Import 2.2.8pre6

CREDITS

@@ -256,6 +256,10 @@ W: http://math-www.uni-paderborn.de/~axel/
 D: Configuration help text support
 D: Linux CD and Support Giveaway List
 
+N: Zoltan Boszormenyi
+E: zboszor@mol.hu
+D: MTRR emulation with Cyrix style ARR registers
+
 N: John Boyd
 E: boyd@cis.ohio-state.edu
 D: Co-author of wd7000 SCSI driver

Documentation/Configure.help

@@ -8666,17 +8666,24 @@ CONFIG_FT_FDC_MAX_RATE
 
 MTRR control and configuration
 CONFIG_MTRR
-  On Intel Pentium Pro and Pentium II systems the Memory Type Range
-  Registers (MTRRs) may be used to control processor access to memory
-  ranges. This is most useful when you have a video (VGA) card on a
-  PCI or AGP bus. Enabling write-combining allows bus write transfers
-  to be combined into a larger transfer before bursting over the
-  PCI/AGP bus. This can increase performance of image write operations
-  2.5 times or more. This option creates a /proc/mtrr file which may
-  be used to manipulate your MTRRs. Typically the X server should use
-  this. This should have a reasonably generic interface so that
-  similar control registers on other processors can be easily
-  supported.
+  On Intel P6 family processors (Pentium Pro, Pentium II and later)
+  the Memory Type Range Registers (MTRRs) may be used to control
+  processor access to memory ranges. This is most useful when you have
+  a video (VGA) card on a PCI or AGP bus. Enabling write-combining
+  allows bus write transfers to be combined into a larger transfer
+  before bursting over the PCI/AGP bus. This can increase performance
+  of image write operations 2.5 times or more. This option creates a
+  /proc/mtrr file which may be used to manipulate your
+  MTRRs. Typically the X server should use this. This should have a
+  reasonably generic interface so that similar control registers on
+  other processors can be easily supported.
+
+  The Cyrix 6x86, 6x86MX and M II processors have Address Range
+  Registers (ARRs) which provide a similar functionality to MTRRs. For
+  these, the ARRs are used to emulate the MTRRs.
+
+  The AMD K6-2 (stepping 8 and above) and K6-3 processors have two
+  MTRRs. These are supported.
 
   Saying Y here also fixes a problem with buggy SMP BIOSes which only
   set the MTRRs for the boot CPU and not the secondary CPUs. This can

Documentation/mtrr.txt

@@ -62,6 +62,23 @@ in other words the X server will manipulate /proc/mtrr using the
 ioctl() interface, so users won't have to do anything. If you use a
 commercial X server, lobby your vendor to add support for MTRRs.
 ===============================================================================
+Creating overlapping MTRRs:
+
+%echo "base=0xfb000000 size=0x1000000 type=write-combining" >/proc/mtrr
+%echo "base=0xfb000000 size=0x1000 type=uncachable" >/proc/mtrr
+
+And the results: cat /proc/mtrr
+reg00: base=0x00000000 (   0MB), size=  64MB: write-back, count=1
+reg01: base=0xfb000000 (4016MB), size=  16MB: write-combining, count=1
+reg02: base=0xfb000000 (4016MB), size=   4kB: uncachable, count=1
+
+Some cards (especially Voodoo Graphics boards) need this 4 kB area 
+excluded from the beginning of the region because it is used for
+registers.
+
+NOTE: You can only create type=uncachable region, if the first
+region that you created is type=write-combining.
+===============================================================================
 Removing MTRRs from the shell:
 % echo "disable=2" >! /proc/mtrr
 ===============================================================================

Documentation/networking/ip-sysctl.txt

@@ -211,4 +211,4 @@ kuznet@ms2.inr.ac.ru
 Updated by:
 Andi Kleen
 ak@muc.de
-$Id: ip-sysctl.txt,v 1.8 1999/01/02 16:37:06 davem Exp $
+$Id: ip-sysctl.txt,v 1.9 1999/05/08 02:58:44 davem Exp $

arch/alpha/config.in

@@ -54,12 +54,10 @@ unset CONFIG_PCI CONFIG_ALPHA_EISA
 unset CONFIG_ALPHA_LCA CONFIG_ALPHA_APECS CONFIG_ALPHA_CIA
 unset CONFIG_ALPHA_T2 CONFIG_ALPHA_PYXIS CONFIG_ALPHA_POLARIS
 unset CONFIG_ALPHA_TSUNAMI CONFIG_ALPHA_MCPCIA
-unset CONFIG_ALPHA_NEED_ROUNDING_EMULATION
 
 if [ "$CONFIG_ALPHA_GENERIC" = "y" ]
 then
 	define_bool CONFIG_PCI y
-	define_bool CONFIG_ALPHA_NEED_ROUNDING_EMULATION y
 fi
 if [ "$CONFIG_ALPHA_BOOK1" = "y" ]
 then
@@ -108,7 +106,7 @@ then
 	then
 		define_bool CONFIG_ALPHA_EV5 y
 	else
-	define_bool CONFIG_ALPHA_EV4 y
+		define_bool CONFIG_ALPHA_EV4 y
 	fi
 	define_bool CONFIG_ALPHA_T2 y
 fi
@@ -141,11 +139,6 @@ if [ "$CONFIG_ALPHA_JENSEN" = "y" ]
 then
 	define_bool CONFIG_ALPHA_EV4 y
 fi
-if [ "$CONFIG_ALPHA_EV4" = "y" ]
-then
-	# EV45 and older do not support all rounding modes in hw:
-	define_bool CONFIG_ALPHA_NEED_ROUNDING_EMULATION y
-fi
 
 if [ "$CONFIG_ALPHA_CABRIOLET" = "y" -o "$CONFIG_ALPHA_AVANTI" = "y" \
 	-o "$CONFIG_ALPHA_EB64P" = "y" -o "$CONFIG_ALPHA_JENSEN" = "y" \

arch/alpha/kernel/osf_sys.c

@@ -885,7 +885,21 @@ asmlinkage unsigned long osf_getsysinfo(unsigned long op, void *buffer,
 	case GSI_IEEE_FP_CONTROL:
 		/* Return current software fp control & status bits.  */
 		/* Note that DU doesn't verify available space here.  */
-		w = current->tss.flags & IEEE_SW_MASK;
+
+		/* EV6 implements most of the bits in hardware.  If
+		   UNDZ is not set, UNFD is maintained in software.  */
+		if (implver() == IMPLVER_EV6) {
+			unsigned long fpcr = rdfpcr();
+			w = ieee_fpcr_to_swcr(fpcr);
+			if (!(fpcr & FPCR_UNDZ)) {
+				w &= ~IEEE_TRAP_ENABLE_UNF;
+				w |= current->tss.flags & IEEE_TRAP_ENABLE_UNF;
+			}
+		} else {
+			/* Otherwise we are forced to do everything in sw.  */
+			w = current->tss.flags & IEEE_SW_MASK;
+		}
+
 		if (put_user(w, (unsigned long *) buffer))
 			return -EFAULT;
 		return 0;
@@ -935,7 +949,7 @@ asmlinkage unsigned long osf_setsysinfo(unsigned long op, void *buffer,
 {
 	switch (op) {
 	case SSI_IEEE_FP_CONTROL: {
-		unsigned long swcr, fpcr;
+		unsigned long swcr, fpcr, undz;
 
 		/* 
 		 * Alpha Architecture Handbook 4.7.7.3:
@@ -950,11 +964,12 @@ asmlinkage unsigned long osf_setsysinfo(unsigned long op, void *buffer,
 		current->tss.flags &= ~IEEE_SW_MASK;
 		current->tss.flags |= swcr & IEEE_SW_MASK;
 
