simplify pthread tsd key handling

src/internal/libc.h

@@ -9,7 +9,7 @@ struct __libc {
 	void (*cancelpt)(int);
 	void (*lock)(volatile int *);
 	void (*lockfile)(FILE *);
-	void (**tsd_keys)(void *);
+	void (*fork_handler)(int);
 	void (*sigtimer)();
 	int (*atexit)(void (*)(void));
 	void (*fini)(void);
@@ -17,7 +17,6 @@ struct __libc {
 	volatile int threads_minus_1;
 	int ofl_lock;
 	int (*rsyscall)(int, long, long, long, long, long, long);
-	void (*fork_handler)(int);
 	FILE *ofl_head;
 };
 

src/thread/pthread_key_create.c

@@ -15,7 +15,6 @@ int pthread_key_create(pthread_key_t *k, void (*dtor)(void *))
 	unsigned j = i;
 
 	pthread_self();
-	libc.tsd_keys = keys;
 	if (!dtor) dtor = nodtor;
 	do {
 		if (!a_cas_p(keys+j, 0, dtor)) {
@@ -26,6 +25,12 @@ int pthread_key_create(pthread_key_t *k, void (*dtor)(void *))
 	return EAGAIN;
 }
 
+int pthread_key_delete(pthread_key_t k)
+{
+	keys[k] = 0;
+	return 0;
+}
+
 void __pthread_tsd_run_dtors(pthread_t self)
 {
 	int i, j, not_finished = self->tsd_used;

src/thread/pthread_key_delete.c

@@ -1,7 +0,0 @@
-#include "pthread_impl.h"
-
-int pthread_key_delete(pthread_key_t k)
-{
-	libc.tsd_keys[k] = 0;
-	return 0;
-}