Forward ported a bunch of cleanups from 2.4. Improved error messages,

slightly different formatting, removal of dead code, and some stray
C99 initializer conversions.

arch/um/drivers/line.c

@@ -35,7 +35,7 @@ void line_timer_cb(void *arg)
 	line_interrupt(dev->driver->read_irq, dev, NULL);
 }
 
-void buffer_data(struct line *line, const char *buf, int len)
+static void buffer_data(struct line *line, const char *buf, int len)
 {
 	int end;
 

arch/um/drivers/port_kern.c

@@ -31,7 +31,6 @@ struct port_list {
 
 struct port_dev {
 	struct port_list *port;
-	int fd;
 	int helper_pid;
 	int telnetd_pid;
 };
@@ -55,7 +54,8 @@ static void pipe_interrupt(int irq, void *data, struct pt_regs *regs)
 		if(fd == -EAGAIN)
 			return;
 
-		printk("os_rcv_fd returned %d\n", -fd);
+		printk(KERN_ERR "pipe_interrupt : os_rcv_fd returned %d\n", 
+		       -fd);
 		os_close_file(conn->fd);
 	}
 
@@ -75,26 +75,29 @@ static int port_accept(struct port_list *port)
 	fd = port_connection(port->fd, socket, &pid);
 	if(fd < 0){
 		if(fd != -EAGAIN)
-			printk("port_connection returned %d\n", -fd);
+			printk(KERN_ERR "port_accept : port_connection "
+			       "returned %d\n", -fd);
 		goto out;
 	}
 
 	conn = kmalloc(sizeof(*conn), GFP_ATOMIC);
 	if(conn == NULL){
-		printk("port_interrupt : failed to allocate connection\n");
+		printk(KERN_ERR "port_accept : failed to allocate "
+		       "connection\n");
 		goto out_close;
 	}
 	*conn = ((struct connection) 
-		{ list :	LIST_HEAD_INIT(conn->list),
-		  fd :		fd,
-		  socket : 	{ socket[0], socket[1] },
-		  telnetd_pid :	pid,
-		  port :	port });
+		{ .list 	= LIST_HEAD_INIT(conn->list),
+		  .fd 		= fd,
+		  .socket  	= { socket[0], socket[1] },
+		  .telnetd_pid 	= pid,
+		  .port 	= port });
 
 	if(um_request_irq(TELNETD_IRQ, socket[0], IRQ_READ, pipe_interrupt, 
 			  SA_INTERRUPT | SA_SHIRQ | SA_SAMPLE_RANDOM, 
 			  "telnetd", conn)){
-		printk(KERN_ERR "Failed to get IRQ for telnetd\n");
+		printk(KERN_ERR "port_accept : failed to get IRQ for "
+		       "telnetd\n");
 		goto out_free;
 	}
 
@@ -106,7 +109,8 @@ static int port_accept(struct port_list *port)
 	kfree(conn);
  out_close:
 	os_close_file(fd);
-	if(pid != -1) os_kill_process(pid, 0);
+	if(pid != -1) 
+		os_kill_process(pid, 0);
  out:
 	return(ret);
 } 
@@ -205,38 +209,16 @@ void *port_data(int port_num)
 	return(dev);
 }
 
-void port_remove_dev(void *d)
-{
-	struct port_dev *dev = d;
-
-  	if(dev->helper_pid != -1)
- 		os_kill_process(dev->helper_pid, 0);
- 	if(dev->telnetd_pid != -1)
- 		os_kill_process(dev->telnetd_pid, 0);
- 	dev->helper_pid = -1;
-}
-
-static void free_port(void)
-{
-	struct list_head *ele;
-	struct port_list *port;
-
-	list_for_each(ele, &ports){
-		port = list_entry(ele, struct port_list, list);
-		os_close_file(port->fd);
-	}
-}
-
-__uml_exitcall(free_port);
-
 int port_wait(void *data)
 {
 	struct port_dev *dev = data;
 	struct connection *conn;
 	struct port_list *port = dev->port;
+	int fd;
 
 	while(1){
-		if(down_interruptible(&port->sem)) return(-ERESTARTSYS);
+		if(down_interruptible(&port->sem))
+			return(-ERESTARTSYS);
 
 		spin_lock(&port->lock);
 
@@ -263,23 +245,48 @@ int port_wait(void *data)
 		kfree(conn);
 	}
 
-	dev->fd = conn->fd;
+	fd = conn->fd;
 	dev->helper_pid = conn->helper_pid;
 	dev->telnetd_pid = conn->telnetd_pid;
 	kfree(conn);
 