-		/* Update the real fpcr.  For exceptions that are disabled in
-		   software but have not been seen, enable the exception in
-		   hardware so that we can update our software status mask.  */
-		fpcr = rdfpcr() & (~FPCR_MASK | FPCR_DYN_MASK);
-		fpcr |= ieee_swcr_to_fpcr(swcr | (~swcr & IEEE_STATUS_MASK)>>16);
+		/* Update the real fpcr.  Keep UNFD off if not UNDZ.  */
+		fpcr = rdfpcr();
+		undz = (fpcr & FPCR_UNDZ);
+		fpcr &= ~(FPCR_MASK | FPCR_DYN_MASK | FPCR_UNDZ);
+		fpcr |= ieee_swcr_to_fpcr(swcr);
+		fpcr &= ~(undz << 1);
 		wrfpcr(fpcr);
 		   
 		return 0;

arch/alpha/kernel/process.c

@@ -237,10 +237,13 @@ void exit_thread(void)
 
 void flush_thread(void)
 {
-	/* Arrange for each exec'ed process to start off with a 
-	   clean slate with respect to the FPU.  */
+	/* Arrange for each exec'ed process to start off with a clean slate
+	   with respect to the FPU.  This is all exceptions disabled.  Note
+           that EV6 defines UNFD valid only with UNDZ, which we don't want
+	   for IEEE conformance -- so that disabled bit remains in software.  */
+
 	current->tss.flags &= ~IEEE_SW_MASK;
-	wrfpcr(FPCR_DYN_NORMAL);
+	wrfpcr(FPCR_DYN_NORMAL | FPCR_INVD | FPCR_DZED | FPCR_OVFD | FPCR_INED);
 }
 
 void release_thread(struct task_struct *dead_task)
@@ -270,8 +273,6 @@ int alpha_vfork(struct switch_stack * swstack)
 			(struct pt_regs *) (swstack+1));
 }
 
-extern void ret_from_sys_call(void);
-extern void ret_from_smpfork(void);
 /*
  * Copy an alpha thread..
  *
@@ -282,9 +283,13 @@ extern void ret_from_smpfork(void);
  * Use the passed "regs" pointer to determine how much space we need
  * for a kernel fork().
  */
+
 int copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
 	struct task_struct * p, struct pt_regs * regs)
 {
+	extern void ret_from_sys_call(void);
+	extern void ret_from_smp_fork(void);
+
 	struct pt_regs * childregs;
 	struct switch_stack * childstack, *stack;
 	unsigned long stack_offset;
@@ -292,18 +297,18 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
 	stack_offset = PAGE_SIZE - sizeof(struct pt_regs);
 	if (!(regs->ps & 8))
 		stack_offset = (PAGE_SIZE-1) & (unsigned long) regs;
-	childregs = (struct pt_regs *) (stack_offset + PAGE_SIZE + (unsigned long)p);
+	childregs = (struct pt_regs *) (stack_offset + PAGE_SIZE + (long)p);
 		
 	*childregs = *regs;
 	childregs->r0 = 0;
 	childregs->r19 = 0;
-	childregs->r20 = 1;	/* OSF/1 has some strange fork() semantics.. */
+	childregs->r20 = 1;	/* OSF/1 has some strange fork() semantics.  */
 	regs->r20 = 0;
 	stack = ((struct switch_stack *) regs) - 1;
 	childstack = ((struct switch_stack *) childregs) - 1;
 	*childstack = *stack;
 #ifdef __SMP__
-	childstack->r26 = (unsigned long) ret_from_smpfork;
+	childstack->r26 = (unsigned long) ret_from_smp_fork;
 #else
 	childstack->r26 = (unsigned long) ret_from_sys_call;
 #endif
@@ -328,10 +333,12 @@ void dump_thread(struct pt_regs * pt, struct user * dump)
 	dump->start_code  = current->mm->start_code;
 	dump->start_data  = current->mm->start_data;
 	dump->start_stack = rdusp() & ~(PAGE_SIZE - 1);
-	dump->u_tsize = (current->mm->end_code - dump->start_code) >> PAGE_SHIFT;
-	dump->u_dsize = (current->mm->brk + (PAGE_SIZE - 1) - dump->start_data) >> PAGE_SHIFT;
-	dump->u_ssize =
-	  (current->mm->start_stack - dump->start_stack + PAGE_SIZE - 1) >> PAGE_SHIFT;
+	dump->u_tsize = ((current->mm->end_code - dump->start_code)
+			 >> PAGE_SHIFT);
+	dump->u_dsize = ((current->mm->brk + PAGE_SIZE-1 - dump->start_data)
+			 >> PAGE_SHIFT);
+	dump->u_ssize = (current->mm->start_stack - dump->start_stack
+			 + PAGE_SIZE-1) >> PAGE_SHIFT;
 
 	/*
 	 * We store the registers in an order/format that is

arch/alpha/kernel/smp.c

@@ -37,7 +37,18 @@
 #define DBGS(args)
 #endif
 
-struct ipi_msg_flush_tb_struct ipi_msg_flush_tb __cacheline_aligned;
+struct ipi_msg_flush_tb_struct {
+	volatile unsigned int flush_tb_mask;
+	union {
+		struct mm_struct *	flush_mm;
+		struct vm_area_struct *	flush_vma;
+	} p;
+	unsigned long flush_addr;
+	unsigned long flush_end;
+};
+
+static struct ipi_msg_flush_tb_struct ipi_msg_flush_tb __cacheline_aligned;
+static spinlock_t flush_tb_lock = SPIN_LOCK_UNLOCKED;
 
 struct cpuinfo_alpha cpu_data[NR_CPUS];
 
@@ -786,7 +797,7 @@ flush_tlb_all(void)
 	unsigned long to_whom = cpu_present_map ^ (1 << smp_processor_id());
 	long timeout = 1000000;
 
-	spin_lock_own(&kernel_flag, "flush_tlb_all");
+	spin_lock(&flush_tb_lock);
 
 	ipi_msg_flush_tb.flush_tb_mask = to_whom;
 	send_ipi_message(to_whom, IPI_TLB_ALL);
@@ -803,6 +814,8 @@ flush_tlb_all(void)
 		       ipi_msg_flush_tb.flush_tb_mask);
 		ipi_msg_flush_tb.flush_tb_mask = 0;
 	}
+
+	spin_unlock(&flush_tb_lock);
 }
 
 void
@@ -811,7 +824,7 @@ flush_tlb_mm(struct mm_struct *mm)
 	unsigned long to_whom = cpu_present_map ^ (1 << smp_processor_id());
 	long timeout = 1000000;
 
-	spin_lock_own(&kernel_flag, "flush_tlb_mm");
+	spin_lock(&flush_tb_lock);
 
 	ipi_msg_flush_tb.flush_tb_mask = to_whom;
 	ipi_msg_flush_tb.p.flush_mm = mm;
@@ -833,6 +846,8 @@ flush_tlb_mm(struct mm_struct *mm)
 		       ipi_msg_flush_tb.flush_tb_mask);
 		ipi_msg_flush_tb.flush_tb_mask = 0;
 	}
+
+	spin_unlock(&flush_tb_lock);
 }
 
 void
@@ -843,7 +858,7 @@ flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
 	struct mm_struct * mm = vma->vm_mm;
 	int timeout = 1000000;
 
-	spin_lock_own(&kernel_flag, "flush_tlb_page");
+	spin_lock(&flush_tb_lock);
 
 	ipi_msg_flush_tb.flush_tb_mask = to_whom;
 	ipi_msg_flush_tb.p.flush_vma = vma;
@@ -866,6 +881,8 @@ flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
 		       ipi_msg_flush_tb.flush_tb_mask);
 		ipi_msg_flush_tb.flush_tb_mask = 0;
 	}
+
+	spin_unlock(&flush_tb_lock);
 }
 
 void

arch/alpha/kernel/traps.c

@@ -125,13 +125,16 @@ do_entArith(unsigned long summary, unsigned long write_mask,
 	    unsigned long a2, unsigned long a3, unsigned long a4,
 	    unsigned long a5, struct pt_regs regs)
 {
-	if ((summary & 1)) {
-		/*
-		 * Software-completion summary bit is set, so try to
-		 * emulate the instruction.
-		 */
-		if (alpha_fp_emul_imprecise(&regs, write_mask)) {
-			return;		/* emulation was successful */
+	if (summary & 1) {
+		/* Software-completion summary bit is set, so try to
+		   emulate the instruction.  */
+		if (implver() == IMPLVER_EV6) {
+			/* Whee!  EV6 has precice exceptions.  */
+			if (alpha_fp_emul(regs.pc - 4))
+				return;
+		} else {
+			if (alpha_fp_emul_imprecise(&regs, write_mask))
+				return;
 		}
 	}
 
