Merge tiger.hpl.hp.com:/data1/bk/vanilla/linux-2.5

into tiger.hpl.hp.com:/data1/bk/lia64/to-linus-2.5

arch/ia64/Kconfig

@@ -149,20 +149,6 @@ config IA64_L1_CACHE_SHIFT
 	default "6" if ITANIUM
 
 # align cache-sensitive data to 64 bytes
-config MCKINLEY_ASTEP_SPECIFIC
-	bool "McKinley A-step specific code"
-	depends on MCKINLEY
-	help
-	  Select this option to build a kernel for an IA-64 McKinley prototype
-	  system with any A-stepping CPU.
-
-config MCKINLEY_A0_SPECIFIC
-	bool "McKinley A0/A1-step specific code"
-	depends on MCKINLEY_ASTEP_SPECIFIC
-	help
-	  Select this option to build a kernel for an IA-64 McKinley prototype
-	  system with an A0 or A1 stepping CPU.
-
 config NUMA
 	bool "NUMA support"
 	depends on !IA64_HP_SIM

arch/ia64/configs/sn2_defconfig

@@ -14,18 +14,22 @@ CONFIG_STANDALONE=y
 #
 CONFIG_SWAP=y
 CONFIG_SYSVIPC=y
+CONFIG_POSIX_MQUEUE=y
 # CONFIG_BSD_PROCESS_ACCT is not set
 CONFIG_SYSCTL=y
+# CONFIG_AUDIT is not set
 CONFIG_LOG_BUF_SHIFT=20
 CONFIG_HOTPLUG=y
 # CONFIG_IKCONFIG is not set
 # CONFIG_EMBEDDED is not set
 CONFIG_KALLSYMS=y
+CONFIG_KALLSYMS_ALL=y
 CONFIG_FUTEX=y
 CONFIG_EPOLL=y
 CONFIG_IOSCHED_NOOP=y
 CONFIG_IOSCHED_AS=y
 CONFIG_IOSCHED_DEADLINE=y
+CONFIG_IOSCHED_CFQ=y
 # CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
 
 #
@@ -60,7 +64,6 @@ CONFIG_MCKINLEY=y
 CONFIG_IA64_PAGE_SIZE_16KB=y
 # CONFIG_IA64_PAGE_SIZE_64KB is not set
 CONFIG_IA64_L1_CACHE_SHIFT=7
-# CONFIG_MCKINLEY_ASTEP_SPECIFIC is not set
 CONFIG_NUMA=y
 CONFIG_VIRTUAL_MEM_MAP=y
 CONFIG_DISCONTIGMEM=y
@@ -70,12 +73,17 @@ CONFIG_IA64_SGI_SN_SIM=y
 CONFIG_FORCE_MAX_ZONEORDER=18
 CONFIG_SMP=y
 CONFIG_NR_CPUS=512
+# CONFIG_HOTPLUG_CPU is not set
 # CONFIG_PREEMPT is not set
 CONFIG_HAVE_DEC_LOCK=y
 CONFIG_IA32_SUPPORT=y
 CONFIG_COMPAT=y
 CONFIG_PERFMON=y
 CONFIG_IA64_PALINFO=y
+
+#
+# Firmware Drivers
+#
 CONFIG_EFI_VARS=y
 CONFIG_BINFMT_ELF=y
 # CONFIG_BINFMT_MISC is not set
@@ -105,6 +113,7 @@ CONFIG_ACPI_SYSTEM=y
 #
 CONFIG_PCI=y
 CONFIG_PCI_DOMAINS=y
+# CONFIG_PCI_USE_VECTOR is not set
 CONFIG_PCI_LEGACY_PROC=y
 CONFIG_PCI_NAMES=y
 
@@ -174,7 +183,6 @@ CONFIG_BLK_DEV_IDE=y
 #
 CONFIG_BLK_DEV_IDEDISK=y
 # CONFIG_IDEDISK_MULTI_MODE is not set
-# CONFIG_IDEDISK_STROKE is not set
 CONFIG_BLK_DEV_IDECD=m
 CONFIG_BLK_DEV_IDETAPE=m
 CONFIG_BLK_DEV_IDEFLOPPY=y
@@ -218,6 +226,7 @@ CONFIG_BLK_DEV_SGIIOC4=y
 # CONFIG_BLK_DEV_SLC90E66 is not set
 # CONFIG_BLK_DEV_TRM290 is not set
 # CONFIG_BLK_DEV_VIA82CXXX is not set
+# CONFIG_IDE_ARM is not set
 CONFIG_BLK_DEV_IDEDMA=y
 # CONFIG_IDEDMA_IVB is not set
 CONFIG_IDEDMA_AUTO=y
@@ -243,7 +252,6 @@ CONFIG_CHR_DEV_SG=m
 # Some SCSI devices (e.g. CD jukebox) support multiple LUNs
 #
 # CONFIG_SCSI_MULTI_LUN is not set
-CONFIG_SCSI_REPORT_LUNS=y
 CONFIG_SCSI_CONSTANTS=y
 # CONFIG_SCSI_LOGGING is not set
 
@@ -281,7 +289,9 @@ CONFIG_SCSI_SATA=y
 CONFIG_SCSI_SATA_SVW=m
 CONFIG_SCSI_ATA_PIIX=m
 CONFIG_SCSI_SATA_PROMISE=m
+# CONFIG_SCSI_SATA_SX4 is not set
 # CONFIG_SCSI_SATA_SIL is not set
+# CONFIG_SCSI_SATA_SIS is not set
 CONFIG_SCSI_SATA_VIA=m
 CONFIG_SCSI_SATA_VITESSE=y
 # CONFIG_SCSI_BUSLOGIC is not set
@@ -298,6 +308,7 @@ CONFIG_SCSI_SYM53C8XX_DMA_ADDRESSING_MODE=1
 CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS=16
 CONFIG_SCSI_SYM53C8XX_MAX_TAGS=64
 # CONFIG_SCSI_SYM53C8XX_IOMAPPED is not set
+# CONFIG_SCSI_IPR is not set
 # CONFIG_SCSI_QLOGIC_ISP is not set
 # CONFIG_SCSI_QLOGIC_FC is not set
 CONFIG_SCSI_QLOGIC_1280=y
@@ -343,6 +354,7 @@ CONFIG_FUSION_CTL=m
 #
 # I2O device support
 #
+# CONFIG_I2O is not set
 
 #
 # Networking support
@@ -389,8 +401,6 @@ CONFIG_INET6_AH=m
 CONFIG_INET6_ESP=m
 CONFIG_INET6_IPCOMP=m
 CONFIG_IPV6_TUNNEL=m
-# CONFIG_DECNET is not set
-CONFIG_BRIDGE=m
 CONFIG_NETFILTER=y
 # CONFIG_NETFILTER_DEBUG is not set
 CONFIG_BRIDGE_NETFILTER=y
@@ -452,6 +462,7 @@ CONFIG_IP_NF_ARPFILTER=m
 CONFIG_IP_NF_ARP_MANGLE=m
 # CONFIG_IP_NF_COMPAT_IPCHAINS is not set
 # CONFIG_IP_NF_COMPAT_IPFWADM is not set
+# CONFIG_IP_NF_RAW is not set
 
 #
 # IPv6: Netfilter Configuration
@@ -471,7 +482,9 @@ CONFIG_XFRM_USER=m
 #
 # CONFIG_IP_SCTP is not set
 # CONFIG_ATM is not set
+CONFIG_BRIDGE=m
 CONFIG_VLAN_8021Q=m
+# CONFIG_DECNET is not set
 # CONFIG_LLC2 is not set
 # CONFIG_IPX is not set
 # CONFIG_ATALK is not set
@@ -516,18 +529,25 @@ CONFIG_NET_CLS_POLICE=y
 # Network testing
 #
 # CONFIG_NET_PKTGEN is not set
+CONFIG_NETPOLL=y
+# CONFIG_NETPOLL_RX is not set
+# CONFIG_NETPOLL_TRAP is not set
+CONFIG_NET_POLL_CONTROLLER=y
+# CONFIG_HAMRADIO is not set
+# CONFIG_IRDA is not set
+# CONFIG_BT is not set
 CONFIG_NETDEVICES=y
-
-#
-# ARCnet devices
-#
-# CONFIG_ARCNET is not set
 CONFIG_DUMMY=m
 CONFIG_BONDING=m
 CONFIG_EQUALIZER=m
 CONFIG_TUN=m
 # CONFIG_ETHERTAP is not set
 