-	return(dev->fd);
+	return(fd);
+}
+
+void port_remove_dev(void *d)
+{
+	struct port_dev *dev = d;
+
+	if(dev->helper_pid != -1)
+		os_kill_process(dev->helper_pid, 0);
+	if(dev->telnetd_pid != -1)
+		os_kill_process(dev->telnetd_pid, 0);
+	dev->helper_pid = -1;
+	dev->telnetd_pid = -1;
 }
 
 void port_kern_free(void *d)
 {
 	struct port_dev *dev = d;
 
-	if(dev->helper_pid != -1) os_kill_process(dev->telnetd_pid, 0);
-	if(dev->telnetd_pid != -1) os_kill_process(dev->telnetd_pid, 0);
+	port_remove_dev(dev);
 	kfree(dev);
 }
 
+static void free_port(void)
+{
+	struct list_head *ele;
+	struct port_list *port;
+
+	list_for_each(ele, &ports){
+		port = list_entry(ele, struct port_list, list);
+		free_irq_by_fd(port->fd);
+		os_close_file(port->fd);
+	}
+}
+
+__uml_exitcall(free_port);
+
 /*
  * Overrides for Emacs so that we follow Linus's tabbing style.
  * Emacs will notice this stuff at the end of the file and automatically

arch/um/drivers/port_user.c

@@ -47,14 +47,28 @@ void *port_init(char *str, int device, struct chan_opts *opts)
 		return(NULL);
 	}
 
-	if((kern_data = port_data(port)) == NULL) return(NULL);
+	if((kern_data = port_data(port)) == NULL) 
+		return(NULL);
+
+	if((data = um_kmalloc(sizeof(*data))) == NULL) 
+		goto err;
 
-	if((data = um_kmalloc(sizeof(*data))) == NULL) return(NULL);
-	*data = ((struct port_chan) { raw : 		opts->raw,
-				      kernel_data :	kern_data });
+	*data = ((struct port_chan) { .raw  		= opts->raw,
+				      .kernel_data 	= kern_data });
 	sprintf(data->dev, "%d", port);
 
 	return(data);
+ err:
+	port_kern_free(kern_data);
+	return(NULL);
+}
+
+void port_free(void *d)
+{
+	struct port_chan *data = d;
+
+	port_kern_free(data->kernel_data);
+	kfree(data);
 }
 
 int port_open(int input, int output, int primary, void *d, char **dev_out)
@@ -86,25 +100,17 @@ int port_console_write(int fd, const char *buf, int n, void *d)
 	return(generic_console_write(fd, buf, n, &data->tt));
 }
 
-void port_free(void *d)
-{
-	struct port_chan *data = d;
-
-	port_kern_free(data->kernel_data);
-	kfree(data);
-}
-
 struct chan_ops port_ops = {
-	type:		"port",
-	init:		port_init,
-	open:		port_open,
-	close:		port_close,
-	read:	        generic_read,
-	write:		generic_write,
-	console_write:	port_console_write,
-	window_size:	generic_window_size,
-	free:		port_free,
-	winch:		1,
+	.type		= "port",
+	.init		= port_init,
+	.open		= port_open,
+	.close		= port_close,
+	.read	        = generic_read,
+	.write		= generic_write,
+	.console_write	= port_console_write,
+	.window_size	= generic_window_size,
+	.free		= port_free,
+	.winch		= 1,
 };
 
 int port_listen_fd(int port)
@@ -113,7 +119,8 @@ int port_listen_fd(int port)
 	int fd, err;
 
 	fd = socket(PF_INET, SOCK_STREAM, 0);
-	if(fd == -1) return(-errno);
+	if(fd == -1) 
+		return(-errno);
 
 	addr.sin_family = AF_INET;
 	addr.sin_port = htons(port);
@@ -163,14 +170,16 @@ int port_connection(int fd, int *socket, int *pid_out)
 		return(-errno);
 
 	err = os_pipe(socket, 0, 0);
-	if(err) goto out_close;
+	if(err) 
+		goto out_close;
 
 	data = ((struct port_pre_exec_data)
-		{ sock_fd : 		new,
-		  pipe_fd :		socket[1] });
+		{ .sock_fd  		= new,
+		  .pipe_fd 		= socket[1] });
 
 	err = run_helper(port_pre_exec, &data, argv, NULL);
-	if(err < 0) goto out_shutdown;
+	if(err < 0) 
+		goto out_shutdown;
 