@@ -141,7 +144,7 @@ do_entArith(unsigned long summary, unsigned long write_mask,
 		current->comm, regs.pc, summary, write_mask);
 #endif
 	die_if_kernel("Arithmetic fault", &regs, 0, 0);
-	force_sig(SIGFPE, current);
+	send_sig(SIGFPE, current, 1);
 	unlock_kernel();
 }
 
@@ -150,14 +153,17 @@ do_entIF(unsigned long type, unsigned long a1,
 	 unsigned long a2, unsigned long a3, unsigned long a4,
 	 unsigned long a5, struct pt_regs regs)
 {
-	lock_kernel();
 	die_if_kernel("Instruction fault", &regs, type, 0);
 	switch (type) {
 	      case 0: /* breakpoint */
 		if (ptrace_cancel_bpt(current)) {
 			regs.pc -= 4;	/* make pc point to former bpt */
 		}
-		force_sig(SIGTRAP, current);
+		send_sig(SIGTRAP, current, 1);
+		break;
+
+	      case 1: /* bugcheck */
+		send_sig(SIGTRAP, current, 1);
 		break;
 
 	      case 2: /* gentrap */
@@ -171,14 +177,13 @@ do_entIF(unsigned long type, unsigned long a1,
 		switch ((long) regs.r16) {
 		      case GEN_INTOVF: case GEN_INTDIV: case GEN_FLTOVF:
 		      case GEN_FLTDIV: case GEN_FLTUND: case GEN_FLTINV:
-		      case GEN_FLTINE:
-			force_sig(SIGFPE, current);
+		      case GEN_FLTINE: case GEN_ROPRAND:
+			send_sig(SIGFPE, current, 1);
 			break;
 
 		      case GEN_DECOVF:
 		      case GEN_DECDIV:
 		      case GEN_DECINV:
-		      case GEN_ROPRAND:
 		      case GEN_ASSERTERR:
 		      case GEN_NULPTRERR:
 		      case GEN_STKOVF:
@@ -193,42 +198,29 @@ do_entIF(unsigned long type, unsigned long a1,
 		      case GEN_SUBRNG5:
 		      case GEN_SUBRNG6:
 		      case GEN_SUBRNG7:
-			force_sig(SIGILL, current);
+			send_sig(SIGTRAP, current, 1);
 			break;
 		}
 		break;
 
-	      case 1: /* bugcheck */
 	      case 3: /* FEN fault */
-		force_sig(SIGILL, current);
+		send_sig(SIGILL, current, 1);
 		break;
 
 	      case 4: /* opDEC */
-#ifdef CONFIG_ALPHA_NEED_ROUNDING_EMULATION
-		{
-			unsigned int opcode;
-
-			/* get opcode of faulting instruction: */
-			get_user(opcode, (__u32*)(regs.pc - 4));
-			opcode >>= 26;
-			if (opcode == 0x16) {
-				/*
-				 * It's a FLTI instruction, emulate it
-				 * (we don't do no stinkin' VAX fp...)
-				 */
-				if (!alpha_fp_emul(regs.pc - 4))
-					force_sig(SIGFPE, current);
-				break;
-			}
+		if (implver() == IMPLVER_EV4) {
+			/* EV4 does not implement anything except normal
+			   rounding.  Everything else will come here as
+			   an illegal instruction.  Emulate them.  */
+			if (alpha_fp_emul(regs.pc - 4))
+				return;
 		}
-#endif
-		force_sig(SIGILL, current);
+		send_sig(SIGILL, current, 1);
 		break;
 
 	      default:
 		panic("do_entIF: unexpected instruction-fault type");
 	}
-	unlock_kernel();
 }
 
 /* There is an ifdef in the PALcode in MILO that enables a 
@@ -877,14 +869,14 @@ do_entUnaUser(void * va, unsigned long opcode,
 give_sigsegv:
 	regs->pc -= 4;  /* make pc point to faulting insn */
 	lock_kernel();
-	force_sig(SIGSEGV, current);
+	send_sig(SIGSEGV, current, 1);
 	unlock_kernel();
 	return;
 
 give_sigbus:
 	regs->pc -= 4;
 	lock_kernel();
-	force_sig(SIGBUS, current);
+	send_sig(SIGBUS, current, 1);
 	unlock_kernel();
 	return;
 }

arch/alpha/math-emu/fp-emul.c

@@ -13,6 +13,7 @@
 #define OPC_INTL	0x11
 #define OPC_INTS	0x12
 #define OPC_INTM	0x13
+#define OPC_FLTC	0x14
 #define OPC_FLTV	0x15
 #define OPC_FLTI	0x16
 #define OPC_FLTL	0x17
@@ -21,33 +22,37 @@
 
 #define	OPC_JSR		0x1a
 
+#define OP_FUN(OP,FUN)	((OP << 26) | (FUN << 5))
+
 /*
- * "Base" function codes for the FLTI-class instructions.  These
- * instructions all have opcode 0x16.  Note that in most cases these
- * actually correspond to the "chopped" form of the instruction.  Not
- * to worry---we extract the qualifier bits separately and deal with
- * them separately.  Notice that base function code 0x2c is used for
- * both CVTTS and CVTST.  The other bits in the function code are used
- * to distinguish the two.
+ * "Base" function codes for the FLTI-class instructions.
+ * Note that in most cases these actually correspond to the "chopped"
+ * form of the instruction.  Not to worry---we extract the qualifier
+ * bits separately and deal with them separately.  Notice that base
+ * function code 0x2c is used for both CVTTS and CVTST.  The other bits
+ * in the function code are used to distinguish the two.
  */
-#define FLTI_FUNC_ADDS			0x000
-#define FLTI_FUNC_ADDT			0x020
-#define FLTI_FUNC_CMPTEQ		0x025
-#define FLTI_FUNC_CMPTLT		0x026
-#define FLTI_FUNC_CMPTLE		0x027
-#define FLTI_FUNC_CMPTUN		0x024
-#define FLTI_FUNC_CVTTS_or_CVTST	0x02c
-#define FLTI_FUNC_CVTTQ			0x02f
-#define FLTI_FUNC_CVTQS			0x03c
-#define FLTI_FUNC_CVTQT			0x03e
-#define FLTI_FUNC_DIVS			0x003
-#define FLTI_FUNC_DIVT			0x023
-#define FLTI_FUNC_MULS			0x002
-#define FLTI_FUNC_MULT			0x022
-#define FLTI_FUNC_SUBS			0x001
-#define FLTI_FUNC_SUBT			0x021
-
-#define FLTI_FUNC_CVTQL			0x030	/* opcode 0x17 */
+#define FLTI_FUNC_ADDS			OP_FUN(OPC_FLTI, 0x000)
+#define FLTI_FUNC_ADDT			OP_FUN(OPC_FLTI, 0x020)
+#define FLTI_FUNC_CMPTEQ		OP_FUN(OPC_FLTI, 0x025)
+#define FLTI_FUNC_CMPTLT		OP_FUN(OPC_FLTI, 0x026)
+#define FLTI_FUNC_CMPTLE		OP_FUN(OPC_FLTI, 0x027)
+#define FLTI_FUNC_CMPTUN		OP_FUN(OPC_FLTI, 0x024)
+#define FLTI_FUNC_CVTTS_or_CVTST	OP_FUN(OPC_FLTI, 0x02c)
+#define FLTI_FUNC_CVTTQ			OP_FUN(OPC_FLTI, 0x02f)
+#define FLTI_FUNC_CVTQS			OP_FUN(OPC_FLTI, 0x03c)
+#define FLTI_FUNC_CVTQT			OP_FUN(OPC_FLTI, 0x03e)
+#define FLTI_FUNC_DIVS			OP_FUN(OPC_FLTI, 0x003)
+#define FLTI_FUNC_DIVT			OP_FUN(OPC_FLTI, 0x023)
+#define FLTI_FUNC_MULS			OP_FUN(OPC_FLTI, 0x002)
+#define FLTI_FUNC_MULT			OP_FUN(OPC_FLTI, 0x022)
+#define FLTI_FUNC_SUBS			OP_FUN(OPC_FLTI, 0x001)
+#define FLTI_FUNC_SUBT			OP_FUN(OPC_FLTI, 0x021)
+
+#define FLTC_FUNC_SQRTS			OP_FUN(OPC_FLTC, 0x00B)
+#define FLTC_FUNC_SQRTT			OP_FUN(OPC_FLTC, 0x02B)
+
+#define FLTL_FUNC_CVTQL			OP_FUN(OPC_FLTL, 0x030)
 
