Forward ported a bunch of fixes from 2.4.

arch/um/Makefile

@@ -11,8 +11,6 @@ include/linux/version.h: arch/$(ARCH)/Makefile
 # EXTRAVERSION...
 MODLIB := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
 
-MAKEBOOT = $(MAKE) -C $(ARCH_DIR)/boot
-
 ifeq ($(CONFIG_DEBUGSYM),y)
 DEBUG = -g
 CFLAGS := $(subst -fomit-frame-pointer,,$(CFLAGS))
@@ -106,11 +104,9 @@ archclean: sysclean
 	find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
 		-o -name '*.gcov' \) -type f -print | xargs rm -f
 	rm -f linux x.i gmon.out $(ARCH_DIR)/link.ld $(GEN_HEADERS)
-	@$(MAKEBOOT) clean
 
 archdep: 
 	for d in $(ARCH_SUBDIRS); do $(MAKE) -C $$d fastdep; done
-	@$(MAKEBOOT) dep
 
 $(SYMLINK_HEADERS):
 	cd $(TOPDIR)/$(dir $@) ; \

arch/um/boot/Makefile

-dep:
-
-clean:

arch/um/drivers/port_user.c

@@ -129,42 +129,6 @@ int port_listen_fd(int port)
 	return(err);
 }
 
-int port_rcv_fd(int fd)
-{
-	int new, n;
-	char buf[CMSG_SPACE(sizeof(new))];
-	struct msghdr msg;
-	struct cmsghdr *cmsg;
-
-	msg.msg_name = NULL;
-	msg.msg_namelen = 0;
-	msg.msg_iov = NULL;
-	msg.msg_iovlen = 0;
-	msg.msg_control = buf;
-	msg.msg_controllen = sizeof(buf);
-	msg.msg_flags = 0;
-
-	n = recvmsg(fd, &msg, 0);
-	if(n < 0){
-		printk("rcv_fd : recvmsg failed - errno = %d\n", errno);
-		return(-1);
-	}
-  
-	cmsg = CMSG_FIRSTHDR(&msg);
-	if(cmsg == NULL){
-		printk("rcv_fd didn't receive anything, error = %d\n", errno);
-		return(-1);
-	}
-	if((cmsg->cmsg_level != SOL_SOCKET) || 
-	   (cmsg->cmsg_type != SCM_RIGHTS)){
-		printk("rcv_fd didn't receive a descriptor\n");
-		return(-1);
-	}
-
-	new = ((int *) CMSG_DATA(cmsg))[0];
-	return(new);
-}
-
 struct port_pre_exec_data {
 	int sock_fd;
 	int pipe_fd;

arch/um/drivers/ubd_user.c

@@ -473,6 +473,8 @@ void do_io(struct io_thread_req *req)
 				    &req->sector_mask) == bit))
 			end++;
 
+		if(end != nsectors)
+			printk("end != nsectors\n");
 		off = req->offset + req->offsets[bit] + 
 			start * req->sectorsize;
 		len = (end - start) * req->sectorsize;

arch/um/drivers/xterm_kern.c

@@ -22,11 +22,13 @@ struct xterm_wait {
 static void xterm_interrupt(int irq, void *data, struct pt_regs *regs)
 {
 	struct xterm_wait *xterm = data;
+	int fd;
 
-	xterm->new_fd = os_rcv_fd(xterm->fd, &xterm->pid);
-	if(xterm->new_fd == -EAGAIN)
+	fd = os_rcv_fd(xterm->fd, &xterm->pid);
+	if(fd == -EAGAIN)
 		return;
 
+	xterm->new_fd = fd;
 	up(&xterm->sem);
 }
 

arch/um/kernel/irq_user.c

@@ -338,6 +338,7 @@ void reactivate_fd(int fd, int irqnum)
 		irq_unlock(flags);
 		return;
 	}
+
 	pollfds[i].fd = irq->fd;
 
 	irq_unlock(flags);

arch/um/kernel/setup.c

-/* 
- * Copyright (C) 2000, 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#include "asm/processor.h"
-
-struct cpuinfo_um boot_cpu_data = { loops_per_jiffy :	0,
-				    ipi_pipe : 		{ -1, -1 } };
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */

arch/um/kernel/tempfile.c

@@ -11,7 +11,8 @@
 #include <sys/param.h>
 #include "init.h"
 
-char *tempdir = NULL;
+/* Modified from create_mem_file and start_debugger */
+static char *tempdir = NULL;
 
 static void __init find_tempdir(void)
 {

arch/um/os-Linux/file.c

@@ -186,6 +186,7 @@ int os_pipe(int *fds, int stream, int close_on_exec)
 
 int os_set_fd_async(int fd, int owner)
 {
+	/* XXX This should do F_GETFL first */
 	if(fcntl(fd, F_SETFL, O_ASYNC | O_NONBLOCK) < 0){
 		printk("os_set_fd_async : failed to set O_ASYNC and "
 		       "O_NONBLOCK on fd # %d, errno = %d\n", fd, errno);