Merge branch 'master' into upstream

21 files changed, 350 insertions, 214 deletions

diff --git a/arch/um/Kconfig b/arch/um/Kconfig
index 05fbb20636c..76e85bbaea5 100644
--- a/arch/um/Kconfig
+++ b/arch/um/Kconfig
@@ -57,20 +57,6 @@ config STATIC_LINK
 	chroot, and you disable CONFIG_MODE_TT, you probably want to say Y
 	here.
 
-config HOST_2G_2G
-	bool "2G/2G host address space split"
-	default n
-	depends on MODE_TT
-	help
-	This is needed when the host on which you run has a 2G/2G memory
-	split, instead of the customary 3G/1G.
-
-	Note that to enable such a host
-	configuration, which makes sense only in some cases, you need special
-	host patches.
-
-	So, if you do not know what to do here, say 'N'.
-
 config KERNEL_HALF_GIGS
 	int "Kernel address space size (in .5G units)"
 	default "1"
diff --git a/arch/um/Kconfig.i386 b/arch/um/Kconfig.i386
index 85e6a55b3b5..f6eb72d117b 100644
--- a/arch/um/Kconfig.i386
+++ b/arch/um/Kconfig.i386
@@ -16,6 +16,19 @@ config SEMAPHORE_SLEEPERS
 	bool
 	default y
 
+config HOST_2G_2G
+	bool "2G/2G host address space split"
+	default n
+	help
+	This is needed when the host on which you run has a 2G/2G memory
+	split, instead of the customary 3G/1G.
+
+	Note that to enable such a host
+	configuration, which makes sense only in some cases, you need special
+	host patches.
+
+	So, if you do not know what to do here, say 'N'.
+
 config TOP_ADDR
  	hex
  	default 0xc0000000 if !HOST_2G_2G
@@ -35,11 +48,13 @@ config 3_LEVEL_PGTABLES
 
 config STUB_CODE
 	hex
-	default 0xbfffe000
+	default 0xbfffe000 if !HOST_2G_2G
+	default 0x7fffe000 if HOST_2G_2G
 
 config STUB_DATA
 	hex
-	default 0xbffff000
+	default 0xbffff000 if !HOST_2G_2G
+	default 0x7ffff000 if HOST_2G_2G
 
 config STUB_START
 	hex
diff --git a/arch/um/Makefile b/arch/um/Makefile
index a508e7a0289..f6ad832faf1 100644
--- a/arch/um/Makefile
+++ b/arch/um/Makefile
@@ -96,7 +96,8 @@ PHONY += linux
 all: linux
 
 linux: vmlinux
-	ln -f $< $@
+	@echo '  LINK $@'
+	$(Q)ln -f $< $@
 
 define archhelp
   echo '* linux		- Binary kernel image (./linux) - for backward'
@@ -117,6 +118,10 @@ prepare: $(ARCH_DIR)/include/kern_constants.h
 LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
 LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib
 
+CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \
+	$(call cc-option, -fno-stack-protector,) \
+	$(call cc-option, -fno-stack-protector-all,)
+
 CPP_MODE-$(CONFIG_MODE_TT) := -DMODE_TT
 CONFIG_KERNEL_STACK_ORDER ?= 2
 STACK_SIZE := $(shell echo $$[ 4096 * (1 << $(CONFIG_KERNEL_STACK_ORDER)) ] )
@@ -203,8 +208,8 @@ endef
 $(ARCH_DIR)/include/uml-config.h : include/linux/autoconf.h
 	$(call filechk,umlconfig)
 
-$(ARCH_DIR)/user-offsets.s: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.c
-	$(CC) $(USER_CFLAGS) -S -o $@ $<
+$(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s: FORCE
+	$(Q)$(MAKE) $(build)=$(ARCH_DIR)/sys-$(SUBARCH) $@
 
 define filechk_gen-asm-offsets
         (set -e; \
@@ -219,13 +224,11 @@ define filechk_gen-asm-offsets
          echo ""; )
 endef
 
-$(ARCH_DIR)/include/user_constants.h: $(ARCH_DIR)/user-offsets.s
+$(ARCH_DIR)/include/user_constants.h: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s
 	$(call filechk,gen-asm-offsets)
 
