diff -Naur linux-0.01-rm-2.0/fs/bitmap.c linux-0.01-rm-2.1/fs/bitmap.c
--- linux-0.01-rm-2.0/fs/bitmap.c	2007-11-26 20:56:34.000000000 +0100
+++ linux-0.01-rm-2.1/fs/bitmap.c	2007-11-30 23:37:55.000000000 +0100
@@ -74,7 +74,7 @@
 		panic("trying to get new block from nonexistant device");
 	j = 8192;
 	for (i=0 ; i<8 ; i++)
-		if (bh=sb->s_zmap[i])
+		if ((bh=sb->s_zmap[i]))
 			if ((j=find_first_zero(bh->b_data))<8192)
 				break;
 	if (i>=8 || !bh || j>=8192)
@@ -138,7 +138,7 @@
 		panic("new_inode with unknown device");
 	j = 8192;
 	for (i=0 ; i<8 ; i++)
-		if (bh=sb->s_imap[i])
+		if ((bh=sb->s_imap[i]))
 			if ((j=find_first_zero(bh->b_data))<8192)
 				break;
 	if (!bh || j >= 8192 || j+i*8192 > sb->s_ninodes) {
diff -Naur linux-0.01-rm-2.0/fs/block_dev.c linux-0.01-rm-2.1/fs/block_dev.c
--- linux-0.01-rm-2.0/fs/block_dev.c	2007-11-25 22:07:55.000000000 +0100
+++ linux-0.01-rm-2.1/fs/block_dev.c	2007-11-30 23:26:29.000000000 +0100
@@ -77,7 +77,7 @@
 
 void ll_rw_block(int rw, struct buffer_head * bh)
 {
-	blk_fn blk_addr;
+	blk_fn blk_addr=NULL;
 	unsigned int major;
 
 	if ((major=MAJOR(bh->b_dev)) >= NR_BLK_DEV || !(blk_addr=rd_blk[major]))
diff -Naur linux-0.01-rm-2.0/fs/buffer.c linux-0.01-rm-2.1/fs/buffer.c
--- linux-0.01-rm-2.0/fs/buffer.c	2007-11-25 22:07:55.000000000 +0100
+++ linux-0.01-rm-2.1/fs/buffer.c	2007-11-30 23:24:40.000000000 +0100
@@ -146,7 +146,7 @@
 	struct buffer_head * tmp;
 
 repeat:
-	if (tmp=get_hash_table(dev,block))
+	if ((tmp=get_hash_table(dev,block)))
 		return tmp;
 	tmp = free_list;
 	do {
diff -Naur linux-0.01-rm-2.0/fs/char_dev.c linux-0.01-rm-2.1/fs/char_dev.c
--- linux-0.01-rm-2.0/fs/char_dev.c	2007-11-25 22:07:55.000000000 +0100
+++ linux-0.01-rm-2.1/fs/char_dev.c	2007-11-30 23:40:54.000000000 +0100
@@ -9,7 +9,7 @@
 static int rw_ttyx(int rw,unsigned minor,char * buf,int count);
 static int rw_tty(int rw,unsigned minor,char * buf,int count);
 
-typedef (*crw_ptr)(int rw,unsigned minor,char * buf,int count);
+typedef int (*crw_ptr)(int rw,unsigned minor,char * buf,int count);
 
 #define NRDEVS ((sizeof (crw_table))/(sizeof (crw_ptr)))
 
diff -Naur linux-0.01-rm-2.0/fs/exec.c linux-0.01-rm-2.1/fs/exec.c
--- linux-0.01-rm-2.0/fs/exec.c	2007-12-25 10:13:01.000000000 +0100
+++ linux-0.01-rm-2.1/fs/exec.c	2007-12-25 10:13:48.000000000 +0100
@@ -70,7 +70,7 @@
 		return -1;
 	table = (unsigned short *) ih->b_data;
 	while (size>0) {
-		if (block=*(table++))
+		if ((block=*(table++))) {
 			if (!(bh=bread(dev,block))) {
 				brelse(ih);
 				return -1;
@@ -78,6 +78,7 @@
 				cp_block(bh->b_data,offset);
 				brelse(bh);
 			}
+		}
 		size -= BLOCK_SIZE;
 		offset += BLOCK_SIZE;
 	}
@@ -110,6 +111,7 @@
 		    BLOCK_SIZE*(518+count))) || (size -= BLOCK_SIZE*512)<=0)
 			return i;
 	panic("Impossibly long executable");
+	return -1;
 }
 