+#
+# ARCnet devices
+#
+# CONFIG_ARCNET is not set
+
 #
 # Ethernet (10 or 100Mbit)
 #
@@ -582,7 +602,6 @@ CONFIG_NS83820=m
 CONFIG_HAMACHI=m
 CONFIG_YELLOWFIN=m
 CONFIG_R8169=m
-CONFIG_SIS190=m
 CONFIG_SK98LIN=m
 CONFIG_TIGON3=y
 
@@ -591,6 +610,22 @@ CONFIG_TIGON3=y
 #
 CONFIG_IXGB=m
 # CONFIG_IXGB_NAPI is not set
+# CONFIG_S2IO is not set
+
+#
+# Token Ring devices
+#
+# CONFIG_TR is not set
+
+#
+# Wireless LAN (non-hamradio)
+#
+# CONFIG_NET_RADIO is not set
+
+#
+# Wan interfaces
+#
+# CONFIG_WAN is not set
 # CONFIG_FDDI is not set
 # CONFIG_HIPPI is not set
 CONFIG_PPP=m
@@ -602,44 +637,10 @@ CONFIG_PPP_DEFLATE=m
 # CONFIG_PPP_BSDCOMP is not set
 # CONFIG_PPPOE is not set
 # CONFIG_SLIP is not set
-
-#
-# Wireless LAN (non-hamradio)
-#
-# CONFIG_NET_RADIO is not set
-
-#
-# Token Ring devices
-#
-# CONFIG_TR is not set
 CONFIG_NET_FC=y
 # CONFIG_SHAPER is not set
 CONFIG_NETCONSOLE=y
 
-#
-# Wan interfaces
-#
-# CONFIG_WAN is not set
-
-#
-# Amateur Radio support
-#
-# CONFIG_HAMRADIO is not set
-
-#
-# IrDA (infrared) support
-#
-# CONFIG_IRDA is not set
-
-#
-# Bluetooth support
-#
-# CONFIG_BT is not set
-CONFIG_NETPOLL=y
-# CONFIG_NETPOLL_RX is not set
-# CONFIG_NETPOLL_TRAP is not set
-CONFIG_NET_POLL_CONTROLLER=y
-
 #
 # ISDN subsystem
 #
@@ -703,6 +704,7 @@ CONFIG_VT_CONSOLE=y
 CONFIG_HW_CONSOLE=y
 CONFIG_SERIAL_NONSTANDARD=y
 # CONFIG_ROCKETPORT is not set
+# CONFIG_CYCLADES is not set
 # CONFIG_SYNCLINK is not set
 # CONFIG_SYNCLINKMP is not set
 # CONFIG_N_HDLC is not set
@@ -713,18 +715,11 @@ CONFIG_SGI_L1_SERIAL_CONSOLE=y
 #
 # Serial drivers
 #
-CONFIG_SERIAL_8250=y
-CONFIG_SERIAL_8250_CONSOLE=y
-CONFIG_SERIAL_8250_HCDP=y
-CONFIG_SERIAL_8250_ACPI=y
-CONFIG_SERIAL_8250_NR_UARTS=4
-# CONFIG_SERIAL_8250_EXTENDED is not set
+# CONFIG_SERIAL_8250 is not set
 
 #
 # Non-8250 serial port support
 #
-CONFIG_SERIAL_CORE=y
-CONFIG_SERIAL_CORE_CONSOLE=y
 CONFIG_UNIX98_PTYS=y
 CONFIG_LEGACY_PTYS=y
 CONFIG_LEGACY_PTY_COUNT=256
@@ -740,7 +735,6 @@ CONFIG_LEGACY_PTY_COUNT=256
 #
 # CONFIG_WATCHDOG is not set
 # CONFIG_HW_RANDOM is not set
-# CONFIG_GEN_RTC is not set
 CONFIG_EFI_RTC=y
 # CONFIG_DTLK is not set
 # CONFIG_R3964 is not set
@@ -852,6 +846,7 @@ CONFIG_VFAT_FS=y
 #
 CONFIG_PROC_FS=y
 CONFIG_PROC_KCORE=y
+CONFIG_SYSFS=y
 # CONFIG_DEVFS_FS is not set
 # CONFIG_DEVPTS_FS_XATTR is not set
 CONFIG_TMPFS=y
@@ -897,7 +892,6 @@ CONFIG_SMB_FS=m
 # CONFIG_CIFS is not set
 # CONFIG_NCP_FS is not set
 # CONFIG_CODA_FS is not set
-# CONFIG_INTERMEZZO_FS is not set
 # CONFIG_AFS_FS is not set
 
 #
@@ -968,6 +962,7 @@ CONFIG_NLS_DEFAULT="iso8859-1"
 # Library routines
 #
 CONFIG_CRC32=y
+# CONFIG_LIBCRC32C is not set
 CONFIG_ZLIB_INFLATE=m
 CONFIG_ZLIB_DEFLATE=m
 
@@ -1019,4 +1014,5 @@ CONFIG_CRYPTO_DES=m
 # CONFIG_CRYPTO_ARC4 is not set
 CONFIG_CRYPTO_DEFLATE=m
 # CONFIG_CRYPTO_MICHAEL_MIC is not set
+# CONFIG_CRYPTO_CRC32C is not set
 # CONFIG_CRYPTO_TEST is not set

arch/ia64/defconfig

@@ -26,6 +26,7 @@ CONFIG_IKCONFIG=y
 CONFIG_IKCONFIG_PROC=y
 # CONFIG_EMBEDDED is not set
 CONFIG_KALLSYMS=y
+# CONFIG_KALLSYMS_ALL is not set
 CONFIG_FUTEX=y
 CONFIG_EPOLL=y
 CONFIG_IOSCHED_NOOP=y
@@ -66,7 +67,6 @@ CONFIG_MCKINLEY=y
 CONFIG_IA64_PAGE_SIZE_16KB=y
 # CONFIG_IA64_PAGE_SIZE_64KB is not set
 CONFIG_IA64_L1_CACHE_SHIFT=7
-# CONFIG_MCKINLEY_ASTEP_SPECIFIC is not set
 # CONFIG_NUMA is not set
 CONFIG_VIRTUAL_MEM_MAP=y
 # CONFIG_IA64_CYCLONE is not set
@@ -74,6 +74,7 @@ CONFIG_IOSAPIC=y
 CONFIG_FORCE_MAX_ZONEORDER=18
 CONFIG_SMP=y
 CONFIG_NR_CPUS=16
+# CONFIG_HOTPLUG_CPU is not set
 # CONFIG_PREEMPT is not set
 CONFIG_HAVE_DEC_LOCK=y
 CONFIG_IA32_SUPPORT=y
@@ -178,7 +179,6 @@ CONFIG_BLK_DEV_IDE=y
 #
 CONFIG_BLK_DEV_IDEDISK=y
 CONFIG_IDEDISK_MULTI_MODE=y
-# CONFIG_IDEDISK_STROKE is not set
 CONFIG_BLK_DEV_IDECD=y
 # CONFIG_BLK_DEV_IDETAPE is not set
 CONFIG_BLK_DEV_IDEFLOPPY=m
@@ -220,6 +220,7 @@ CONFIG_BLK_DEV_SIIMAGE=y
 # CONFIG_BLK_DEV_SLC90E66 is not set
 # CONFIG_BLK_DEV_TRM290 is not set
 # CONFIG_BLK_DEV_VIA82CXXX is not set
+# CONFIG_IDE_ARM is not set
 CONFIG_BLK_DEV_IDEDMA=y
 # CONFIG_IDEDMA_IVB is not set
 CONFIG_IDEDMA_AUTO=y
@@ -245,7 +246,6 @@ CONFIG_CHR_DEV_SG=y
 # Some SCSI devices (e.g. CD jukebox) support multiple LUNs
 #
 CONFIG_SCSI_MULTI_LUN=y
-CONFIG_SCSI_REPORT_LUNS=y
 CONFIG_SCSI_CONSTANTS=y
 CONFIG_SCSI_LOGGING=y
 