 #define MISC_TRAPB	0x0000
 #define MISC_EXCB	0x0400
@@ -101,7 +106,7 @@ void cleanup_module(void)
 long
 alpha_fp_emul (unsigned long pc)
 {
-	unsigned long opcode, fa, fb, fc, func, mode;
+	unsigned long op_fun, fa, fb, fc, func, mode;
 	unsigned long fpcw = current->tss.flags;
 	unsigned long va, vb, vc, res, fpcr;
 	__u32 insn;
@@ -110,10 +115,11 @@ alpha_fp_emul (unsigned long pc)
 
 	get_user(insn, (__u32*)pc);
 	fc     = (insn >>  0) &  0x1f;	/* destination register */
-	func   = (insn >>  5) & 0x7ff;
 	fb     = (insn >> 16) &  0x1f;
 	fa     = (insn >> 21) &  0x1f;
-	opcode = insn >> 26;
+	func   = (insn >>  5) & 0x7ff;
+	mode   = (insn >>  5) & 0xc0;
+	op_fun = insn & OP_FUN(0x3f, 0x3f);
 	
 	va = alpha_read_fp_reg(fa);
 	vb = alpha_read_fp_reg(fb);
@@ -123,7 +129,6 @@ alpha_fp_emul (unsigned long pc)
 	 * Try the operation in software.  First, obtain the rounding
 	 * mode...
 	 */
-	mode = func & 0xc0;
 	if (mode == 0xc0) {
 	    /* dynamic---get rounding mode from fpcr: */
 	    mode = ((fpcr & FPCR_DYN_MASK) >> FPCR_DYN_SHIFT) << ROUND_SHIFT;
@@ -135,8 +140,7 @@ alpha_fp_emul (unsigned long pc)
 		something_is_wrong();
 	}
 
-	/* least 6 bits contain operation code: */
-	switch (func & 0x3f) {
+	switch (op_fun) {
 	      case FLTI_FUNC_CMPTEQ:
 		res = ieee_CMPTEQ(va, vb, &vc);
 		break;
@@ -153,7 +157,7 @@ alpha_fp_emul (unsigned long pc)
 		res = ieee_CMPTUN(va, vb, &vc);
 		break;
 
-	      case FLTI_FUNC_CVTQL:
+	      case FLTL_FUNC_CVTQL:
 		/*
 		 * Notice: We can get here only due to an integer
 		 * overflow.  Such overflows are reported as invalid
@@ -222,6 +226,14 @@ alpha_fp_emul (unsigned long pc)
 		res = ieee_CVTTQ(mode, vb, &vc);
 		break;
 
+	      case FLTC_FUNC_SQRTS:
+		res = ieee_SQRTS(mode, vb, &vc);
+		break;
+
+	      case FLTC_FUNC_SQRTT:
+		res = ieee_SQRTT(mode, vb, &vc);
+		break;
+
 	      default:
 		printk("alpha_fp_emul: unexpected function code %#lx at %#lx\n",
 		       func & 0x3f, pc);
@@ -247,7 +259,7 @@ alpha_fp_emul (unsigned long pc)
 
 		/* Update hardware control register */
 		fpcr &= (~FPCR_MASK | FPCR_DYN_MASK);
-		fpcr |= ieee_swcr_to_fpcr(fpcw | (~fpcw&IEEE_STATUS_MASK)>>16);
+		fpcr |= ieee_swcr_to_fpcr(fpcw);
 		wrfpcr(fpcr);
 
 		/* Do we generate a signal?  */
@@ -319,6 +331,7 @@ alpha_fp_emul_imprecise (struct pt_regs *regs, unsigned long write_mask)
 			write_mask &= ~(1UL << rc);
 			break;
 
+		      case OPC_FLTC:
 		      case OPC_FLTV:
 		      case OPC_FLTI:
 		      case OPC_FLTL:
@@ -326,13 +339,11 @@ alpha_fp_emul_imprecise (struct pt_regs *regs, unsigned long write_mask)
 			break;
 		}
 		if (!write_mask) {
-			if ((opcode == OPC_FLTI || opcode == OPC_FLTL)
-			    && alpha_fp_emul(trigger_pc))
-			{
-			    /* re-execute insns in trap-shadow: */
-			    regs->pc = trigger_pc + 4;
-			    MOD_DEC_USE_COUNT;
-			    return 1;
+			if (alpha_fp_emul(trigger_pc)) {
+				/* re-execute insns in trap-shadow: */
+				regs->pc = trigger_pc + 4;
+				MOD_DEC_USE_COUNT;
+				return 1;
 			}
 			break;
 		}

arch/alpha/math-emu/ieee-math.c

@@ -22,6 +22,7 @@
  * functions are used on exceptional numbers only (well, assuming you
  * don't turn on the "trap on inexact"...).
  */
+#include <linux/sched.h>
 #include "ieee-math.h"
 
 #define STICKY_S	0x20000000	/* both in longword 0 of fraction */
@@ -1340,3 +1341,41 @@ ieee_DIVT (int f, unsigned long a, unsigned long b, unsigned long *c)
 	op_c.e -= 9;		/* remove excess exp from original shift */
 	return round_t_ieee(f, &op_c, c);
 }
+
+/*
+ * Sqrt a = b, where a and b are ieee s-floating numbers.  "f"
+ * contains the rounding mode etc.
+ */
+unsigned long
+ieee_SQRTS (int f, unsigned long a, unsigned long *b)
+{
+	fpclass_t a_type;
+	EXTENDED op_a, op_b;
+
+	*b = IEEE_QNaN;
+	a_type = extend_ieee(a, &op_a, SINGLE);
+	if (op_a.s == 0) {
+		/* FIXME -- handle positive denormals.  */
+		send_sig(SIGFPE, current, 1);
+	}
+	return FPCR_INV;
+}
+
+/*
+ * Sqrt a = b, where a and b are ieee t-floating numbers.  "f"
+ * contains the rounding mode etc.
+ */
+unsigned long
+ieee_SQRTT (int f, unsigned long a, unsigned long *b)
+{
+	fpclass_t a_type;
+	EXTENDED op_a, op_b;
+
+	*b = IEEE_QNaN;
+	a_type = extend_ieee(a, &op_a, DOUBLE);
+	if (op_a.s == 0) {
+		/* FIXME -- handle positive denormals.  */
+		send_sig(SIGFPE, current, 1);
+	}
+	return FPCR_INV;
+}

arch/alpha/math-emu/ieee-math.h

@@ -48,5 +48,7 @@ extern unsigned long ieee_DIVS (int rm, unsigned long a, unsigned long b,
 				unsigned long *c);
 extern unsigned long ieee_DIVT (int rm, unsigned long a, unsigned long b,
 				unsigned long *c);
+extern unsigned long ieee_SQRTS (int rm, unsigned long a, unsigned long *b);
+extern unsigned long ieee_SQRTT (int rm, unsigned long a, unsigned long *b);
 
 #endif /* __ieee_math_h__ */

arch/i386/kernel/i386_ksyms.c

@@ -92,7 +92,7 @@ EXPORT_SYMBOL(__global_cli);
 EXPORT_SYMBOL(__global_sti);
 EXPORT_SYMBOL(__global_save_flags);
 EXPORT_SYMBOL(__global_restore_flags);
-EXPORT_SYMBOL(mtrr_hook);
+EXPORT_SYMBOL(smp_call_function);
 #endif
 
 #ifdef CONFIG_MCA

arch/i386/kernel/irq.c

@@ -322,7 +322,7 @@ BUILD_16_IRQS(0xc) BUILD_16_IRQS(0xd)
 BUILD_SMP_INTERRUPT(reschedule_interrupt)
 BUILD_SMP_INTERRUPT(invalidate_interrupt)
 BUILD_SMP_INTERRUPT(stop_cpu_interrupt)
-BUILD_SMP_INTERRUPT(mtrr_interrupt)
+BUILD_SMP_INTERRUPT(call_function_interrupt)
 BUILD_SMP_INTERRUPT(spurious_interrupt)
 