 /*
@@ -151,7 +153,7 @@
 	int i=0;
 	char ** tmp;
 
-	if (tmp = argv)
+	if ((tmp = argv))
 		while (get_fs_long((unsigned long *) (tmp++)))
 			i++;
 
diff -Naur linux-0.01-rm-2.0/fs/file_dev.c linux-0.01-rm-2.1/fs/file_dev.c
--- linux-0.01-rm-2.0/fs/file_dev.c	2007-11-25 22:07:55.000000000 +0100
+++ linux-0.01-rm-2.1/fs/file_dev.c	2007-11-30 23:41:30.000000000 +0100
@@ -16,7 +16,7 @@
 	if ((left=count)<=0)
 		return 0;
 	while (left) {
-		if (nr = bmap(inode,(filp->f_pos)/BLOCK_SIZE)) {
+		if ((nr = bmap(inode,(filp->f_pos)/BLOCK_SIZE))) {
 			if (!(bh=bread(inode->i_dev,nr)))
 				break;
 		} else
diff -Naur linux-0.01-rm-2.0/fs/inode.c linux-0.01-rm-2.1/fs/inode.c
--- linux-0.01-rm-2.0/fs/inode.c	2007-11-25 22:07:55.000000000 +0100
+++ linux-0.01-rm-2.1/fs/inode.c	2007-11-30 23:24:04.000000000 +0100
@@ -57,7 +57,7 @@
 		panic("_bmap: block>big");
 	if (block<7) {
 		if (create && !inode->i_zone[block])
-			if (inode->i_zone[block]=new_block(inode->i_dev)) {
+			if ((inode->i_zone[block]=new_block(inode->i_dev))) {
 				inode->i_ctime=CURRENT_TIME;
 				inode->i_dirt=1;
 			}
@@ -66,7 +66,7 @@
 	block -= 7;
 	if (block<512) {
 		if (create && !inode->i_zone[7])
-			if (inode->i_zone[7]=new_block(inode->i_dev)) {
+			if ((inode->i_zone[7]=new_block(inode->i_dev))) {
 				inode->i_dirt=1;
 				inode->i_ctime=CURRENT_TIME;
 			}
@@ -76,7 +76,7 @@
 			return 0;
 		i = ((unsigned short *) (bh->b_data))[block];
 		if (create && !i)
-			if (i=new_block(inode->i_dev)) {
+			if ((i=new_block(inode->i_dev))) {
 				((unsigned short *) (bh->b_data))[block]=i;
 				bh->b_dirt=1;
 			}
@@ -85,7 +85,7 @@
 	}
 	block -= 512;
 	if (create && !inode->i_zone[8])
-		if (inode->i_zone[8]=new_block(inode->i_dev)) {
+		if ((inode->i_zone[8]=new_block(inode->i_dev))) {
 			inode->i_dirt=1;
 			inode->i_ctime=CURRENT_TIME;
 		}
@@ -95,7 +95,7 @@
 		return 0;
 	i = ((unsigned short *)bh->b_data)[block>>9];
 	if (create && !i)
-		if (i=new_block(inode->i_dev)) {
+		if ((i=new_block(inode->i_dev))) {
 			((unsigned short *) (bh->b_data))[block>>9]=i;
 			bh->b_dirt=1;
 		}
@@ -106,7 +106,7 @@
 		return 0;
 	i = ((unsigned short *)bh->b_data)[block&511];
 	if (create && !i)
-		if (i=new_block(inode->i_dev)) {
+		if ((i=new_block(inode->i_dev))) {
 			((unsigned short *) (bh->b_data))[block&511]=i;
 			bh->b_dirt=1;
 		}
diff -Naur linux-0.01-rm-2.0/fs/namei.c linux-0.01-rm-2.1/fs/namei.c
--- linux-0.01-rm-2.0/fs/namei.c	2007-11-27 21:13:03.000000000 +0100
+++ linux-0.01-rm-2.1/fs/namei.c	2007-11-30 23:38:16.000000000 +0100
@@ -255,7 +255,7 @@
 	if (!(dir = get_dir(pathname)))
 		return NULL;
 	basename = pathname;
-	while (c=get_fs_byte(pathname++))
+	while ((c=get_fs_byte(pathname++)))
 		if (c=='/')
 			basename=pathname;
 	*namelen = pathname-basename-1;
diff -Naur linux-0.01-rm-2.0/fs/open.c linux-0.01-rm-2.1/fs/open.c
--- linux-0.01-rm-2.0/fs/open.c	2007-11-25 22:07:55.000000000 +0100
+++ linux-0.01-rm-2.1/fs/open.c	2007-11-30 23:22:49.000000000 +0100
@@ -39,11 +39,12 @@
 		return -EACCES;
 	res = inode->i_mode & 0777;
 	iput(inode);
-	if (!(current->euid && current->uid))
+	if (!(current->euid && current->uid)) {
 		if (res & 0111)
 			res = 0777;
 		else
 			res = 0666;
+	}
 	if (current->euid == inode->i_uid)
 		res >>= 6;
 	else if (current->egid == inode->i_gid)
@@ -89,12 +90,13 @@
 