@@ -282,6 +282,7 @@ CONFIG_SCSI_SYM53C8XX_DMA_ADDRESSING_MODE=1
 CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS=16
 CONFIG_SCSI_SYM53C8XX_MAX_TAGS=64
 # CONFIG_SCSI_SYM53C8XX_IOMAPPED is not set
+# CONFIG_SCSI_IPR is not set
 # CONFIG_SCSI_PCI2000 is not set
 # CONFIG_SCSI_PCI2220I is not set
 # CONFIG_SCSI_QLOGIC_ISP is not set
@@ -328,6 +329,7 @@ CONFIG_FUSION_MAX_SGE=40
 #
 # I2O device support
 #
+# CONFIG_I2O is not set
 
 #
 # Networking support
@@ -573,7 +575,12 @@ CONFIG_LEGACY_PTY_COUNT=256
 #
 # IPMI
 #
-# CONFIG_IPMI_HANDLER is not set
+CONFIG_IPMI_HANDLER=m
+CONFIG_IPMI_PANIC_EVENT=y
+CONFIG_IPMI_PANIC_STRING=y
+CONFIG_IPMI_DEVICE_INTERFACE=m
+CONFIG_IPMI_SI=m
+CONFIG_IPMI_WATCHDOG=m
 
 #
 # Watchdog Cards
@@ -651,6 +658,7 @@ CONFIG_I2C_ALGOBIT=y
 # CONFIG_SENSORS_LM83 is not set
 # CONFIG_SENSORS_LM85 is not set
 # CONFIG_SENSORS_LM90 is not set
+# CONFIG_SENSORS_MAX1619 is not set
 # CONFIG_SENSORS_VIA686A is not set
 # CONFIG_SENSORS_W83781D is not set
 # CONFIG_SENSORS_W83L785TS is not set
@@ -662,6 +670,7 @@ CONFIG_I2C_ALGOBIT=y
 # CONFIG_SENSORS_EEPROM is not set
 # CONFIG_SENSORS_PCF8574 is not set
 # CONFIG_SENSORS_PCF8591 is not set
+# CONFIG_SENSORS_RTC8564 is not set
 # CONFIG_I2C_DEBUG_CORE is not set
 # CONFIG_I2C_DEBUG_ALGO is not set
 # CONFIG_I2C_DEBUG_BUS is not set
@@ -688,6 +697,7 @@ CONFIG_FB=y
 # CONFIG_FB_CIRRUS is not set
 # CONFIG_FB_PM2 is not set
 # CONFIG_FB_CYBER2000 is not set
+# CONFIG_FB_ASILIANT is not set
 # CONFIG_FB_IMSTT is not set
 CONFIG_FB_RIVA=m
 # CONFIG_FB_MATROX is not set
@@ -852,6 +862,7 @@ CONFIG_USB_HIDDEV=y
 # CONFIG_USB_KBTAB is not set
 # CONFIG_USB_POWERMATE is not set
 # CONFIG_USB_MTOUCH is not set
+# CONFIG_USB_EGALAX is not set
 # CONFIG_USB_XPAD is not set
 # CONFIG_USB_ATI_REMOTE is not set
 
@@ -901,6 +912,7 @@ CONFIG_USB_HIDDEV=y
 # CONFIG_USB_LCD is not set
 # CONFIG_USB_LED is not set
 # CONFIG_USB_CYTHERM is not set
+# CONFIG_USB_PHIDGETSERVO is not set
 # CONFIG_USB_TEST is not set
 
 #
@@ -998,7 +1010,6 @@ CONFIG_RPCSEC_GSS_KRB5=y
 # CONFIG_CIFS is not set
 # CONFIG_NCP_FS is not set
 # CONFIG_CODA_FS is not set
-# CONFIG_INTERMEZZO_FS is not set
 # CONFIG_AFS_FS is not set
 
 #
@@ -1083,7 +1094,7 @@ CONFIG_IA64_GRANULE_16MB=y
 # CONFIG_IA64_GRANULE_64MB is not set
 CONFIG_DEBUG_KERNEL=y
 CONFIG_IA64_PRINT_HAZARDS=y
-CONFIG_DISABLE_VHPT=y
+# CONFIG_DISABLE_VHPT is not set
 CONFIG_MAGIC_SYSRQ=y
 # CONFIG_IA64_EARLY_PRINTK_VGA is not set
 # CONFIG_DEBUG_SLAB is not set

arch/ia64/ia32/binfmt_elf32.c

@@ -197,6 +197,10 @@ ia32_setup_arg_pages (struct linux_binprm *bprm, int executable_stack)
 	}
 	up_write(&current->mm->mmap_sem);
 
+	/* Can't do it in ia64_elf32_init(). Needs to be done before calls to
+	   elf32_map() */
+	current->thread.ppl = ia32_init_pp_list();
+
 	return 0;
 }
 

arch/ia64/ia32/ia32_entry.S

@@ -371,7 +371,7 @@ ia32_syscall_table:
 	data8 sys_sched_get_priority_min	 /* 160 */
 	data8 sys32_sched_rr_get_interval
 	data8 compat_sys_nanosleep
-	data8 sys_mremap
+	data8 sys32_mremap
 	data8 sys_setresuid	/* 16-bit version */
 	data8 sys32_getresuid16	/* 16-bit version */	  /* 165 */
 	data8 sys_ni_syscall	/* vm86 */

arch/ia64/ia32/ia32_support.c

@@ -218,6 +218,18 @@ ia32_init (void)
 	ia32_exec_domain.signal_map = default_exec_domain.signal_map;
 	ia32_exec_domain.signal_invmap = default_exec_domain.signal_invmap;
 	register_exec_domain(&ia32_exec_domain);
+
+#if PAGE_SHIFT > IA32_PAGE_SHIFT
+	{
+		extern kmem_cache_t *partial_page_cachep;
+
+		partial_page_cachep = kmem_cache_create("partial_page_cache",
+							sizeof(struct partial_page), 0, 0,
+							NULL, NULL);
+		if (!partial_page_cachep)
+			panic("Cannot create partial page SLAB cache");
+	}
+#endif
 	return 0;
 }
 

arch/ia64/ia32/ia32priv.h

-#ifndef _ASM_IA64_IA32_H
-#define _ASM_IA64_IA32_H
+#ifndef _ASM_IA64_IA32_PRIV_H
+#define _ASM_IA64_IA32_PRIV_H
 
 #include <linux/config.h>
 
@@ -9,6 +9,7 @@
 
 #include <linux/binfmts.h>
 #include <linux/compat.h>
+#include <linux/rbtree.h>
 
 #include <asm/processor.h>
 
@@ -16,12 +17,39 @@
  * 32 bit structures for IA32 support.
  */
 
-#define IA32_PAGE_SHIFT		12	/* 4KB pages */
 #define IA32_PAGE_SIZE		(1UL << IA32_PAGE_SHIFT)
 #define IA32_PAGE_MASK		(~(IA32_PAGE_SIZE - 1))
 #define IA32_PAGE_ALIGN(addr)	(((addr) + IA32_PAGE_SIZE - 1) & IA32_PAGE_MASK)
 #define IA32_CLOCKS_PER_SEC	100	/* Cast in stone for IA32 Linux */
 
+/*
+ * partially mapped pages provide precise accounting of which 4k sub pages
+ * are mapped and which ones are not, thereby improving IA-32 compatibility.
+ */
+struct partial_page {
+	struct partial_page	*next; /* linked list, sorted by address */
+	struct rb_node		pp_rb;
+	/* 64K is the largest "normal" page supported by ia64 ABI. So 4K*32
+	 * should suffice.*/
+	unsigned int		bitmap;
+	unsigned int		base;
+};
+
+struct partial_page_list {
+	struct partial_page	*pp_head; /* list head, points to the lowest
+					   * addressed partial page */
+	struct rb_root		ppl_rb;
+	struct partial_page	*pp_hint; /* pp_hint->next is the last
+					   * accessed partial page */
+	atomic_t		pp_count; /* reference count */
+};
+
+#if PAGE_SHIFT > IA32_PAGE_SHIFT
+struct partial_page_list* ia32_init_pp_list (void);
+#else
+# define ia32_init_pp_list()	0
+#endif
+
 /* sigcontext.h */
 /*
  * As documented in the iBCS2 standard..
@@ -528,4 +556,4 @@ extern int save_ia32_fpxstate (struct task_struct *tsk, struct ia32_user_fxsr_st
 
