cpu: change _cpu()->thread calls to current_thread() to fix smp race

kernel-src/io/acpi/glue.c

@@ -502,7 +502,7 @@ void uacpi_kernel_reset_event(uacpi_handle sem) {
 }
 
 uacpi_thread_id uacpi_kernel_get_thread_id(void) {
-	return _cpu()->thread;
+	return current_thread();
 }
 
 uacpi_handle uacpi_kernel_create_spinlock(void) {

kernel-src/io/block/nvme.c

@@ -324,7 +324,7 @@ static void enqueueandwait(queuepair_t *queuepair, entrypair_t *entries) {
 
 	*queuepair->submission.doorbell = queuepair->submission.index;
 	sched_preparesleep(false);
-	entries->thread = _cpu()->thread;
+	entries->thread = current_thread();
 	spinlock_release(&queuepair->lock);
 	sched_yield();
 	interrupt_set(intstatus);

kernel-src/io/block/vioblk.c

@@ -88,7 +88,7 @@ static void vioblk_enqueue(vioblkdev_t *blkdev, requestheader_t *headerphys, voi
 	VIO_QUEUE_DRV_RING(&blkdev->queue)[driveridx % blkdev->queue.size] = idx;
 
 	sched_preparesleep(false);
-	blkdev->queuewaiting[idx / 3] = _cpu()->thread;
+	blkdev->queuewaiting[idx / 3] = current_thread();
 
 	++VIO_QUEUE_DRV_IDX(&blkdev->queue);
 	*blkdev->queue.notify = 0;

kernel-src/io/net/localsocket.c

@@ -357,8 +357,8 @@ static int localsock_send(socket_t *socket, sockdesc_t *sockdesc) {
 
 	localsocket_t *peer = pair->client == localsocket ? pair->server : pair->client;
 	if (peer == NULL) {
-		if (_cpu()->thread->proc && (sockdesc->flags & SOCKET_SEND_FLAGS_NOSIGNAL) == 0)
-			signal_signalproc(_cpu()->thread->proc, SIGPIPE);
+		if (current_thread()->proc && (sockdesc->flags & SOCKET_SEND_FLAGS_NOSIGNAL) == 0)
+			signal_signalproc(current_thread()->proc, SIGPIPE);
 
 		error = EPIPE;
 		goto leave;
@@ -873,9 +873,9 @@ static int localsock_bind(socket_t *socket, sockaddr_t *addr, cred_t *cred) {
 
 	refnode = *path == '/' ? sched_getroot() : sched_getcwd();
 	vattr_t attr = {
-		.mode = _cpu()->thread->proc ? UMASK(0777) : 0644,
-		.gid = _cpu()->thread->proc ? _cpu()->thread->proc->cred.gid : 0,
-		.uid = _cpu()->thread->proc ? _cpu()->thread->proc->cred.uid : 0
+		.mode = current_thread()->proc ? UMASK(0777) : 0644,
+		.gid = current_thread()->proc ? current_thread()->proc->cred.gid : 0,
+		.uid = current_thread()->proc ? current_thread()->proc->cred.uid : 0
 	};
 
 	vnode_t *vnode;

kernel-src/io/net/tcp.c

@@ -838,7 +838,7 @@ typedef struct {
 } __attribute__((packed)) synoptions_t;
 
 __attribute__((noreturn)) static void tcp_worker() {
-	tcpworker_t *self = _cpu()->thread->kernelarg;
+	tcpworker_t *self = current_thread()->kernelarg;
 	ipv4pseudoheader_t ipv4;
 	int tasktype;
 	tcb_t *tcb = NULL;
@@ -1254,8 +1254,8 @@ static int tcp_send(socket_t *socket, sockdesc_t *sockdesc) {
 