 	if (!(inode=namei(filename)))
 		return -ENOENT;
-	if (current->uid && current->euid)
+	if (current->uid && current->euid) {
 		if (current->uid!=inode->i_uid && current->euid!=inode->i_uid) {
 			iput(inode);
 			return -EACCES;
 		} else 
 			mode = (mode & 0777) | (inode->i_mode & 07000);
+	}
 	inode->i_mode = (mode & 07777) | (inode->i_mode & ~07777);
 	inode->i_dirt = 1;
 	iput(inode);
@@ -143,7 +145,7 @@
 		return i;
 	}
 /* ttys are somewhat special (ttyxx major==4, tty major==5) */
-	if (S_ISCHR(inode->i_mode))
+	if (S_ISCHR(inode->i_mode)) {
 		if (MAJOR(inode->i_zone[0])==4) {
 			if (current->leader && current->tty<0) {
 				current->tty = MINOR(inode->i_zone[0]);
@@ -156,6 +158,7 @@
 				f->f_count=0;
 				return -EPERM;
 			}
+	}
 	f->f_mode = inode->i_mode;
 	f->f_flags = flag;
 	f->f_count = 1;
diff -Naur linux-0.01-rm-2.0/fs/super.c linux-0.01-rm-2.1/fs/super.c
--- linux-0.01-rm-2.0/fs/super.c	2007-11-26 20:50:42.000000000 +0100
+++ linux-0.01-rm-2.1/fs/super.c	2007-11-30 23:25:08.000000000 +0100
@@ -39,12 +39,12 @@
 		p->s_zmap[i] = NULL;
 	block=2;
 	for (i=0 ; i < p->s_imap_blocks ; i++)
-		if (p->s_imap[i]=bread(dev,block))
+		if ((p->s_imap[i]=bread(dev,block)))
 			block++;
 		else
 			break;
 	for (i=0 ; i < p->s_zmap_blocks ; i++)
-		if (p->s_zmap[i]=bread(dev,block))
+		if ((p->s_zmap[i]=bread(dev,block)))
 			block++;
 		else
 			break;
diff -Naur linux-0.01-rm-2.0/fs/truncate.c linux-0.01-rm-2.1/fs/truncate.c
--- linux-0.01-rm-2.0/fs/truncate.c	2007-11-25 22:07:55.000000000 +0100
+++ linux-0.01-rm-2.1/fs/truncate.c	2007-11-30 22:46:23.000000000 +0100
@@ -10,7 +10,7 @@
 
 	if (!block)
 		return;
-	if (bh=bread(dev,block)) {
+	if ((bh=bread(dev,block))) {
 		p = (unsigned short *) bh->b_data;
 		for (i=0;i<512;i++,p++)
 			if (*p)
@@ -28,7 +28,7 @@
 
 	if (!block)
 		return;
-	if (bh=bread(dev,block)) {
+	if ((bh=bread(dev,block))) {
 		p = (unsigned short *) bh->b_data;
 		for (i=0;i<512;i++,p++)
 			if (*p)
diff -Naur linux-0.01-rm-2.0/include/ctype.h linux-0.01-rm-2.1/include/ctype.h
--- linux-0.01-rm-2.0/include/ctype.h	2007-11-25 22:07:55.000000000 +0100
+++ linux-0.01-rm-2.1/include/ctype.h	2007-11-30 23:18:57.000000000 +0100
@@ -11,7 +11,7 @@
 #define _SP	0x80	/* hard space (0x20) */
 
 extern unsigned char _ctype[];
-extern char _ctmp;
+extern signed char _ctmp;
 