 #endif /* !CONFIG_IA32_SUPPORT */
 
-#endif /* _ASM_IA64_IA32_H */
+#endif /* _ASM_IA64_IA32_PRIV_H */

arch/ia64/ia32/sys_ia32.c

@@ -8,6 +8,7 @@
  * Copyright (C) 1997		David S. Miller (davem@caip.rutgers.edu)
  * Copyright (C) 2000-2003 Hewlett-Packard Co
  *	David Mosberger-Tang <davidm@hpl.hp.com>
+ * Copyright (C) 2004		Gordon Jin <gordon.jin@intel.com>
  *
  * These routines maintain argument size conversion between 32bit and 64bit
  * environment.
@@ -48,6 +49,7 @@
 #include <linux/ipc.h>
 #include <linux/compat.h>
 #include <linux/vfs.h>
+#include <linux/mman.h>
 
 #include <asm/intrinsics.h>
 #include <asm/semaphore.h>
@@ -250,6 +252,376 @@ mmap_subpage (struct file *file, unsigned long start, unsigned long end, int pro
 	return ret;
 }
 
+/* SLAB cache for partial_page structures */
+kmem_cache_t *partial_page_cachep;
+
+/*
+ * init partial_page_list.
+ * return 0 means kmalloc fail.
+ */
+struct partial_page_list*
+ia32_init_pp_list(void)
+{
+	struct partial_page_list *p;
+
+	if ((p = kmalloc(sizeof(*p), GFP_KERNEL)) == NULL)
+		return p;
+	p->pp_head = 0;
+	p->ppl_rb = RB_ROOT;
+	p->pp_hint = 0;
+	atomic_set(&p->pp_count, 1);
+	return p;
+}
+
+/*
+ * Search for the partial page with @start in partial page list @ppl.
+ * If finds the partial page, return the found partial page.
+ * Else, return 0 and provide @pprev, @rb_link, @rb_parent to
+ * be used by later ia32_insert_pp().
+ */
+static struct partial_page *
+ia32_find_pp(struct partial_page_list *ppl, unsigned int start,
+	struct partial_page **pprev, struct rb_node ***rb_link,
+	struct rb_node **rb_parent)
+{
+	struct partial_page *pp;
+	struct rb_node **__rb_link, *__rb_parent, *rb_prev;
+
+	pp = ppl->pp_hint;
+	if (pp && pp->base == start)
+		return pp;
+
+	__rb_link = &ppl->ppl_rb.rb_node;
+	rb_prev = __rb_parent = NULL;
+
+	while (*__rb_link) {
+		__rb_parent = *__rb_link;
+		pp = rb_entry(__rb_parent, struct partial_page, pp_rb);
+
+		if (pp->base == start) {
+			ppl->pp_hint = pp;
+			return pp;
+		} else if (pp->base < start) {
+			rb_prev = __rb_parent;
+			__rb_link = &__rb_parent->rb_right;
+		} else {
+			__rb_link = &__rb_parent->rb_left;
+		}
+	}
+
+	*rb_link = __rb_link;
+	*rb_parent = __rb_parent;
+	*pprev = NULL;
+	if (rb_prev)
+		*pprev = rb_entry(rb_prev, struct partial_page, pp_rb);
+	return NULL;
+}
+
+/*
+ * insert @pp into @ppl.
+ */
+static void
+ia32_insert_pp(struct partial_page_list *ppl, struct partial_page *pp,
+	 struct partial_page *prev, struct rb_node **rb_link,
+	struct rb_node *rb_parent)
+{
+	/* link list */
+	if (prev) {
+		pp->next = prev->next;
+		prev->next = pp;
+	} else {
+		ppl->pp_head = pp;
+		if (rb_parent)
+			pp->next = rb_entry(rb_parent,
+				struct partial_page, pp_rb);
+		else
+			pp->next = NULL;
+	}
+
+	/* link rb */
+	rb_link_node(&pp->pp_rb, rb_parent, rb_link);
+	rb_insert_color(&pp->pp_rb, &ppl->ppl_rb);
+
+	ppl->pp_hint = pp;
+}
+
+/*
+ * delete @pp from partial page list @ppl.
+ */
+static void
+ia32_delete_pp(struct partial_page_list *ppl, struct partial_page *pp,
+	struct partial_page *prev)
+{
+	if (prev) {
+		prev->next = pp->next;
+		if (ppl->pp_hint == pp)
+			ppl->pp_hint = prev;
+	} else {
+		ppl->pp_head = pp->next;
+		if (ppl->pp_hint == pp)
+			ppl->pp_hint = pp->next;
+	}
+	rb_erase(&pp->pp_rb, &ppl->ppl_rb);
+	kmem_cache_free(partial_page_cachep, pp);
+}
+
+static struct partial_page *
+pp_prev(struct partial_page *pp)
+{
+	struct rb_node *prev = rb_prev(&pp->pp_rb);
+	if (prev)
+		return rb_entry(prev, struct partial_page, pp_rb);
+	else
+		return NULL;
+}
+
+/*
+ * Set the range between @start and @end in bitmap.
+ * @start and @end should be IA32 page aligned and in the same IA64 page.
+ */
+static int
+__ia32_set_pp(unsigned int start, unsigned int end)
+{
+	struct partial_page *pp, *prev;
+	struct rb_node ** rb_link, *rb_parent;
+	unsigned int pstart, start_bit, end_bit, i;
+
+	pstart = PAGE_START(start);
+	start_bit = (start % PAGE_SIZE) / IA32_PAGE_SIZE;
+	end_bit = (end % PAGE_SIZE) / IA32_PAGE_SIZE;
+	if (end_bit == 0)
+		end_bit = PAGE_SIZE / IA32_PAGE_SIZE;
+	pp = ia32_find_pp(current->thread.ppl, pstart, &prev,
+					&rb_link, &rb_parent);
+	if (pp) {
+		for (i = start_bit; i < end_bit; i++)
+			set_bit(i, &pp->bitmap);
+		/*
+		 * Check: if this partial page has been set to a full page,
+		 * then delete it.
+		 */
+		if (find_first_zero_bit(&pp->bitmap, sizeof(pp->bitmap)*8) >=
+				PAGE_SIZE/IA32_PAGE_SIZE) {
+			ia32_delete_pp(current->thread.ppl, pp, pp_prev(pp));
+		}
+		return 0;
+	}
+
+	/* new a partial_page */
+	pp = kmem_cache_alloc(partial_page_cachep, GFP_KERNEL);
+	if (!pp)
+		return -ENOMEM;
+	pp->base = pstart;
+	pp->bitmap = 0;
+	for (i=start_bit; i<end_bit; i++)
+		set_bit(i, &(pp->bitmap));
+	pp->next = NULL;
+	ia32_insert_pp(current->thread.ppl, pp, prev, rb_link, rb_parent);
+	return 0;
+}
+
+/*
+ * locking version of ia32_set_pp().
+ * Use mm->mmap_sem to protect partial_page_list.
+ */
+static void
+ia32_set_pp(unsigned int start, unsigned int end)
+{
+	down_write(&current->mm->mmap_sem);
+	{
+		__ia32_set_pp(start, end);
+	}
+	up_write(&current->mm->mmap_sem);
+}
+
+/*
+ * Unset the range between @start and @end in bitmap.
+ * @start and @end should be IA32 page aligned and in the same IA64 page.
+ * After doing that, if the bitmap is 0, then free the page and return 1,
+ * 	else return 0;
+ * If not find the partial page in the list, then
+ * 	If the vma exists, then the full page is set to a partial page;
+ *	Else return -ENOMEM.
+ */
+static int
+__ia32_unset_pp(unsigned int start, unsigned int end)
+{
+	struct partial_page *pp, *prev;
+	struct rb_node ** rb_link, *rb_parent;
+	unsigned int pstart, start_bit, end_bit, i;
+	struct vm_area_struct *vma;
+
+	pstart = PAGE_START(start);
+	start_bit = (start % PAGE_SIZE) / IA32_PAGE_SIZE;
