static struct perf_mmap         mmap_array[MAX_NR_CPUS];
 
-static void mmap_write_tail(struct mmap_data *md, unsigned long tail)
+static void mmap_write_tail(struct perf_mmap *md, unsigned long tail)
 {
         struct perf_event_mmap_page *pc = md->base;
 
@@ -136,9 +119,9 @@ static int process_synthesized_event(event_t *event,
         return 0;
 }
 
-static void mmap_read(struct mmap_data *md)
+static void mmap_read(struct perf_mmap *md)
 {
-        unsigned int head = mmap_read_head(md);
+        unsigned int head = perf_mmap__read_head(md);
         unsigned int old = md->prev;
         unsigned char *data = md->base + page_size;
         unsigned long size;