> - int bhrb_users; > + unsigned int bhrb_users;
OK, so this is a good start. A quick git grep for bhrb_users reveals this: perf/core-book3s.c: WARN_ON_ONCE(cpuhw->bhrb_users < 0); That occurs in power_pmu_bhrb_disable, immediately following a decrement of bhrb_users. Now that the test can never be true, this patch should change the function to check if bhrb_users is 0 before decrementing. > void *bhrb_context; > struct perf_branch_stack bhrb_stack; > struct perf_branch_entry bhrb_entries[BHRB_MAX_ENTRIES]; -- Regards, Daniel
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