perf lock: Add percpu-rwsem for type filter

percpu-rwsem was missing in man page. And for backward compatibility,
replace `pcpu-sem` with `percpu-rwsem` before parsing lock name.
Tested `./perf lock con -ab -Y pcpu-sem` and `./perf lock con -ab -Y
percpu-rwsem`

Fixes: 4f70106 ("perf lock contention: Show lock type with address")
Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Chun-Tse Shao <ctshao@google.com>
Cc: nick.forrington@arm.com
Link: https://lore.kernel.org/r/20250116235838.2769691-2-ctshao@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

Author: Chun-Tse Shao

tools/perf/Documentation/perf-lock.txt

@@ -187,8 +187,8 @@ CONTENTION OPTIONS
 	Show lock contention only for given lock types (comma separated list).
 	Available values are:
 	  semaphore, spinlock, rwlock, rwlock:R, rwlock:W, rwsem, rwsem:R, rwsem:W,
-	  rtmutex, rwlock-rt, rwlock-rt:R, rwlock-rt:W, pcpu-sem, pcpu-sem:R, pcpu-sem:W,
-	  mutex
+	  rtmutex, rwlock-rt, rwlock-rt:R, rwlock-rt:W, percpu-rwmem, pcpu-sem,
+	  pcpu-sem:R, pcpu-sem:W, mutex
 
 	Note that RW-variant of locks have :R and :W suffix.  Names without the
 	suffix are shortcuts for the both variants.  Ex) rwsem = rwsem:R + rwsem:W.

tools/perf/builtin-lock.c

@@ -2271,7 +2271,10 @@ static int parse_lock_type(const struct option *opt __maybe_unused, const char *
 		/*
 		 * Otherwise `tok` is `name` in `lock_type_table`.
 		 * Single lock name could contain multiple flags.
+		 * Replace alias `pcpu-sem` with actual name `percpu-rwsem.
 		 */
+		if (!strcmp(tok, "pcpu-sem"))
+			tok = (char *)"percpu-rwsem";
 		for (unsigned int i = 0; i < ARRAY_SIZE(lock_type_table); i++) {
 			if (!strcmp(lock_type_table[i].name, tok)) {
 				if (add_lock_type(lock_type_table[i].flags)) {