 /*
@@ -1094,8 +1094,8 @@ __initfunc(void init_IRQ(void))
 	/* self generated IPI for local APIC timer */
 	set_intr_gate(LOCAL_TIMER_VECTOR, apic_timer_interrupt);
 
-	/* IPI for MTRR control */
-	set_intr_gate(MTRR_CHANGE_VECTOR, mtrr_interrupt);
+	/* IPI for generic function call */
+	set_intr_gate(CALL_FUNCTION_VECTOR, call_function_interrupt);
 
 	/* IPI vector for APIC spurious interrupts */
 	set_intr_gate(SPURIOUS_APIC_VECTOR, spurious_interrupt);

arch/i386/kernel/irq.h

@@ -65,7 +65,7 @@ typedef struct {
 #define INVALIDATE_TLB_VECTOR	0x31
 #define STOP_CPU_VECTOR		0x40
 #define LOCAL_TIMER_VECTOR	0x41
-#define MTRR_CHANGE_VECTOR	0x50
+#define CALL_FUNCTION_VECTOR	0x50
 
 /*
  * First APIC vector available to drivers: (vectors 0x51-0xfe)
@@ -99,7 +99,6 @@ extern void disable_8259A_irq(unsigned int irq);
 extern int i8259A_irq_pending(unsigned int irq);
 extern void ack_APIC_irq(void);
 extern void FASTCALL(send_IPI_self(int vector));
-extern void smp_send_mtrr(void);
 extern void init_VISWS_APIC_irqs(void);
 extern void setup_IO_APIC(void);
 extern int IO_APIC_get_PCI_irq_vector(int bus, int slot, int fn);

arch/i386/kernel/setup.c

@@ -5,6 +5,10 @@
  *
  *  Enhanced CPU type detection by Mike Jagdis, Patrick St. Jean
  *  and Martin Mares, November 1997.
+ *
+ *  Force Cyrix 6x86(MX) and M II processors to report MTRR capability
+ *  and fix against Cyrix "coma bug" by
+ *      Zoltan Boszormenyi <zboszor@mol.hu> February 1999.
  */
 
 /*
@@ -395,6 +399,14 @@ __initfunc(static int get_model_name(struct cpuinfo_x86 *c))
 	cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]);
 	cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]);
 	c->x86_model_id[48] = 0;
+	/*  Set MTRR capability flag if appropriate  */
+	if(boot_cpu_data.x86 !=5)
+		return 1;
+	if((boot_cpu_data.x86_model == 9) ||
+	   ((boot_cpu_data.x86_model == 8) && 
+	    (boot_cpu_data.x86_mask >= 8)))
+		c->x86_capability |= X86_FEATURE_MTRR;
+
 	return 1;
 }
 
@@ -574,6 +586,10 @@ __initfunc(static void cyrix_model(struct cpuinfo_x86 *c))
 			(c->x86_model)++;
 		} else             /* 686 */
 			p = Cx86_cb+1;
+		/* Emulate MTRRs using Cyrix's ARRs. */
+		c->x86_capability |= X86_FEATURE_MTRR;
+		/* 6x86's contain this bug */
+		c->coma_bug = 1;
 		break;
 
 	case 4: /* MediaGX/GXm */
@@ -598,11 +614,14 @@ __initfunc(static void cyrix_model(struct cpuinfo_x86 *c))
 
         case 5: /* 6x86MX/M II */
 		if (dir1 > 7) dir0_msn++;  /* M II */
+		else c->coma_bug = 1;      /* 6x86MX, it has the bug. */
 		tmp = (!(dir0_lsn & 7) || dir0_lsn & 1) ? 2 : 0;
 		Cx86_cb[tmp] = cyrix_model_mult2[dir0_lsn & 7];
 		p = Cx86_cb+tmp;
         	if (((dir1 & 0x0f) > 4) || ((dir1 & 0xf0) == 0x20))
 			(c->x86_model)++;
+		/* Emulate MTRRs using Cyrix's ARRs. */
+		c->x86_capability |= X86_FEATURE_MTRR;
 		break;
 
 	case 0xf:  /* Cyrix 486 without DEVID registers */
@@ -856,7 +875,7 @@ int get_cpuinfo(char * buffer)
 	int sep_bug;
 	static char *x86_cap_flags[] = {
 	        "fpu", "vme", "de", "pse", "tsc", "msr", "6", "mce",
-	        "cx8", "9", "10", "sep", "12", "pge", "14", "cmov",
+	        "cx8", "9", "10", "sep", "mtrr", "pge", "14", "cmov",
 	        "16", "17", "psn", "19", "20", "21", "22", "mmx",
 	        "24", "kni", "26", "27", "28", "29", "30", "31"
 	};
@@ -904,7 +923,6 @@ int get_cpuinfo(char * buffer)
 		} else if (c->x86_vendor == X86_VENDOR_INTEL) {
 			x86_cap_flags[6] = "pae";
 			x86_cap_flags[9] = "apic";
-			x86_cap_flags[12] = "mtrr";
 			x86_cap_flags[14] = "mca";
 			x86_cap_flags[16] = "pat";
 			x86_cap_flags[17] = "pse36";
@@ -923,6 +941,7 @@ int get_cpuinfo(char * buffer)
 			        "hlt_bug\t\t: %s\n"
 			        "sep_bug\t\t: %s\n"
 			        "f00f_bug\t: %s\n"
+			        "coma_bug\t: %s\n"
 			        "fpu\t\t: %s\n"
 			        "fpu_exception\t: %s\n"
 			        "cpuid level\t: %d\n"
@@ -932,6 +951,7 @@ int get_cpuinfo(char * buffer)
 			     c->hlt_works_ok ? "no" : "yes",
 			     sep_bug ? "yes" : "no",
 			     c->f00f_bug ? "yes" : "no",
+			     c->coma_bug ? "yes" : "no",
 			     c->hard_math ? "yes" : "no",
 			     (c->hard_math && ignore_irq13) ? "yes" : "no",
 			     c->cpuid_level,

arch/i386/kernel/smp.c

@@ -44,6 +44,8 @@
 
 #include "irq.h"
 
+#define JIFFIE_TIMEOUT 100
+
 extern void update_one_process( struct task_struct *p,
 				unsigned long ticks, unsigned long user,
 				unsigned long system, int cpu);
@@ -1651,15 +1653,84 @@ void smp_send_stop(void)
 	send_IPI_allbutself(STOP_CPU_VECTOR);
 }
 
+/* Structure and data for smp_call_function(). This is designed to minimise
+ * static memory requirements. It also looks cleaner.
+ */
+struct smp_call_function_struct {
+	void (*func) (void *info);
+	void *info;
+	atomic_t unstarted_count;
+	atomic_t unfinished_count;
+	int wait;
+};
+static volatile struct smp_call_function_struct *smp_call_function_data = NULL;
+
 /*
- * this function sends an 'reload MTRR state' IPI to all other CPUs
- * in the system. it goes straight through, completion processing
- * is done on the mttr.c level.
+ * this function sends a 'generic call function' IPI to all other CPUs
+ * in the system.
  */
 
-void smp_send_mtrr(void)
+int smp_call_function (void (*func) (void *info), void *info, int retry,
+		       int wait)
+/*  [SUMMARY] Run a function on all other CPUs.
+    <func> The function to run. This must be fast and non-blocking.
+    <info> An arbitrary pointer to pass to the function.
+    <retry> If true, keep retrying until ready.
+    <wait> If true, wait until function has completed on other CPUs.
+    [RETURNS] 0 on success, else a negative status code. Does not return until
+    remote CPUs are nearly ready to execute <<func>> or are or have executed.
+*/
 {
-	send_IPI_allbutself(MTRR_CHANGE_VECTOR);
+	unsigned long timeout;
+	struct smp_call_function_struct data;
+	static spinlock_t lock = SPIN_LOCK_UNLOCKED;
+
+	if (retry) {
+		while (1) {
+			if (smp_call_function_data) {
+				schedule ();  /*  Give a mate a go  */
+				continue;
+			}
+			spin_lock (&lock);
+			if (smp_call_function_data) {
+				spin_unlock (&lock);  /*  Bad luck  */
+				continue;
+			}
+			/*  Mine, all mine!  */
+			break;
+		}
+	}
+	else {
+		if (smp_call_function_data) return -EBUSY;
+		spin_lock (&lock);
+		if (smp_call_function_data) {
+			spin_unlock (&lock);
+			return -EBUSY;
+		}
+	}
+	smp_call_function_data = &data;
+	spin_unlock (&lock);
+	data.func = func;
+	data.info = info;
+	atomic_set (&data.unstarted_count, smp_num_cpus - 1);
+	data.wait = wait;
+	if (wait) atomic_set (&data.unfinished_count, smp_num_cpus - 1);
+	/*  Send a message to all other CPUs and wait for them to respond  */
+	send_IPI_allbutself (CALL_FUNCTION_VECTOR);
+	/*  Wait for response  */
+	timeout = jiffies + JIFFIE_TIMEOUT;
+	while ( (atomic_read (&data.unstarted_count) > 0) &&
+		time_before (jiffies, timeout) )
+		barrier ();
+	if (atomic_read (&data.unstarted_count) > 0) {
+		smp_call_function_data = NULL;
+		return -ETIMEDOUT;
+	}
+	if (wait)
+		while (atomic_read (&data.unfinished_count) > 0)
+			barrier ();
+	smp_call_function_data = NULL;
+	return 0;
 }
 
