Commit 2378a191 authored by Michal Koutný's avatar Michal Koutný Committed by Steven Rostedt (Google)
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tracing: Ensure optimized hashing works 

If ever PID_MAX_DEFAULT changes, it must be compatible with tracing
hashmaps assumptions.

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://lore.kernel.org/20250924113810.2433478-1-mkoutny@suse.com
Link: https://lore.kernel.org/r/20240409110126.651e94cb@gandalf.local.home/


Signed-off-by: default avatarMichal Koutný <mkoutny@suse.com>
Signed-off-by: default avatarSteven Rostedt (Google) <rostedt@goodmis.org>
parent 4099b982

kernel/trace/trace_sched_switch.c

+2 −0
Original line number Diff line number Diff line
@@ -247,6 +247,8 @@ int trace_save_cmdline(struct task_struct *tsk) 
	if (!tsk->pid)

		return 1;



	BUILD_BUG_ON(!is_power_of_2(PID_MAX_DEFAULT));



	tpid = tsk->pid & (PID_MAX_DEFAULT - 1);



	/*