+	end_bit = (end % PAGE_SIZE) / IA32_PAGE_SIZE;
+	if (end_bit == 0)
+		end_bit = PAGE_SIZE / IA32_PAGE_SIZE;
+
+	pp = ia32_find_pp(current->thread.ppl, pstart, &prev,
+					&rb_link, &rb_parent);
+	if (pp) {
+		for (i = start_bit; i < end_bit; i++)
+			clear_bit(i, &pp->bitmap);
+		if (pp->bitmap == 0) {
+			ia32_delete_pp(current->thread.ppl, pp, pp_prev(pp));
+			return 1;
+		}
+		return 0;
+	}
+
+	vma = find_vma(current->mm, pstart);
+	if (!vma || vma->vm_start > pstart) {
+		return -ENOMEM;
+	}
+
+	/* new a partial_page */
+	pp = kmem_cache_alloc(partial_page_cachep, GFP_KERNEL);
+	if (!pp)
+		return -ENOMEM;
+	pp->base = pstart;
+	pp->bitmap = 0;
+	for (i = 0; i < start_bit; i++)
+		set_bit(i, &(pp->bitmap));
+	for (i = end_bit; i < PAGE_SIZE / IA32_PAGE_SIZE; i++)
+		set_bit(i, &(pp->bitmap));
+	pp->next = NULL;
+	ia32_insert_pp(current->thread.ppl, pp, prev, rb_link, rb_parent);
+	return 0;
+}
+
+/*
+ * locking version of ia32_unset_pp().
+ * Use mm->mmap_sem to protect partial_page_list.
+ */
+static int
+ia32_unset_pp(unsigned int start, unsigned int end)
+{
+	int ret;
+
+	down_write(&current->mm->mmap_sem);
+	{
+		ret = __ia32_unset_pp(start, end);
+	}
+	up_write(&current->mm->mmap_sem);
+
+	return ret;
+}
+
+/*
+ * Compare the range between @start and @end with bitmap in partial page:
+ * Take this as example: the range is the 1st and 2nd 4K page.
+ * Return 0 if they fit bitmap exactly, i.e. bitmap = 00000011;
+ * Return 1 if the range doesn't cover whole bitmap, e.g. bitmap = 00001111;
+ * Return -ENOMEM if the range exceeds the bitmap, e.g. bitmap = 00000001 or
+ * 	bitmap = 00000101.
+ */
+static int
+ia32_compare_pp(unsigned int start, unsigned int end)
+{
+	struct partial_page *pp, *prev;
+	struct rb_node ** rb_link, *rb_parent;
+	unsigned int pstart, start_bit, end_bit, size;
+	unsigned int first_bit, next_zero_bit;	/* the first range in bitmap */
+
+	pstart = PAGE_START(start);
+
+	pp = ia32_find_pp(current->thread.ppl, pstart, &prev,
+					&rb_link, &rb_parent);
+	if (!pp)
+		return 1;
+
+	start_bit = (start % PAGE_SIZE) / IA32_PAGE_SIZE;
+	end_bit = (end % PAGE_SIZE) / IA32_PAGE_SIZE;
+	size = sizeof(pp->bitmap) * 8;
+	first_bit = find_first_bit(&pp->bitmap, size);
+	next_zero_bit = find_next_zero_bit(&pp->bitmap, size, first_bit);
+	if ((start_bit < first_bit) || (end_bit > next_zero_bit)) {
+		/* exceeds the first range in bitmap */
+		return -ENOMEM;
+	} else if ((start_bit == first_bit) && (end_bit == next_zero_bit)) {
+		first_bit = find_next_bit(&pp->bitmap, size, next_zero_bit);
+		if ((next_zero_bit < first_bit) && (first_bit < size))
+			return 1;	/* has next range */
+		else
+			return 0; 	/* no next range */
+	} else
+		return 1;
+}
+
+static void
+ia32_do_drop_pp_list(struct partial_page_list *ppl)
+{
+	struct partial_page *pp = ppl->pp_head;
+
+	while (pp) {
+		struct partial_page *next = pp->next;
+		kmem_cache_free(partial_page_cachep, pp);
+		pp = next;
+	}
+
+	kfree(ppl);
+}
+
+void
+ia32_drop_partial_page_list(struct task_struct *task)
+{
+	struct partial_page_list* ppl = task->thread.ppl;
+
+	if (ppl && atomic_dec_and_test(&ppl->pp_count))
+		ia32_do_drop_pp_list(ppl);
+}
+
+/*
+ * Copy current->thread.ppl to ppl (already initialized).
+ */
+static int
+ia32_do_copy_pp_list(struct partial_page_list *ppl)
+{
+	struct partial_page *pp, *tmp, *prev;
+	struct rb_node **rb_link, *rb_parent;
+
+	ppl->pp_head = NULL;
+	ppl->pp_hint = NULL;
+	ppl->ppl_rb = RB_ROOT;
+	rb_link = &ppl->ppl_rb.rb_node;
+	rb_parent = NULL;
+	prev = NULL;
+
+	for (pp = current->thread.ppl->pp_head; pp; pp = pp->next) {
+		tmp = kmem_cache_alloc(partial_page_cachep, GFP_KERNEL);
+		if (!tmp)
+			return -ENOMEM;
+		*tmp = *pp;
+		ia32_insert_pp(ppl, tmp, prev, rb_link, rb_parent);
+		prev = tmp;
+		rb_link = &tmp->pp_rb.rb_right;
+		rb_parent = &tmp->pp_rb;
+	}
+	return 0;
+}
+
+int
+ia32_copy_partial_page_list(struct task_struct *p, unsigned long clone_flags)
+{
+	int retval = 0;
+
+	if (clone_flags & CLONE_VM) {
+		atomic_inc(&current->thread.ppl->pp_count);
+		p->thread.ppl = current->thread.ppl;
+	} else {
+		p->thread.ppl = ia32_init_pp_list();
+		if (!p->thread.ppl)
+			return -ENOMEM;
+		down_write(&current->mm->mmap_sem);
+		{
+			retval = ia32_do_copy_pp_list(p->thread.ppl);
+		}
+		up_write(&current->mm->mmap_sem);
+	}
+
+	return retval;
+}
+
 static unsigned long
 emulate_mmap (struct file *file, unsigned long start, unsigned long len, int prot, int flags,
 	      loff_t off)
@@ -274,7 +646,7 @@ emulate_mmap (struct file *file, unsigned long start, unsigned long len, int pro
 				return ret;
 			pstart += PAGE_SIZE;
 			if (pstart >= pend)
-				return start;	/* done */
+				goto out;	/* done */
 		}
 		if (end < pend) {
 			if (flags & MAP_SHARED)
@@ -287,7 +659,7 @@ emulate_mmap (struct file *file, unsigned long start, unsigned long len, int pro
 				return ret;
 			pend -= PAGE_SIZE;
 			if (pstart >= pend)
-				return start;	/* done */
+				goto out;	/* done */
 		}
 	} else {
 		/*
@@ -341,6 +713,19 @@ emulate_mmap (struct file *file, unsigned long start, unsigned long len, int pro
 		if (!(prot & PROT_WRITE) && sys_mprotect(pstart, pend - pstart, prot) < 0)
 			return -EINVAL;
 	}
+
+out:
+	if (end < PAGE_ALIGN(start)) {
+		ia32_set_pp((unsigned int)start, (unsigned int)end);
+	} else {
+		if (start > PAGE_START(start)) {
+			ia32_set_pp((unsigned int)start, (unsigned int)PAGE_ALIGN(start));
+		}
+		if (end < PAGE_ALIGN(end)) {
+			ia32_set_pp((unsigned int)PAGE_START(end), (unsigned int)end);
+		}
+	}
+
 	return start;
 }
 
@@ -478,11 +863,45 @@ sys32_munmap (unsigned int start, unsigned int len)
 #if PAGE_SHIFT <= IA32_PAGE_SHIFT
 	ret = sys_munmap(start, end - start);
 #else
+	unsigned int pstart, pend;
+
+	if (OFFSET4K(start))
+		return -EINVAL;
+
+	end = IA32_PAGE_ALIGN(end);
 	if (start >= end)
 		return -EINVAL;
 
