# This is a BitKeeper generated patch for the following project:
# Project Name: Linux kernel tree
# This patch format is intended for GNU patch command version 2.5 or higher.
# This patch includes the following deltas:
#	           ChangeSet	1.1484+1.1350.5.6 -> 1.1485 
#	arch/ppc64/kernel/signal.c	1.28.1.1 -> 1.30   
#	include/linux/init.h	1.26.1.2 -> 1.29   
#	include/asm-sparc/unistd.h	1.20.1.7 -> 1.27   
#	include/linux/sched.h	1.151.1.24 -> 1.164  
#	include/asm-sparc64/unistd.h	1.19.1.7 -> 1.26   
#	include/linux/serial.h	1.8.1.2 -> 1.11   
#	drivers/serial/serial_core.c	1.72.1.2 -> 1.74   
#	drivers/acpi/pci_root.c	1.13.1.4 -> 1.18   
#	           mm/swap.c	1.52.1.2 -> 1.56   
#	include/linux/pci_ids.h	1.103.1.23 -> 1.111  
#	         mm/memory.c	1.123.1.18 -> 1.136  
#	kernel/posix-timers.c	1.19.1.4 -> 1.23   
#	include/linux/sysctl.h	1.47.1.6 -> 1.53   
#	   drivers/net/tg3.c	1.72.1.40 -> 1.80   
#	            Makefile	1.410.1.28 -> 1.425  
#	     kernel/module.c	1.86.1.9 -> 1.95   
#	net/ipv4/tcp_input.c	1.39.1.8 -> 1.45   
#	      kernel/sched.c	1.193.1.31 -> 1.206  
#	      kernel/timer.c	1.59.1.14 -> 1.71   
#	arch/ppc64/kernel/signal32.c	1.40.1.1 -> 1.43   
#	drivers/video/radeonfb.c	1.26.1.5 -> 1.30   
#
diff -Nru a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c
--- a/drivers/serial/serial_core.c	Wed Nov 26 00:39:21 2003
+++ b/drivers/serial/serial_core.c	Wed Nov 26 00:39:21 2003
@@ -1862,6 +1862,9 @@
 	if (flow == 'r')
 		termios.c_cflag |= CRTSCTS;
 
+	if (!port->ops)
+		return 0;
+
 	port->ops->set_termios(port, &termios, NULL);
 	co->cflag = termios.c_cflag;
 
diff -Nru a/include/linux/sysctl.h b/include/linux/sysctl.h
--- a/include/linux/sysctl.h	Wed Nov 26 00:39:21 2003
+++ b/include/linux/sysctl.h	Wed Nov 26 00:39:21 2003
@@ -127,6 +127,7 @@
 	KERN_PANIC_ON_OOPS=57,  /* int: whether we will panic on an oops */
 	KERN_HPPA_PWRSW=58,	/* int: hppa soft-power enable */
 	KERN_HPPA_UNALIGNED=59,	/* int: hppa unaligned-trap enable */
+	KERN_CACHEDECAYTICKS=60,/* ulong: value for cache_decay_ticks (EXPERIMENTAL!) */
 };
 
 
diff -Nru a/mm/memory.c b/mm/memory.c
--- a/mm/memory.c	Wed Nov 26 00:39:21 2003
+++ b/mm/memory.c	Wed Nov 26 00:39:21 2003
@@ -121,8 +121,10 @@
 	}
 	pmd = pmd_offset(dir, 0);
 	pgd_clear(dir);
-	for (j = 0; j < PTRS_PER_PMD ; j++)
+	for (j = 0; j < PTRS_PER_PMD ; j++) {
+		prefetchw(pmd + j + PREFETCH_STRIDE/sizeof(*pmd));
 		free_one_pmd(tlb, pmd+j);
+	}
 	pmd_free_tlb(tlb, pmd);
 }