 #define isalnum(c) ((_ctype+1)[c]&(_U|_L|_D))
 #define isalpha(c) ((_ctype+1)[c]&(_U|_L))
diff -Naur linux-0.01-rm-2.0/init/main.c linux-0.01-rm-2.1/init/main.c
--- linux-0.01-rm-2.0/init/main.c	2007-12-23 18:20:44.000000000 +0100
+++ linux-0.01-rm-2.1/init/main.c	2007-12-07 14:27:36.000000000 +0100
@@ -76,7 +76,7 @@
 	startup_time = kernel_mktime(&time);
 }
 
-void main(void)		/* This really IS void, no error here. */
+int main(void)		/* This really IS void, no error here. */
 {			/* The startup routine assumes (well, ...) this */
 /*
  * Interrupts are still disabled. Do necessary setups, then
@@ -101,6 +101,8 @@
  * task can run, and if not we return here.
  */
 	for(;;) pause();
+
+	return 0;
 }
 
 static int printf(const char *fmt, ...)
diff -Naur linux-0.01-rm-2.0/kernel/fork.c linux-0.01-rm-2.1/kernel/fork.c
--- linux-0.01-rm-2.0/kernel/fork.c	2007-11-25 22:07:55.000000000 +0100
+++ linux-0.01-rm-2.1/kernel/fork.c	2007-11-30 22:49:56.000000000 +0100
@@ -109,7 +109,7 @@
 		return -EAGAIN;
 	}
 	for (i=0; i<NR_OPEN;i++)
-		if (f=p->filp[i])
+		if ((f=p->filp[i]))
 			f->f_count++;
 	if (current->pwd)
 		current->pwd->i_count++;
diff -Naur linux-0.01-rm-2.0/kernel/hd.c linux-0.01-rm-2.1/kernel/hd.c
--- linux-0.01-rm-2.0/kernel/hd.c	2007-12-23 18:52:56.000000000 +0100
+++ linux-0.01-rm-2.1/kernel/hd.c	2007-11-30 23:13:11.000000000 +0100
@@ -50,9 +50,9 @@
 } request[NR_REQUEST];
 
 #define IN_ORDER(s1,s2) \
-((s1)->hd<(s2)->hd || (s1)->hd==(s2)->hd && \
-((s1)->cyl<(s2)->cyl || (s1)->cyl==(s2)->cyl && \
-((s1)->head<(s2)->head || (s1)->head==(s2)->head && \
+(((s1)->hd<(s2)->hd || (s1)->hd==(s2)->hd) && \
+(((s1)->cyl<(s2)->cyl || (s1)->cyl==(s2)->cyl) && \
+(((s1)->head<(s2)->head || (s1)->head==(s2)->head) && \
 ((s1)->sector<(s2)->sector))))
 
 static struct hd_request * this_request = NULL;
@@ -205,7 +205,7 @@
 			break;
 	i = inb(HD_STATUS);
 	i &= BUSY_STAT | READY_STAT | SEEK_STAT;
-	if (i == READY_STAT | SEEK_STAT)
+	if (i == (READY_STAT | SEEK_STAT))
 		return(0);
 	printk("HD controller times out\n\r");
 	return(1);
diff -Naur linux-0.01-rm-2.0/kernel/printk.c linux-0.01-rm-2.1/kernel/printk.c
--- linux-0.01-rm-2.0/kernel/printk.c	2007-11-26 21:48:24.000000000 +0100
+++ linux-0.01-rm-2.1/kernel/printk.c	2007-11-30 22:49:21.000000000 +0100
@@ -8,6 +8,7 @@
 