-	start = PAGE_ALIGN(start);
-	end = PAGE_START(end);
+	pstart = PAGE_ALIGN(start);
+	pend = PAGE_START(end);
+
+	if (end < PAGE_ALIGN(start)) {
+		ret = ia32_unset_pp((unsigned int)start, (unsigned int)end);
+		if (ret == 1) {
+			start = PAGE_START(start);
+			end = PAGE_ALIGN(end);
+		} else
+			return ret;
+	} else {
+		if (offset_in_page(start)) {
+			ret = ia32_unset_pp((unsigned int)start, (unsigned int)PAGE_ALIGN(start));
+			if (ret == 1)
+				start = PAGE_START(start);
+			else if (ret == 0)
+				start = PAGE_ALIGN(start);
+			else
+				return ret;
+		}
+		if (offset_in_page(end)) {
+			ret = ia32_unset_pp((unsigned int)PAGE_START(end), (unsigned int)end);
+			if (ret == 1)
+				end = PAGE_ALIGN(end);
+			else if (ret == 0)
+				end = PAGE_START(end);
+			else
+				return ret;
+		}
+	}
 
 	if (start >= end)
 		return 0;
@@ -540,6 +959,51 @@ sys32_mprotect (unsigned int start, unsigned int len, int prot)
 
 	down(&ia32_mmap_sem);
 	{
+		if (end < PAGE_ALIGN(start)) {
+			/* start and end are in the same IA64 (partial) page */
+			retval = ia32_compare_pp((unsigned int)start, (unsigned int)end);
+			if (retval < 0)	{
+				/* start~end beyond the mapped area */
+				goto out;
+			}
+			else if (retval == 0) {
+				/* start~end fits the mapped area well */
+				start = PAGE_START(start);
+				end = PAGE_ALIGN(end);
+			}
+			else {
+				/* start~end doesn't cover all mapped area in this IA64 page */
+				/* So call mprotect_subpage to deal with new prot issue */
+				goto subpage;
+			}
+		} else {
+			if (offset_in_page(start)) {
+				retval = ia32_compare_pp((unsigned int)start, (unsigned int)PAGE_ALIGN(start));
+				if (retval < 0)	{
+					goto out;
+				}
+				else if (retval == 0) {
+					start = PAGE_START(start);
+				}
+				else {
+					goto subpage;
+				}
+			}
+			if (offset_in_page(end)) {
+				retval = ia32_compare_pp((unsigned int)PAGE_START(end), (unsigned int)end);
+				if (retval < 0)	{
+					goto out;
+				}
+				else if (retval == 0) {
+					end = PAGE_ALIGN(end);
+				}
+				else {
+					goto subpage;
+				}
+			}
+		}
+
+  subpage:
 		if (offset_in_page(start)) {
 			/* start address is 4KB aligned but not page aligned. */
 			retval = mprotect_subpage(PAGE_START(start), prot);
@@ -567,6 +1031,64 @@ sys32_mprotect (unsigned int start, unsigned int len, int prot)
 #endif
 }
 
+asmlinkage long
+sys32_mremap (unsigned int addr, unsigned int old_len, unsigned int new_len,
+		unsigned int flags, unsigned int new_addr)
+{
+	long ret;
+
+#if PAGE_SHIFT <= IA32_PAGE_SHIFT
+	ret = sys_mremap(addr, old_len, new_len, flags, new_addr);
+#else
+	unsigned int old_end, new_end;
+
+	if (OFFSET4K(addr))
+		return -EINVAL;
+
+	old_len = IA32_PAGE_ALIGN(old_len);
+	new_len = IA32_PAGE_ALIGN(new_len);
+	old_end = addr + old_len;
+	new_end = addr + new_len;
+
+	if (!new_len)
+		return -EINVAL;
+
+	if ((flags & MREMAP_FIXED) && (OFFSET4K(new_addr)))
+			return -EINVAL;
+
+	if (old_len >= new_len) {
+		ret = sys32_munmap(addr + new_len, old_len - new_len);
+		if (ret && old_len != new_len)
+			return ret;
+		ret = addr;
+		if (!(flags & MREMAP_FIXED) || (new_addr == addr))
+			return ret;
+		old_len = new_len;
+	}
+
+	addr = PAGE_START(addr);
+	old_len = PAGE_ALIGN(old_end) - addr;
+	new_len = PAGE_ALIGN(new_end) - addr;
+
+	down(&ia32_mmap_sem);
+	{
+		ret = sys_mremap(addr, old_len, new_len, flags, new_addr);
+	}
+	up(&ia32_mmap_sem);
+
+	if ((ret >= 0) && (old_len < new_len)) {	/* mremap expand successfully */
+		if (new_end <= PAGE_ALIGN(old_end)) {
+			/* old_end and new_end are in the same IA64 page */
+			ia32_set_pp(old_end, new_end);
+		} else {
+			ia32_set_pp((unsigned int)PAGE_START(new_end), new_end);
+			ia32_set_pp(old_end, (unsigned int)PAGE_ALIGN(old_end));
+		}
+	}
+#endif
+	return ret;
+}
+
 asmlinkage long
 sys32_pipe (int *fd)
 {

arch/ia64/kernel/entry.S

@@ -179,17 +179,19 @@ GLOBAL_ENTRY(ia64_switch_to)
 	.body
 
 	adds r22=IA64_TASK_THREAD_KSP_OFFSET,r13
+	movl r25=init_task
 	mov r27=IA64_KR(CURRENT_STACK)
+	adds r21=IA64_TASK_THREAD_KSP_OFFSET,in0
 	dep r20=0,in0,61,3		// physical address of "current"
 	;;
 	st8 [r22]=sp			// save kernel stack pointer of old task
 	shr.u r26=r20,IA64_GRANULE_SHIFT
-	adds r21=IA64_TASK_THREAD_KSP_OFFSET,in0
+	cmp.eq p7,p6=r25,in0
 	;;
 	/*
 	 * If we've already mapped this task's page, we can skip doing it again.
 	 */
-	cmp.eq p7,p6=r26,r27
+(p6)	cmp.eq p7,p6=r26,r27
 (p6)	br.cond.dpnt .map
 	;;
 .done:

arch/ia64/kernel/head.S

@@ -154,6 +154,10 @@ start_ap:
 #endif
 	;;
 	tpa r3=r2		// r3 == phys addr of task struct
+	;;
+	shr.u r16=r3,IA64_GRANULE_SHIFT
+(isBP)	br.cond.dpnt .load_current // BP stack is on region 5 --- no need to map it
+
 	// load mapping for stack (virtaddr in r2, physaddr in r3)
 	rsm psr.ic
 	movl r17=PAGE_KERNEL
@@ -165,7 +169,6 @@ start_ap:
 	dep r2=-1,r3,61,3	// IMVA of task
 	;;
 	mov r17=rr[r2]
-	shr.u r16=r3,IA64_GRANULE_SHIFT
 	;;
 	dep r17=0,r17,8,24
 	;;
@@ -180,6 +183,7 @@ start_ap:
 	srlz.d
   	;;
 
+.load_current:
 	// load the "current" pointer (r13) and ar.k6 with the current task
 	mov IA64_KR(CURRENT)=r2		// virtual address
 	mov IA64_KR(CURRENT_STACK)=r16

arch/ia64/kernel/mca.c

@@ -267,6 +267,8 @@ ia64_mca_log_sal_error_record(int sal_info_type)
  */
 #ifndef PLATFORM_MCA_HANDLERS
 
+#ifdef CONFIG_ACPI
+
 static irqreturn_t
 ia64_mca_cpe_int_handler (int cpe_irq, void *arg, struct pt_regs *ptregs)
 {
@@ -281,6 +283,8 @@ ia64_mca_cpe_int_handler (int cpe_irq, void *arg, struct pt_regs *ptregs)
 	return IRQ_HANDLED;
 }
 
