ARM: 9480/1: entry: expand comment in __switch_tografted

As per discussion between the developers in the mail thread
linked, expand the comment in __switch_to so that readers
of the code understand what is going on.

Suggested-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Linus Walleij <linusw@kernel.org>>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

1 files changed, 45 insertions, 0 deletions

diff --git a/tools/perf/util/counts.h b/tools/perf/util/counts.h
new file mode 100644
index 000000000..42760242e
--- /dev/null
+++ b/tools/perf/util/counts.h
@@ -0,0 +1,45 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __PERF_COUNTS_H
+#define __PERF_COUNTS_H
+
+#include <linux/types.h>
+#include <internal/xyarray.h>
+#include <perf/evsel.h>
+#include <stdbool.h>
+
+struct evsel;
+
+struct perf_counts {
+	s8			  scaled;
+	struct xyarray		  *values;
+	struct xyarray		  *loaded;
+};
+
+
+static inline struct perf_counts_values*
+perf_counts(struct perf_counts *counts, int cpu_map_idx, int thread)
+{
+	return xyarray__entry(counts->values, cpu_map_idx, thread);
+}
+
+static inline bool
+perf_counts__is_loaded(struct perf_counts *counts, int cpu_map_idx, int thread)
+{
+	return *((bool *) xyarray__entry(counts->loaded, cpu_map_idx, thread));
+}
+
+static inline void
+perf_counts__set_loaded(struct perf_counts *counts, int cpu_map_idx, int thread, bool loaded)
+{
+	*((bool *) xyarray__entry(counts->loaded, cpu_map_idx, thread)) = loaded;
+}
+
+struct perf_counts *perf_counts__new(int ncpus, int nthreads);
+void perf_counts__delete(struct perf_counts *counts);
+void perf_counts__reset(struct perf_counts *counts);
+
+void evsel__reset_counts(struct evsel *evsel);
+int evsel__alloc_counts(struct evsel *evsel);
+void evsel__free_counts(struct evsel *evsel);
+
+#endif /* __PERF_COUNTS_H */