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kernel: remove some debugging cruft from taslock.c

Only keep the data structures for LOCKCYCLES when
LOCKCYCLES is actually defined (saves 2K in data segment).

Remove unused dumplockmem() function.

--- a/sys/src/9/port/taslock.c

+++ b/sys/src/9/port/taslock.c

@@ -6,6 +6,7 @@

 #include "../port/error.h"

 #include "edf.h"

+#ifdef LOCKCYCLES

 long maxlockcycles;

 long maxilockcycles;

 long cumlockcycles;

@@ -12,6 +13,8 @@

 long cumilockcycles;

 uintptr maxlockpc;

 uintptr maxilockpc;

+uintptr ilockpcs[0x100] = { [0xff] = 1 };

+#endif

 struct

 {

@@ -20,19 +23,6 @@

 	ulong	inglare;

 } lockstats;

-static void

-dumplockmem(char *tag, Lock *l)

-{

-	uchar *cp;

-	int i;

-

-	iprint("%s: ", tag);

-	cp = (uchar*)l;

-	for(i = 0; i < 64; i++)

-		iprint("%2.2ux ", cp[i]);

-	iprint("\n");

-}

-

 void

 lockloop(Lock *l, uintptr pc)

 {

@@ -213,9 +203,6 @@

 		sched();

 }

-uintptr ilockpcs[0x100] = { [0xff] = 1 };

-static int n;

-

 void

 iunlock(Lock *l)

 {

@@ -222,6 +209,7 @@

 	ulong sr;

 #ifdef LOCKCYCLES

+	static uint n;

 	l->lockcycles += lcycles();

 	cumilockcycles += l->lockcycles;

 	if(l->lockcycles > maxilockcycles){

@@ -229,7 +217,7 @@

 		maxilockpc = l->pc;

 	}

 	if(l->lockcycles > 2400)

-		ilockpcs[n++ & 0xff]  = l->pc;

+		ilockpcs[n++ % nelem(ilockpcs)]  = l->pc;

 #endif

 	if(l->key == 0)

 		print("iunlock(%#p): not locked: pc %#p\n", l, getcallerpc(&l));

-- 

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