+#endif /* CONFIG_ACPI */
+
 static void
 show_min_state (pal_min_state_area_t *minstate)
 {
@@ -967,6 +971,8 @@ ia64_mca_cmc_poll (unsigned long dummy)
  * Outputs
  * 	handled
  */
+#ifdef CONFIG_ACPI
+
 static irqreturn_t
 ia64_mca_cpe_int_caller(int cpe_irq, void *arg, struct pt_regs *ptregs)
 {
@@ -1003,6 +1009,8 @@ ia64_mca_cpe_int_caller(int cpe_irq, void *arg, struct pt_regs *ptregs)
 	return IRQ_HANDLED;
 }
 
+#endif /* CONFIG_ACPI */
+
 /*
  *  ia64_mca_cpe_poll
  *

arch/ia64/kernel/palinfo.c

@@ -515,10 +515,10 @@ static const char *bus_features[]={
 	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
 	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
 	NULL, NULL, NULL, NULL,
-	"Enable Cache Line Repl. Exclusive",
 	"Enable Cache Line Repl. Shared",
+	"Enable Cache Line Repl. Exclusive",
 	"Disable Transaction Queuing",
-	"Disable Reponse Error Checking",
+	"Disable Response Error Checking",
 	"Disable Bus Error Checking",
 	"Disable Bus Requester Internal Error Signalling",
 	"Disable Bus Requester Error Signalling",

arch/ia64/kernel/process.c

@@ -439,6 +439,10 @@ copy_thread (int nr, unsigned long clone_flags,
 		ia32_save_state(p);
 		if (clone_flags & CLONE_SETTLS)
 			retval = ia32_clone_tls(p, child_ptregs);
+
+		/* Copy partially mapped page list */
+		if (!retval)
+			retval = ia32_copy_partial_page_list(p, clone_flags);
 	}
 #endif
 
@@ -672,6 +676,8 @@ flush_thread (void)
 	/* drop floating-point and debug-register state if it exists: */
 	current->thread.flags &= ~(IA64_THREAD_FPH_VALID | IA64_THREAD_DBG_VALID);
 	ia64_drop_fpu(current);
+	if (IS_IA32_PROCESS(ia64_task_regs(current)))
+		ia32_drop_partial_page_list(current);
 }
 
 /*
@@ -691,6 +697,8 @@ exit_thread (void)
 	if (current->thread.flags & IA64_THREAD_DBG_VALID)
 		pfm_release_debug_registers(current);
 #endif
+	if (IS_IA32_PROCESS(ia64_task_regs(current)))
+		ia32_drop_partial_page_list(current);
 }
 
 unsigned long

arch/ia64/kernel/unwind.c

@@ -385,9 +385,10 @@ unw_access_gr (struct unw_frame_info *info, int regnum, unsigned long *val, char
 	}
 
 	if (write) {
-		if (read_only(addr))
-			UNW_DPRINT(0, "unwind.%s: ignoring attempt to write read-only location\n");
-		else {
+		if (read_only(addr)) {
+			UNW_DPRINT(0, "unwind.%s: ignoring attempt to write read-only location\n",
+				__FUNCTION__);
+		} else {
 			*addr = *val;
 			if (*nat)
 				*nat_addr |= nat_mask;
@@ -432,9 +433,10 @@ unw_access_br (struct unw_frame_info *info, int regnum, unsigned long *val, int
 		return -1;
 	}
 	if (write)
-		if (read_only(addr))
-			UNW_DPRINT(0, "unwind.%s: ignoring attempt to write read-only location\n");
-		else
+		if (read_only(addr)) {
+			UNW_DPRINT(0, "unwind.%s: ignoring attempt to write read-only location\n",
+				__FUNCTION__);
+		} else
 			*addr = *val;
 	else
 		*val = *addr;
@@ -480,9 +482,10 @@ unw_access_fr (struct unw_frame_info *info, int regnum, struct ia64_fpreg *val,
 	}
 
 	if (write)
-		if (read_only(addr))
-			UNW_DPRINT(0, "unwind.%s: ignoring attempt to write read-only location\n");
-		else
+		if (read_only(addr)) {
+			UNW_DPRINT(0, "unwind.%s: ignoring attempt to write read-only location\n",
+				__FUNCTION__);
+		} else
 			*addr = *val;
 	else
 		*val = *addr;
@@ -576,9 +579,10 @@ unw_access_ar (struct unw_frame_info *info, int regnum, unsigned long *val, int
 	}
 
 	if (write) {
-		if (read_only(addr))
-			UNW_DPRINT(0, "unwind.%s: ignoring attempt to write read-only location\n");
-		else
+		if (read_only(addr)) {
+			UNW_DPRINT(0, "unwind.%s: ignoring attempt to write read-only location\n",
+				__FUNCTION__);
+		} else
 			*addr = *val;
 	} else
 		*val = *addr;
@@ -596,9 +600,10 @@ unw_access_pr (struct unw_frame_info *info, unsigned long *val, int write)
 		addr = &info->sw->pr;
 
 	if (write) {
-		if (read_only(addr))
-			UNW_DPRINT(0, "unwind.%s: ignoring attempt to write read-only location\n");
-		else
+		if (read_only(addr)) {
+			UNW_DPRINT(0, "unwind.%s: ignoring attempt to write read-only location\n",
+				__FUNCTION__);
+		} else
 			*addr = *val;
 	} else
 		*val = *addr;

arch/ia64/mm/discontig.c

@@ -154,6 +154,9 @@ static void __init reassign_cpu_only_nodes(void)
 
 	memcpy(numa_slit, numa_slit_fix, sizeof (numa_slit));
 
+	for (i = nnode; i < numnodes; i++)
+		node_set_offline(i);
+
 	numnodes = nnode;
 
 	return;

arch/ia64/sn/io/machvec/pci_bus_cvlink.c

@@ -741,7 +741,7 @@ pci_bus_to_hcl_cvlink(void)
 			/* Is this PCI bus associated with this moduleid? */
 			moduleid = NODE_MODULEID(
 				nasid_to_cnodeid(pcibr_soft->bs_nasid));
-			if (modules[i]->id == moduleid) {
+			if (sn_modules[i]->id == moduleid) {
 				struct pcibr_list_s *new_element;
 
 				new_element = kmalloc(sizeof (struct pcibr_soft_s), GFP_KERNEL);
@@ -781,7 +781,7 @@ pci_bus_to_hcl_cvlink(void)
 				
 		/*
 		 * We now have a list of all the pci bridges associated with
-		 * the module_id, modules[i].  Call pci_bus_map_create() for
+		 * the module_id, sn_modules[i].  Call pci_bus_map_create() for
 		 * each pci bridge
 		 */
 		softlistp = first_in_list;

arch/ia64/sn/io/sn2/klgraph.c

@@ -527,7 +527,7 @@ klhwg_add_all_modules(vertex_hdl_t hwgraph_root)
 		/* Use module as module vertex fastinfo */
 
 		memset(buffer, 0, 16);
-		format_module_id(buffer, modules[cm]->id, MODULE_FORMAT_BRIEF);
+		format_module_id(buffer, sn_modules[cm]->id, MODULE_FORMAT_BRIEF);
 		sprintf(name, EDGE_LBL_MODULE "/%s", buffer);
 
 		rc = hwgraph_path_add(hwgraph_root, name, &module_vhdl);
@@ -535,7 +535,7 @@ klhwg_add_all_modules(vertex_hdl_t hwgraph_root)
 		rc = rc;
 		HWGRAPH_DEBUG(__FILE__, __FUNCTION__, __LINE__, module_vhdl, NULL, "Created module path.\n");
 
-		hwgraph_fastinfo_set(module_vhdl, (arbitrary_info_t) modules[cm]);
+		hwgraph_fastinfo_set(module_vhdl, (arbitrary_info_t) sn_modules[cm]);
 
 		/* Add system controller */
 		sprintf(name,

arch/ia64/sn/io/sn2/module.c

@@ -33,7 +33,7 @@
 #define DPRINTF(x...)
 #endif
 
-module_t	       *modules[MODULE_MAX];
+module_t	       *sn_modules[MODULE_MAX];
 int			nummodules;
 