 #include <linux/kernel.h>
 
+extern int vsprintf();
 static char buf[1024];
 
 int printk(const char *fmt, ...)
diff -Naur linux-0.01-rm-2.0/kernel/tty_io.c linux-0.01-rm-2.1/kernel/tty_io.c
--- linux-0.01-rm-2.0/kernel/tty_io.c	2007-11-25 22:07:55.000000000 +0100
+++ linux-0.01-rm-2.1/kernel/tty_io.c	2007-11-30 23:09:30.000000000 +0100
@@ -206,7 +206,7 @@
 	minimum = (unsigned) tty->termios.c_cc[VMIN];
 	if (time && !minimum) {
 		minimum=1;
-		if (flag=(!oldalarm || time+jiffies<oldalarm))
+		if ((flag=(!oldalarm || time+jiffies<oldalarm)))
 			current->alarm = time+jiffies;
 	}
 	if (minimum>nr)
@@ -235,11 +235,12 @@
 					break;
 			}
 		} while (nr>0 && !EMPTY(tty->secondary));
-		if (time && !L_CANON(tty))
-			if (flag=(!oldalarm || time+jiffies<oldalarm))
+		if (time && !L_CANON(tty)) {
+			if ((flag=(!oldalarm || time+jiffies<oldalarm)))
 				current->alarm = time+jiffies;
 			else
 				current->alarm = oldalarm;
+		}
 		if (L_CANON(tty)) {
 			if (b-buf)
 				break;
@@ -254,7 +255,7 @@
 
 int tty_write(unsigned channel, char * buf, int nr)
 {
-	static cr_flag=0;
+	static int cr_flag=0;
 	struct tty_struct * tty;
 	char c, *b=buf;
 
diff -Naur linux-0.01-rm-2.0/kernel/vsprintf.c linux-0.01-rm-2.1/kernel/vsprintf.c
--- linux-0.01-rm-2.0/kernel/vsprintf.c	2007-11-25 22:07:55.000000000 +0100
+++ linux-0.01-rm-2.1/kernel/vsprintf.c	2007-11-30 23:03:30.000000000 +0100
@@ -49,9 +49,10 @@
 	} else
 		sign=(type&PLUS) ? '+' : ((type&SPACE) ? ' ' : 0);
 	if (sign) size--;
-	if (type&SPECIAL)
+	if (type&SPECIAL){
 		if (base==16) size -= 2;
 		else if (base==8) size--;
+	}
 	i=0;
 	if (num==0)
 		tmp[i++]='0';
@@ -64,13 +65,14 @@
 			*str++ = ' ';
 	if (sign)
 		*str++ = sign;
-	if (type&SPECIAL)
+	if (type&SPECIAL) {
 		if (base==8)
 			*str++ = '0';
 		else if (base==16) {
 			*str++ = '0';
 			*str++ = digits[33];
 		}
+	}
 	if (!(type&LEFT))
 		while(size-->0)
 			*str++ = c;
diff -Naur linux-0.01-rm-2.0/lib/ctype.c linux-0.01-rm-2.1/lib/ctype.c
--- linux-0.01-rm-2.0/lib/ctype.c	2007-11-25 22:07:55.000000000 +0100
+++ linux-0.01-rm-2.1/lib/ctype.c	2007-11-30 23:19:29.000000000 +0100
@@ -1,6 +1,6 @@
 #include <ctype.h>
 
-char _ctmp;
+signed char _ctmp;
 unsigned char _ctype[] = {0x00,			/* EOF */
 _C,_C,_C,_C,_C,_C,_C,_C,			/* 0-7 */
 _C,_C|_S,_C|_S,_C|_S,_C|_S,_C|_S,_C,_C,		/* 8-15 */
diff -Naur linux-0.01-rm-2.0/mm/memory.c linux-0.01-rm-2.1/mm/memory.c
--- linux-0.01-rm-2.0/mm/memory.c	2007-11-26 20:38:54.000000000 +0100
+++ linux-0.01-rm-2.1/mm/memory.c	2007-11-30 23:21:27.000000000 +0100
@@ -238,7 +238,7 @@
 {
 	unsigned long tmp;
 
-	if (tmp=get_free_page())
+	if ((tmp=get_free_page()))
 		if (put_page(tmp,address))
 			return;
 	do_exit(SIGSEGV);