 /*
@@ -1798,12 +1869,19 @@ asmlinkage void smp_stop_cpu_interrupt(void)
 	stop_this_cpu();
 }
 
-void (*mtrr_hook) (void) = NULL;
-
-asmlinkage void smp_mtrr_interrupt(void)
+asmlinkage void smp_call_function_interrupt(void)
 {
-	ack_APIC_irq();
-	if (mtrr_hook) (*mtrr_hook)();
+	void (*func) (void *info) = smp_call_function_data->func;
+	void *info = smp_call_function_data->info;
+	int wait = smp_call_function_data->wait;
+
+	ack_APIC_irq ();
+	/*  Notify initiating CPU that I've grabbed the data and am about to
+	    execute the function  */
+	atomic_dec (&smp_call_function_data->unstarted_count);
+	/*  At this point the structure may be out of scope unless wait==1  */
+	(*func) (info);
+	if (wait) atomic_dec (&smp_call_function_data->unfinished_count);
 }
 
 /*

drivers/Makefile

@@ -47,7 +47,11 @@ endif
 ifeq ($(CONFIG_USB),y)
 SUB_DIRS += usb
 MOD_SUB_DIRS += usb
-endif
+else
+  ifeq ($(CONFIG_USB),m)
+  MOD_SUB_DIRS += usb
+  endif
+endif 
 
 # If CONFIG_SCSI is set, the core of SCSI support will be added to the kernel,
 # but some of the low-level things may also be modules.

drivers/char/lp.c

@@ -202,9 +202,7 @@ struct lp_struct lp_table[LP_NO] =
 /* Test if the printer is not acking the strobe */
 #define	LP_NO_ACKING(status)	((status) & LP_PACK)
 /* Test if the printer has error conditions */
-#define LP_NO_ERROR(status)					\
-	 (((status) & (LP_POUTPA|LP_PSELECD|LP_PERRORP)) ==	\
-	 (LP_PSELECD|LP_PERRORP))
+#define LP_NO_ERROR(status)	((status) & LP_PERRORP)
 
 #undef LP_DEBUG
 #undef LP_READ_DEBUG
@@ -424,7 +422,10 @@ static int lp_check_status(int minor)
 {
 	unsigned int last = lp_table[minor].last_error;
 	unsigned char status = r_str(minor);
-	if ((status & LP_POUTPA)) {
+	if (status & LP_PERRORP)
+		/* No error. */
+		last = 0;
+	else if ((status & LP_POUTPA)) {
 		if (last != LP_POUTPA) {
 			last = LP_POUTPA;
 			printk(KERN_INFO "lp%d out of paper\n", minor);
@@ -434,13 +435,12 @@ static int lp_check_status(int minor)
 			last = LP_PSELECD;
 			printk(KERN_INFO "lp%d off-line\n", minor);
 		}
-	} else if (!(status & LP_PERRORP)) {
+	} else {
 		if (last != LP_PERRORP) {
 			last = LP_PERRORP;
-			printk(KERN_INFO "lp%d on fire!\n", minor);
+			printk(KERN_INFO "lp%d on fire\n", minor);
 		}
 	}
-	else last = 0;
 
 	lp_table[minor].last_error = last;
 

drivers/char/mem.c

@@ -57,7 +57,10 @@ int uhci_init(void);
 #ifdef CONFIG_USB_OHCI
 int ohci_init(void);
 #endif
-
+#ifdef CONFIG_USB_OHCI_HCD
+int ohci_hcd_init(void);
+#endif
+     
 static ssize_t do_write_mem(struct file * file, void *p, unsigned long realp,
 			    const char * buf, size_t count, loff_t *ppos)
 {
@@ -612,6 +615,9 @@ __initfunc(int chr_dev_init(void))
 #ifdef CONFIG_USB_OHCI
 	ohci_init();
 #endif
+#ifdef CONFIG_USB_OHCI_HCD
+        ohci_hcd_init(); 
+#endif
 #endif
 #if defined (CONFIG_FB)
 	fbmem_init();

drivers/char/planb.c

@@ -29,7 +29,6 @@
 
 /* $Id: planb.c,v 1.18 1999/05/02 17:36:34 mlan Exp $ */
 
-#include <linux/config.h>
 #include <linux/version.h>
 #include <linux/init.h>
 #include <linux/errno.h>

drivers/misc/parport_ieee1284.c

@@ -48,25 +48,22 @@ int parport_wait_peripheral(struct parport *port, unsigned char mask,
 int parport_ieee1284_nibble_mode_ok(struct parport *port, unsigned char mode) 
 {
 	/* make sure it's a valid state, set nStrobe & nAutoFeed high */
-	parport_write_control(port, (parport_read_control(port) \
-		& ~1 ) & ~2);
+	parport_frob_control (port, (1|2), 0);
 	udelay(1);
 	parport_write_data(port, mode);
 	udelay(400);
 	/* nSelectIn high, nAutoFd low */
-	parport_write_control(port, (parport_read_control(port) & ~8) | 2);
+	parport_frob_control(port, (2|8), 2);
 	if (parport_wait_peripheral(port, 0x78, 0x38)) {
-		parport_write_control(port, 
-				      (parport_read_control(port) & ~2) | 8);
+		parport_frob_control(port, (2|8), 8);
 		return 0; 
 	}
 	/* nStrobe low */
-	parport_write_control(port, parport_read_control(port) | 1);
+	parport_frob_control (port, 1, 1);
 	udelay(1);				     /* Strobe wait */
 	/* nStrobe high, nAutoFeed low, last step before transferring 
 	 *  reverse data */
-	parport_write_control(port, (parport_read_control(port) \
-		& ~1) & ~2);
+	parport_frob_control (port, (1|2), 0);
 	udelay(1);
 	/* Data available? */
 	parport_wait_peripheral (port, PARPORT_STATUS_ACK, PARPORT_STATUS_ACK);

drivers/misc/parport_pc.c

@@ -53,6 +53,8 @@
    than PARPORT_MAX (in <linux/parport.h>).  */
 #define PARPORT_PC_MAX_PORTS  8
 
+static int user_specified = 0;
+
 static void parport_pc_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 {
 	parport_generic_irq(irq, (struct parport *) dev_id, regs);
@@ -103,19 +105,24 @@ unsigned char parport_pc_read_data(struct parport *p)
 
 void parport_pc_write_control(struct parport *p, unsigned char d)
 {
+	struct parport_pc_private *priv = p->private_data;
+	priv->ctr = d;/* update soft copy */
 	outb(d, p->base+CONTROL);
 }
 
 unsigned char parport_pc_read_control(struct parport *p)
 {
-	return inb(p->base+CONTROL);
+	struct parport_pc_private *priv = p->private_data;
+	return priv->ctr;
 }
 
 unsigned char parport_pc_frob_control(struct parport *p, unsigned char mask,  unsigned char val)
 {
-	unsigned char old = inb(p->base+CONTROL);
-	outb(((old & ~mask) ^ val), p->base+CONTROL);
-	return old;
+	struct parport_pc_private *priv = p->private_data;
+	unsigned char ctr = priv->ctr;
+	ctr = (ctr & ~mask) ^ val;
+	outb (ctr, p->base+CONTROL);
+	return priv->ctr = ctr; /* update soft copy */
 }
 
 void parport_pc_write_status(struct parport *p, unsigned char d)
@@ -345,6 +352,8 @@ int parport_pc_epp_clear_timeout(struct parport *pb)
  */
 static int parport_SPP_supported(struct parport *pb)
 {
+	unsigned char r, w;
+
 	/*
 	 * first clear an eventually pending EPP timeout 
 	 * I (sailer@ife.ee.ethz.ch) have an SMSC chipset
@@ -354,14 +363,54 @@ static int parport_SPP_supported(struct parport *pb)
 	parport_pc_epp_clear_timeout(pb);
 