 	MUTEX_ACQUIRE(&tcb->mutex, false);
 	if (tcb->reset) {
-		if (_cpu()->thread->proc)
-			signal_signalproc(_cpu()->thread->proc, SIGPIPE);
+		if (current_thread()->proc)
+			signal_signalproc(current_thread()->proc, SIGPIPE);
 		error = ECONNRESET;
 		goto leave;
 	}
@@ -1272,8 +1272,8 @@ static int tcp_send(socket_t *socket, sockdesc_t *sockdesc) {
 			poll_leave(&polldesc);
 			poll_destroydesc(&polldesc);
 
-			if (_cpu()->thread->proc && (sockdesc->flags & SOCKET_SEND_FLAGS_NOSIGNAL) == 0)
-				signal_signalproc(_cpu()->thread->proc, SIGPIPE);
+			if (current_thread()->proc && (sockdesc->flags & SOCKET_SEND_FLAGS_NOSIGNAL) == 0)
+				signal_signalproc(current_thread()->proc, SIGPIPE);
 
 			error = EPIPE;
 			goto leave;

kernel-src/io/net/vionet.c

@@ -139,7 +139,7 @@ static int vionet_sendpacket(netdev_t *internal, netdesc_t desc, mac_t targetmac
 	VIO_QUEUE_DRV_RING(&netdev->txqueue)[driveridx % netdev->txqueue.size] = idx;
 
 	sched_preparesleep(false);
-	netdev->txwait[idx] = _cpu()->thread;
+	netdev->txwait[idx] = current_thread();
 	*netdev->txqueue.notify = 0;
 
 	spinlock_release(&netdev->txlock);

kernel-src/io/poll.c

@@ -36,7 +36,7 @@ int poll_initdesc(polldesc_t *desc, size_t size) {
 			return ENOMEM;
 	}
 
-	desc->thread = _cpu()->thread;
+	desc->thread = current_thread();
 	desc->size = size;
 	SPINLOCK_INIT(desc->lock);
 	SPINLOCK_INIT(desc->eventlock);

kernel-src/io/tty.c

@@ -322,7 +322,7 @@ int tty_ioctl(tty_t *tty, unsigned long req, void *arg, int *result, cred_t *cre
 			return USERCOPY_POSSIBLY_FROM_USER(&tty->termios, arg, sizeof(termios_t));
 		case TIOCSCTTY: {
 			// set as controlling tty
-			return jobctl_setctty(_cpu()->thread->proc, tty, (uintptr_t)arg == 1);
+			return jobctl_setctty(current_thread()->proc, tty, (uintptr_t)arg == 1);
 			break;
 		}
 		case TIOCGPGRP: {
@@ -377,7 +377,7 @@ static int open(int minor, vnode_t **vnode, int flags) {
 
 	if (minor == CONTROLLING_TTY_MINOR) {
 		// return controlling tty
-		tty_t *ctty = jobctl_getctty(_cpu()->thread->proc);
+		tty_t *ctty = jobctl_getctty(current_thread()->proc);
 
 		if (ctty == NULL) {
 			return ENXIO;
@@ -389,7 +389,7 @@ static int open(int minor, vnode_t **vnode, int flags) {
 		return ENODEV;
 	} else if ((flags & V_FFLAGS_NOCTTY) == 0) {
 		// set as controlling tty
-		jobctl_setctty(_cpu()->thread->proc, tty, false);
+		jobctl_setctty(current_thread()->proc, tty, false);
 	}
 
 	return 0;
@@ -467,7 +467,7 @@ tty_t *tty_create(char *name, ttydevicewritefn_t writefn, ttyinactivefn_t inacti
 		goto error;
 	}
 
-	if (devfs_register(&devops, name, V_TYPE_CHDEV, DEV_MAJOR_TTY, minor, 0600, _cpu()->thread->proc ? &_cpu()->thread->proc->cred : NULL)) {
+	if (devfs_register(&devops, name, V_TYPE_CHDEV, DEV_MAJOR_TTY, minor, 0600, current_thread()->proc ? &current_thread()->proc->cred : NULL)) {
 		freeminor(minor);
 		ringbuffer_destroy(&tty->readbuffer);
 		goto error;