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/linux-6.1.9/tools/testing/selftests/powerpc/pmu/sampling_tests/
Dmisc.c204 struct perf_event_mmap_page *metadata_page = sample_buff; in __event_read_samples() local
215 data_head = metadata_page->data_head; in __event_read_samples()
218 data_tail = metadata_page->data_tail; in __event_read_samples()
244 if ((metadata_page->data_tail + *size) > metadata_page->data_head) in __event_read_samples()
245 data_tail = metadata_page->data_head; in __event_read_samples()