 	*pid_out = err;
 	return(new);

arch/um/drivers/pty.c

 /* 
- * Copyright (C) 2001 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
  * Licensed under the GPL
  */
 
@@ -86,34 +86,15 @@ int getmaster(char *line)
 	return(-1);
 }
 
-struct grantpt_info {
-	int fd;
-	int res;
-	int err;
-};
-
-static void grantpt_cb(void *arg)
-{
-	struct grantpt_info *info = arg;
-
-	info->res = grantpt(info->fd);
-	info->err = errno;
-}
-
 int pty_open(int input, int output, int primary, void *d, char **dev_out)
 {
 	struct pty_chan *data = d;
 	int fd;
 	char dev[sizeof("/dev/ptyxx\0")] = "/dev/ptyxx";
-	struct grantpt_info info;
 
 	fd = getmaster(dev);
 	if(fd < 0) return(-errno);
 	
-	info.fd = fd;
-	initial_thread_cb(grantpt_cb, &info);
-	unlockpt(fd);
-
 	if(data->raw) raw(fd, 0);
 	if(data->announce) (*data->announce)(dev, data->dev);
 

arch/um/include/signal_kern.h

 /* 
- * Copyright (C) 2001 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
  * Licensed under the GPL
  */
 
 #ifndef __SIGNAL_KERN_H__
 #define __SIGNAL_KERN_H__
 
-#include "sysdep/ptrace.h"
-
-extern void signal_deliverer(int sig);
-extern int probe_stack(unsigned long sp, int delta);
 extern int have_signals(void *t);
 
 #endif

arch/um/include/umid.h

@@ -3,8 +3,13 @@
  * Licensed under the GPL
  */
 
+#ifndef __UMID_H__
+#define __UMID_H__
+
 extern int umid_file_name(char *name, char *buf, int len);
 
+#endif
+
 /*
  * Overrides for Emacs so that we follow Linus's tabbing style.
  * Emacs will notice this stuff at the end of the file and automatically

arch/um/kernel/frame.c

@@ -78,7 +78,8 @@ static int capture_stack(int (*child)(void *arg), void *arg, void *sp,
 
 	/* It has outlived its usefulness, so continue it so it can exit */
 	if(ptrace(PTRACE_CONT, pid, 0, 0) < 0){
-		printf("capture_stack : mmap failed - errno = %d\n", errno);
+		printf("capture_stack : PTRACE_CONT failed - errno = %d\n", 
+		       errno);
 		exit(1);
 	}
 	if(waitpid(pid, &status, 0) < 0){

arch/um/kernel/ksyms.c

@@ -14,6 +14,7 @@
 #include "asm/processor.h"
 #include "asm/unistd.h"
 #include "asm/pgalloc.h"
+#include "asm/pgtable.h"
 #include "asm/page.h"
 #include "asm/tlbflush.h"
 #include "kern_util.h"
@@ -42,7 +43,11 @@ EXPORT_SYMBOL(page_to_phys);
 EXPORT_SYMBOL(phys_to_page);
 EXPORT_SYMBOL(high_physmem);
 EXPORT_SYMBOL(empty_zero_page);
+EXPORT_SYMBOL(um_virt_to_phys);
+EXPORT_SYMBOL(mode_tt);
+EXPORT_SYMBOL(handle_page_fault);
 
+EXPORT_SYMBOL(os_getpid);
 EXPORT_SYMBOL(os_open_file);
 EXPORT_SYMBOL(os_read_file);
 EXPORT_SYMBOL(os_write_file);

arch/um/kernel/sigio_user.c

@@ -420,7 +420,8 @@ int read_sigio_fd(int fd)
 
 static void sigio_cleanup(void)
 {
-	if(write_sigio_pid != -1) kill(write_sigio_pid, SIGKILL);
+	if(write_sigio_pid != -1)
+		kill(write_sigio_pid, SIGKILL);
 }
 
 __uml_exitcall(sigio_cleanup);

arch/um/kernel/signal_kern.c

@@ -29,18 +29,6 @@
 EXPORT_SYMBOL(block_signals);
 EXPORT_SYMBOL(unblock_signals);
 