 	/* Do a simple read-write test to make sure the port exists. */
-	parport_pc_write_control(pb, 0xc);
-	parport_pc_write_data(pb, 0xaa);
-	if (parport_pc_read_data(pb) != 0xaa) return 0;
-	
-	parport_pc_write_data(pb, 0x55);
-	if (parport_pc_read_data(pb) != 0x55) return 0;
+	w = 0xc;
+	parport_pc_write_control(pb, w);
+
+	/* Can we read from the control register?  Some ports don't
+	 * allow reads, so read_control just returns a software
+	 * copy. Some ports _do_ allow reads, so bypass the software
+	 * copy here.  In addition, some bits aren't writable. */
+	r = inb (pb->base+CONTROL);
+	if ((r & 0x3f) == w) {
+		w = 0xe;
+		parport_pc_write_control (pb, w);
+		r = inb (pb->base+CONTROL);
+		parport_pc_write_control (pb, 0xc);
+		if ((r & 0x3f) == w)
+			return PARPORT_MODE_PCSPP;
+	}
 
-	return PARPORT_MODE_PCSPP;
+	if (user_specified)
+		/* That didn't work, but the user thinks there's a
+		 * port here. */
+		printk (KERN_DEBUG "0x%lx: CTR: wrote 0x%02x, read 0x%02x\n",
+			pb->base, w, r);
+
+	/* Try the data register.  The data lines aren't tri-stated at
+	 * this stage, so we expect back what we wrote. */
+	w = 0xaa;
+	parport_pc_write_data (pb, w);
+	r = parport_pc_read_data (pb);
+	if (r == w) {
+		w = 0x55;
+		parport_pc_write_data (pb, w);
+		r = parport_pc_read_data (pb);
+		if (r == w)
+			return PARPORT_MODE_PCSPP;
+	}
+
+	if (user_specified)
+		/* Didn't work with 0xaa, but the user is convinced
+		 * this is the place. */
+		printk (KERN_DEBUG "0x%lx: DATA: wrote 0x%02x, read 0x%02x\n",
+			pb->base, w, r);
+
+	/* It's possible that we can't read the control register or
+	   the data register.  In that case just believe the user. */
+	if (user_specified)
+		return PARPORT_MODE_PCSPP;
+
+	return 0;
 }
 
 /* Check for ECP
@@ -712,6 +761,15 @@ static int probe_one_port(unsigned long int base, int irq, int dma)
 	if (check_region(base, 3)) return 0;
 	if (!(p = parport_register_port(base, irq, dma, &parport_pc_ops)))
 		return 0;
+	p->private_data = kmalloc (sizeof (struct parport_pc_private),
+				   GFP_KERNEL);
+	if (!p->private_data) {
+		/* Not enough memory. */
+		printk (KERN_DEBUG "parport (0x%lx): no memory!\n", base);
+		parport_unregister_port (p);
+		return 0;
+	}
+	((struct parport_pc_private *) (p->private_data))->ctr = 0xc;
 	if (p->base != 0x3bc) {
 		if (!check_region(base+0x400,3)) {
 			p->modes |= parport_ECR_present(p);	
@@ -725,6 +783,7 @@ static int probe_one_port(unsigned long int base, int irq, int dma)
 	}
 	if (!parport_SPP_supported(p)) {
 		/* No port. */
+		kfree (p->private_data);
 		parport_unregister_port (p);
 		return 0;
 	}
@@ -787,6 +846,7 @@ int parport_pc_init(int *io, int *irq, int *dma)
 	int count = 0, i = 0;
 	if (io && *io) {
 		/* Only probe the ports we were given. */
+		user_specified = 1;
 		do {
 			count += probe_one_port(*(io++), *(irq++), *(dma++));
 		} while (*io && (++i < PARPORT_PC_MAX_PORTS));
@@ -829,6 +889,7 @@ void cleanup_module(void)
 			if (!(p->flags & PARPORT_FLAG_COMA)) 
 				parport_quiesce(p);
 			parport_proc_unregister(p);
+			kfree (p->private_data);
 			parport_unregister_port(p);
 		}
 		p = tmp;

drivers/net/ethertap.c

@@ -98,6 +98,7 @@ __initfunc(int ethertap_probe(struct device *dev))
 
 	ether_setup(dev);
 
+	dev->hard_header_len = 16;
 	dev->tx_queue_len = 0;
 	dev->flags|=IFF_NOARP;
 	tap_map[dev->base_addr]=dev;

drivers/usb/Config.in

@@ -16,6 +16,10 @@ if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
   if [ ! "$CONFIG_USB" = "n" ]; then
     bool 'UHCI (intel PIIX4 and others) support?' CONFIG_USB_UHCI
     bool 'OHCI (compaq and some others) support?' CONFIG_USB_OHCI
+    bool 'OHCI-HCD (other OHCI opt. Virt. Root Hub) support?' CONFIG_USB_OHCI_HCD
+    if [ "$CONFIG_USB_OHCI_HCD" = "y" ]; then
+       bool 'OHCI-HCD Virtual Root Hub' CONFIG_USB_OHCI_VROOTHUB
+    fi
 
     bool 'USB mouse support' CONFIG_USB_MOUSE
     bool 'USB keyboard support' CONFIG_USB_KBD

drivers/usb/Makefile

@@ -59,7 +59,17 @@ ifeq ($(CONFIG_USB_OHCI),y)
   endif
 endif
 
-
+ifeq ($(CONFIG_USB_OHCI_HCD),y)
+  ifeq ($(CONFIG_USB), y)
+    L_OBJS += ohci-hcd.o ohci-root-hub.o
+  else
+    ifeq ($(CONFIG_USB),m)
+      USBO_OBJS += ohci-hcd.o ohci-root-hub.o
+      M_OBJS += usb-ohci-hcd.o
+      MIX_OBJS += $(USBX_OBJS)
+    endif
+  endif
+endif
 include $(TOPDIR)/Rules.make
 
 keymap.o: keymap.c
@@ -73,3 +83,6 @@ usb-uhci.o: uhci.o uhci-debug.o $(USBX_OBJS)
 usb-ohci.o: ohci.o ohci-debug.o $(USBX_OBJS)
 	$(LD) $(LD_RFLAG) -r -o $@ ohci.o ohci-debug.o $(USBX_OBJS)
 
+usb-ohci-hcd.o: ohci-hcd.o ohci-root-hub.o $(USBX_OBJS)
+	$(LD) $(LD_RFLAG) -r -o $@ ohci-hcd.o ohci-root-hub.o $(USBX_OBJS)
+       