 #define SN00_SERIAL_FUDGE	0x3b1af409d513c2
@@ -59,9 +59,9 @@ module_lookup(moduleid_t id)
     int			i;
 
     for (i = 0; i < nummodules; i++)
-	if (modules[i]->id == id) {
-	    DPRINTF("module_lookup: found m=0x%p\n", modules[i]);
-	    return modules[i];
+	if (sn_modules[i]->id == id) {
+	    DPRINTF("module_lookup: found m=0x%p\n", sn_modules[i]);
+	    return sn_modules[i];
 	}
 
     return NULL;
@@ -104,10 +104,10 @@ module_add_node(geoid_t geoid, cnodeid_t cnodeid)
 
 	/* Insert in sorted order by module number */
 
-	for (i = nummodules; i > 0 && modules[i - 1]->id > moduleid; i--)
-	    modules[i] = modules[i - 1];
+	for (i = nummodules; i > 0 && sn_modules[i - 1]->id > moduleid; i--)
+	    sn_modules[i] = sn_modules[i - 1];
 
-	modules[i] = m;
+	sn_modules[i] = m;
 	nummodules++;
     }
 

arch/ia64/sn/kernel/setup.c

@@ -226,7 +226,25 @@ sn_check_for_wars(void)
 			shub_1_1_found = 1;
 }
 
-
+/**
+ * sn_set_error_handling_features - Tell the SN prom how to handle certain
+ * error types.
+ */
+static void __init
+sn_set_error_handling_features(void)
+{
+	u64 ret;
+	u64 sn_ehf_bits[7];	/* see ia64_sn_set_error_handling_features */
+	memset(sn_ehf_bits, 0, sizeof(sn_ehf_bits));
+#define EHF(x) __set_bit(SN_SAL_EHF_ ## x, sn_ehf_bits)
+	EHF(MCA_SLV_TO_OS_INIT_SLV);
+	EHF(NO_RZ_TLBC);
+	// Uncomment once Jesse's code goes in - EHF(NO_RZ_IO_READ); 
+#undef	EHF
+	ret = ia64_sn_set_error_handling_features(sn_ehf_bits);
+	if (ret)
+		printk(KERN_ERR "%s: failed, return code %ld\n", __FUNCTION__, ret);
+}
 
 /**
  * sn_setup - SN platform setup routine
@@ -318,6 +336,9 @@ sn_setup(char **cmdline_p)
 		       master_node_bedrock_address);
 	}
 
+	/* Tell the prom how to handle certain error types */
+	sn_set_error_handling_features();
+
 	/*
 	 * we set the default root device to /dev/hda
 	 * to make simulation easy

include/asm-ia64/ia32.h

@@ -6,7 +6,8 @@
 #include <asm/ptrace.h>
 #include <asm/signal.h>
 
-#define IA32_NR_syscalls		283 /* length of syscall table */
+#define IA32_NR_syscalls		283	/* length of syscall table */
+#define IA32_PAGE_SHIFT			12	/* 4KB pages */
 
 #ifndef __ASSEMBLY__
 
@@ -24,6 +25,13 @@ extern int ia32_clone_tls (struct task_struct *child, struct pt_regs *childregs)
 /* Declare this unconditionally, so we don't get warnings for unreachable code.  */
 extern int ia32_setup_frame1 (int sig, struct k_sigaction *ka, siginfo_t *info,
 			      sigset_t *set, struct pt_regs *regs);
+#if PAGE_SHIFT > IA32_PAGE_SHIFT
+extern int ia32_copy_partial_page_list (struct task_struct *, unsigned long);
+extern void ia32_drop_partial_page_list (struct task_struct *);
+#else
+# define ia32_copy_partial_page_list(a1, a2)	0
+# define ia32_drop_partial_page_list(a1)	do { ; } while (0)
+#endif
 
 #endif /* !__ASSEMBLY__ */
 

include/asm-ia64/pgtable.h

@@ -297,11 +297,7 @@ ia64_phys_addr_valid (unsigned long addr)
  * works bypasses the caches, but does allow for consecutive writes to
  * be combined into single (but larger) write transactions.
  */
-#ifdef CONFIG_MCKINLEY_A0_SPECIFIC
-# define pgprot_writecombine(prot)	prot
-#else
-# define pgprot_writecombine(prot)	__pgprot((pgprot_val(prot) & ~_PAGE_MA_MASK) | _PAGE_MA_WC)
-#endif
+#define pgprot_writecombine(prot)	__pgprot((pgprot_val(prot) & ~_PAGE_MA_MASK) | _PAGE_MA_WC)
 
 static inline unsigned long
 pgd_index (unsigned long address)

include/asm-ia64/processor.h

@@ -230,6 +230,7 @@ struct desc_struct {
 
 #define TLS_SIZE (GDT_ENTRY_TLS_ENTRIES * 8)
 
+struct partial_page_list;
 #endif
 
 struct thread_struct {
@@ -251,6 +252,7 @@ struct thread_struct {
 	__u64 fdr;			/* IA32 fp except. data reg */
 	__u64 old_k1;			/* old value of ar.k1 */
 	__u64 old_iob;			/* old IOBase value */
+	struct partial_page_list *ppl;	/* partial page list for 4K page size issue */
         /* cached TLS descriptors. */
 	struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
 
@@ -260,7 +262,8 @@ struct thread_struct {
 				.fir =		0,			\
 				.fdr =		0,			\
 				.old_k1 =	0,			\
-				.old_iob =	0,
+				.old_iob =	0,			\
+				.ppl =		0,
 #else
 # define INIT_THREAD_IA32
 #endif /* CONFIG_IA32_SUPPORT */

include/asm-ia64/sn/module.h

@@ -180,7 +180,7 @@ struct module_s {
 };
 
 /* module.c */
-extern module_t	       *modules[MODULE_MAX];	/* Indexed by cmoduleid_t   */
+extern module_t	       *sn_modules[MODULE_MAX];	/* Indexed by cmoduleid_t   */
 extern int		nummodules;
 
 extern module_t	       *module_lookup(moduleid_t id);

include/asm-ia64/sn/sn_sal.h

@@ -33,6 +33,7 @@
 #define  SN_SAL_NO_FAULT_ZONE_VIRTUAL		   0x02000010
 #define  SN_SAL_NO_FAULT_ZONE_PHYSICAL		   0x02000011
 #define  SN_SAL_PRINT_ERROR			   0x02000012
+#define  SN_SAL_SET_ERROR_HANDLING_FEATURES	   0x0200001a	// reentrant
 #define  SN_SAL_CONSOLE_PUTC                       0x02000021
 #define  SN_SAL_CONSOLE_GETC                       0x02000022
 #define  SN_SAL_CONSOLE_PUTS                       0x02000023
@@ -92,6 +93,19 @@
 #define SALRET_INVALID_ARG	-2
 #define SALRET_ERROR		-3
 
+/*
+ * SN_SAL_SET_ERROR_HANDLING_FEATURES bit settings
+ */
+enum 
+{
+	/* if "rz always" is set, have the mca slaves call os_init_slave */
+	SN_SAL_EHF_MCA_SLV_TO_OS_INIT_SLV=0,
+	/* do not rz on tlb checks, even if "rz always" is set */
+	SN_SAL_EHF_NO_RZ_TLBC,
+	/* do not rz on PIO reads to I/O space, even if "rz always" is set */
+	SN_SAL_EHF_NO_RZ_IO_READ,
+};
+
 
 /**
  * sn_sal_rev_major - get the major SGI SAL revision number
@@ -670,4 +684,24 @@ ia64_sn_sysctl_iobrick_pci_op(nasid_t n, u64 connection_type,
 	return 0;
 }
 
+/*
+ * Tell the prom how the OS wants to handle specific error features.
+ * It takes an array of 7 u64.
+ */
+static inline u64
+ia64_sn_set_error_handling_features(const u64 *feature_bits)
+{
+	struct ia64_sal_retval rv = {0, 0, 0, 0};
+
+	SAL_CALL_REENTRANT(rv, SN_SAL_SET_ERROR_HANDLING_FEATURES,
+			feature_bits[0],
+			feature_bits[1],
+			feature_bits[2],
+			feature_bits[3],
+			feature_bits[4],
+			feature_bits[5],
+			feature_bits[6]);
+	return rv.status;
+}
+
 #endif /* _ASM_IA64_SN_SN_SAL_H */