-int probe_stack(unsigned long sp, int delta)
-{
-	int n;
-
-	if((get_user(n, (int *) sp) != 0) ||
-	   (put_user(n, (int *) sp) != 0) ||
-	   (get_user(n, (int *) (sp - delta)) != 0) ||
-	   (put_user(n, (int *) (sp - delta)) != 0))
-		return(-EFAULT);
-	return(0);
-}
-
 static void force_segv(int sig)
 {
 	if(sig == SIGSEGV){

arch/um/kernel/skas/include/uaccess.h

@@ -27,9 +27,6 @@ static inline int verify_area_skas(int type, const void * addr,
 	return(access_ok_skas(type, addr, size) ? 0 : -EFAULT);
 }
 
-extern void *um_virt_to_phys(struct task_struct *task, unsigned long virt,
-			     pte_t *pte_out);
-
 static inline unsigned long maybe_map(unsigned long virt, int is_write)
 {
 	pte_t pte;

arch/um/kernel/skas/tlb.c

@@ -99,7 +99,6 @@ static void flush_kernel_vm_range(unsigned long start, unsigned long end)
 				protect_memory(addr, PAGE_SIZE, 1, 1, 1, 1);
 			}
 			addr += PAGE_SIZE;
-
 		}
 		else {
 			if(pmd_newpage(*pmd)){

arch/um/kernel/time.c

@@ -108,7 +108,7 @@ void idle_sleep(int secs)
 
 	ts.tv_sec = secs;
 	ts.tv_nsec = 0;
-	nanosleep(&ts, &ts);
+	nanosleep(&ts, NULL);
 }
 
 /*

arch/um/kernel/trap_kern.c

@@ -109,7 +109,8 @@ unsigned long segv(unsigned long address, unsigned long ip, int is_write,
                 flush_tlb_kernel_vm();
                 return(0);
         }
-        if(current->mm == NULL) panic("Segfault with no mm");
+        if(current->mm == NULL)
+		panic("Segfault with no mm");
 	err = handle_page_fault(address, ip, is_write, is_user, &si.si_code);
 
 	catcher = current->thread.fault_catcher;

arch/um/kernel/tt/gdb_kern.c

@@ -13,9 +13,9 @@ extern int gdb_config(char *str);
 extern int gdb_remove(char *unused);
 
 static struct mc_device gdb_mc = {
-	name:		"gdb",
-	config:		gdb_config,
-	remove:		gdb_remove,
+	.name		= "gdb",
+	.config		= gdb_config,
+	.remove		= gdb_remove,
 };
 
 int gdb_mc_init(void)

arch/um/kernel/um_arch.c

@@ -317,6 +317,11 @@ int linux_main(int argc, char **argv)
 	if(physmem_size > max_physmem){
 		highmem = physmem_size - max_physmem;
 		physmem_size -= highmem;
+#ifndef CONFIG_HIGHMEM
+		highmem = 0;
+		printf("CONFIG_HIGHMEM not enabled - physical memory shrunk "
+		       "to %ld bytes\n", physmem_size);
+#endif
 	}
 
 	high_physmem = uml_physmem + physmem_size;

arch/um/kernel/umid.c

@@ -186,7 +186,6 @@ int not_dead_yet(char *dir)
 	}
 	if(!dead) return(1);
 	return(actually_do_remove(dir));
-	return(0);
 }
 
 static int __init set_uml_dir(char *name, int *add)

arch/um/sys-i386/Makefile

@@ -9,6 +9,7 @@ USER_OBJS := bugs.o ptrace_user.o sigcontext.o fault.o
 USER_OBJS := $(foreach file,$(USER_OBJS),$(obj)/$(file))
 
 SYMLINKS = semaphore.c extable.c highmem.c module.c
+SYMLINKS := $(foreach f,$(SYMLINKS),$(src)/$f)
 
 semaphore.c-dir = kernel
 extable.c-dir = mm
@@ -23,7 +24,7 @@ endef
 $(USER_OBJS) : %.o: %.c
 	$(CC) $(CFLAGS_$(notdir $@)) $(USER_CFLAGS) -c -o $@ $<
 
-$(foreach f,$(SYMLINKS),$(src)/$f): 
+$(SYMLINKS): 
 	$(call make_link,$@)
 
 clean:

include/asm-um/pgtable.h

@@ -14,6 +14,9 @@
 
 extern pgd_t swapper_pg_dir[1024];
 
+extern void *um_virt_to_phys(struct task_struct *task, unsigned long virt,
+			     pte_t *pte_out);
+
 /* zero page used for uninitialized stuff */
 extern unsigned long *empty_zero_page;