drivers/usb/README.ohci_hcd

+
+The OHCI HCD layer is a simple but nearly complete implementation of what the
+USB people would call a HCD  for the OHCI. 
+ (ISO comming soon, Bulk disabled, INT u. CTRL transfers enabled)
+It is based on Linus Torvalds UHCI code and Gregory Smith OHCI fragments (0.03 source tree).
+The layer (functions) on top of it, is for interfacing to the alternate-usb device-drivers. 
+
+- Roman Weissgaerber <weissg@vienna.at>
+
+
+ * v2.1 1999/05/09 ep_addr correction, code cleanup
+ * v0.2.0 1999/05/04 
+ * everything has been moved into 2 files (ohci-hcd.c, ohci-hub-root.c and headers)
+ * virtual root hub is now an option, 
+ * memory allocation based on kmalloc and kfree now, simple Bus error handling, 
+ * INT and CTRL transfers enabled, Bulk included but disabled, ISO needs completion
+ * 
+ * from Linus Torvalds (uhci.c): APM (not tested); hub, usb_device, bus and related stuff
+ * from Greg Smith (ohci.c): better reset ohci-controller handling, hub
+ * 
+ * v0.1.0 1999/04/27 initial release
+ 
+to remove the module try:
+killall root-hub
+:
+rmmod usb-ohci-hcd
+
+Features:
+- virtual root hub, all basic hub descriptors and commands (state: complete) 
+  this is an option now (v0.2.0)
+  #define  CONFIG_USB_OHCI_VROOTHUB includes the virtual hub code, (VROOTHUB)
+  default is without. 
+  (at the moment: the Virtual Root Hub option is not recommended)
+  
+  files: ohci-root-hub.c, ohci-root-hub.h 
+ 
+
+- Endpoint Descriptor (ED) handling more static approach 
+ (EDs should be allocated in parallel to the SET CONFIGURATION command and they live
+ as long as the function (device) is alive or another configuration is choosen.
+ In the HCD layer the EDs has to be allocated manually either by calling a subroutine
+ or by sending a USB root hub vendor specific command to the virtual root hub.
+ At the alternate linux usb stack EDs will be added (allocated) at their first use.
+ 
+ files: ohci-hcd.c ohci-hcd.h
+ routines:   (do not use for drivers, use the top layer alternate usb commands instead)
+ 
+ int usb_ohci_add_ep(struct ohci * ohci, unsigned int ep_addr1, 
+            int interval, int load, f_handler handler, int ep_size, int speed)
+       adds an endpoint, (if the endpoint already exists some parameters will be updated)
+       
+ int usb_ohci_rm_ep(struct  usb_ohci_ed *ed, struct ohci * ohci) 
+       removes an endpoint and all pending TDs of that EP
+       
+  usb_ohci_rm_function( struct ohci * ohci, union ep_addr_ ep_addr)
+       removes all Endpoints of a function (device)
+
+- Transfer Descriptors (TD): handling and allocation of TDs is transparent to the upper layers
+  The HCD takes care of TDs and EDs memory allocation whereas the upper layers (UBSD ...) has
+  to take care of buffer allocation.
+  files: ohci-hcd.c ohci-hcd.h 
+
+  There is one basic command for all types of bus transfers (INT, BULK, ISO, CTRL):
+  
+  int ohci_trans_req(struct ohci * ohci, int ep_addr, int ctrl_len, void  *ctrl, void * data, int data_len, __OHCI_BAG lw0, __OHCI_BAG lw1)
+  
+  CTRL: ctrl, ctrl_len ... cmd buffer 
+        data, data_len ... data buffer (in or out)
+  INT, BULK:  ctrl = NULL, ctrl_len=0,
+  		data, data_len ... data buffer (in or out)
+  ISO: tbd
+
+  There is no buffer reinsertion done by the internal HCD function. 
+  (The interface layer does this for a INT-pipe on request.)
+  If you want a transfer then you have to 
+  provide buffers by sending ohci_trans_req requests. As they are queued as TDs on an ED
+  you can send as many as you like. They should come back by the callback f_handler in
+  the same order (for each endpoint, not globally) If an error occurs all
+  queued transfers of an endpoint will return unsent. They will be marked with an error status.
+  
+  e.g double-buffering for int transfers:
+
+   	ohci_trans_req(ohci, ep_addr, 0, NULL, data0, data0_len, 0,0)
+  	ohci_trans_req(ohci, ep_addr, 0, NULL, data1, data1_len, 0,0)
+  	
+  and when a data0 packet returns by the callback f_handler requeue it:
+  	ohci_trans_req(ohci, ep_addr, 0, NULL, data0, data0_len, 0,0)
+  and when a data1 packet returns by the callback f_handler requeue it:
+  	ohci_trans_req(ohci, ep_addr, 0, NULL, data1, data1_len, 0,0)
+  	
+  lw0, lw1 are private fields for upper layers for ids or fine grained handlers.
+  The alternate usb uses them for dev_id and usb_device_irq handler.
+
+
+- Done list handling: returns the requests (callback f_handler in ED) and does 
+  some error handling, root-hub request dequeuing
+  (files: ohci-done-list.c in ohci-hcd.c now(v0.2.0))
+
+ep_addr union or int  is for addressing devices&endpoints: 
+__u8 ep_addr.bep.ep ... bit 3..0  endpoint address
+						bit 4     0
+						bit 6,5  type: eg. 10 CTRL, 11 BULK, 01 INT, 00 ISO
+						bit 7	direction 1 IN, 0 OUT
+
+__u8 ep_addr.bep.fa ... bit 6..0  function address
+						bit 7	  0
+
+(__u8 ep_addr.bep.hc ... host controller nr) not used
+(__u8 ep_addr.bep.host ... host nr) not used
+
+
+  

drivers/usb/ohci-root-hub.h

+/*
+ * HCD (OHCI) Virtual Root Hub Protocol for USB.
+ *
+ * (C) Copyright 1999 Roman Weissgaerber (weissg@vienna.at)
+ *
+ * The Root Hub is build into the HC (UHCI or OHCI) hardware. 
+ * This piece of code lets it look like it resides on the bus 
+ * like the other hubs.
+ * (for anyone who wants to do a control operation on the root hub)
+ *  
+ * v1.0 1999/04/27
+ * ohci-root-hub.h
+ *  
+ */
+ 
+/* destination of request */
+#define RH_INTERFACE               0x01
+#define RH_ENDPOINT                0x02
+#define RH_OTHER                   0x03
+
+#define RH_CLASS                   0x20
+#define RH_VENDOR                  0x40
+
+/* Requests: bRequest << 8 | bmRequestType */
+#define RH_GET_STATUS           0x0080
+#define RH_CLEAR_FEATURE        0x0100
+#define RH_SET_FEATURE          0x0300
+#define RH_SET_ADDRESS			0x0500
+#define RH_GET_DESCRIPTOR		0x0680
+#define RH_SET_DESCRIPTOR       0x0700
+#define RH_GET_CONFIGURATION	0x0880
+#define RH_SET_CONFIGURATION	0x0900
+#define RH_GET_STATE            0x0280
+#define RH_GET_INTERFACE        0x0A80
+#define RH_SET_INTERFACE        0x0B00
+#define RH_SYNC_FRAME           0x0C80
+/* Our Vendor Specific Request */
+#define RH_SET_EP               0x2000
+
+
+/* Hub port features */
+#define RH_PORT_CONNECTION         0x00
+#define RH_PORT_ENABLE             0x01
+#define RH_PORT_SUSPEND            0x02
+#define RH_PORT_OVER_CURRENT       0x03
+#define RH_PORT_RESET              0x04
+#define RH_PORT_POWER              0x08
+#define RH_PORT_LOW_SPEED          0x09
+#define RH_C_PORT_CONNECTION       0x10
+#define RH_C_PORT_ENABLE           0x11
+#define RH_C_PORT_SUSPEND          0x12
+#define RH_C_PORT_OVER_CURRENT     0x13
+#define RH_C_PORT_RESET            0x14  
+
+/* Hub features */
+#define RH_C_HUB_LOCAL_POWER       0x00
+#define RH_C_HUB_OVER_CURRENT      0x01
+
+#define RH_DEVICE_REMOTE_WAKEUP    0x00
+#define RH_ENDPOINT_STALL          0x01
+
+/* Our Vendor Specific feature */
+#define RH_REMOVE_EP               0x00
+
+
+#define RH_ACK                     0x01
+#define RH_REQ_ERR                 -1
+#define RH_NACK                    0x00
+ 
+#define min(a,b) (((a)<(b))?(a):(b))  
+ 

drivers/usb/usb.h

@@ -9,7 +9,7 @@
 static __inline__ void wait_ms(unsigned int ms)
 {
         current->state = TASK_UNINTERRUPTIBLE;
-        schedule_timeout(1 + ms / 10);
+        schedule_timeout(1 + ms * HZ / 1000);
 }
 
 

drivers/video/vesafb.c

@@ -635,10 +635,8 @@ __initfunc(void vesafb_init(void))
 		video_cmap_len = 256;
 	}
 	request_region(0x3c0, 32, "vga+");
-#ifdef CONFIG_MTRR
 	if (mtrr)
 		mtrr_add((unsigned long)video_base, video_size, MTRR_TYPE_WRCOMB, 1);
-#endif
 	
 	strcpy(fb_info.modename, "VESA VGA");
 	fb_info.changevar = NULL;