-CLEAN_FILES += $(ARCH_DIR)/user-offsets.s
-
 $(ARCH_DIR)/include/kern_constants.h: $(objtree)/$(ARCH_DIR)/include
 	@echo '  SYMLINK $@'
-	$(Q) ln -sf ../../../include/asm-um/asm-offsets.h $@
+	$(Q)ln -sf ../../../include/asm-um/asm-offsets.h $@
 
-export SUBARCH USER_CFLAGS OS
+export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS
diff --git a/arch/um/defconfig b/arch/um/defconfig
index 80d30d19d75..402a74dc502 100644
--- a/arch/um/defconfig
+++ b/arch/um/defconfig
@@ -1,14 +1,13 @@
 #
 # Automatically generated make config: don't edit
-# Linux kernel version: 2.6.12-rc6-mm1
-# Tue Jun 14 18:22:21 2005
+# Linux kernel version: 2.6.17-rc3
+# Fri Apr 28 09:31:20 2006
 #
 CONFIG_GENERIC_HARDIRQS=y
 CONFIG_UML=y
 CONFIG_MMU=y
-CONFIG_UID16=y
-CONFIG_RWSEM_GENERIC_SPINLOCK=y
 CONFIG_GENERIC_CALIBRATE_DELAY=y
+CONFIG_IRQ_RELEASE_METHOD=y
 
 #
 # UML-specific options
@@ -16,8 +15,50 @@ CONFIG_GENERIC_CALIBRATE_DELAY=y
 # CONFIG_MODE_TT is not set
 # CONFIG_STATIC_LINK is not set
 CONFIG_MODE_SKAS=y
+
+#
+# Host processor type and features
+#
+# CONFIG_M386 is not set
+# CONFIG_M486 is not set
+# CONFIG_M586 is not set
+# CONFIG_M586TSC is not set
+# CONFIG_M586MMX is not set
+CONFIG_M686=y
+# CONFIG_MPENTIUMII is not set
+# CONFIG_MPENTIUMIII is not set
+# CONFIG_MPENTIUMM is not set
+# CONFIG_MPENTIUM4 is not set
+# CONFIG_MK6 is not set
+# CONFIG_MK7 is not set
+# CONFIG_MK8 is not set
+# CONFIG_MCRUSOE is not set
+# CONFIG_MEFFICEON is not set
+# CONFIG_MWINCHIPC6 is not set
+# CONFIG_MWINCHIP2 is not set
+# CONFIG_MWINCHIP3D is not set
+# CONFIG_MGEODEGX1 is not set
+# CONFIG_MGEODE_LX is not set
+# CONFIG_MCYRIXIII is not set
+# CONFIG_MVIAC3_2 is not set
+# CONFIG_X86_GENERIC is not set
+CONFIG_X86_CMPXCHG=y
+CONFIG_X86_XADD=y
+CONFIG_X86_L1_CACHE_SHIFT=5
+CONFIG_RWSEM_XCHGADD_ALGORITHM=y
+CONFIG_X86_PPRO_FENCE=y
+CONFIG_X86_WP_WORKS_OK=y
+CONFIG_X86_INVLPG=y
+CONFIG_X86_BSWAP=y
+CONFIG_X86_POPAD_OK=y
+CONFIG_X86_CMPXCHG64=y
+CONFIG_X86_GOOD_APIC=y
+CONFIG_X86_USE_PPRO_CHECKSUM=y
+CONFIG_X86_TSC=y
 CONFIG_UML_X86=y
 # CONFIG_64BIT is not set
+CONFIG_SEMAPHORE_SLEEPERS=y
+# CONFIG_HOST_2G_2G is not set
 CONFIG_TOP_ADDR=0xc0000000
 # CONFIG_3_LEVEL_PGTABLES is not set
 CONFIG_STUB_CODE=0xbfffe000
@@ -25,22 +66,24 @@ CONFIG_STUB_DATA=0xbffff000
 CONFIG_STUB_START=0xbfffe000
 CONFIG_ARCH_HAS_SC_SIGNALS=y
 CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA=y
+CONFIG_GENERIC_HWEIGHT=y
 CONFIG_SELECT_MEMORY_MODEL=y
 CONFIG_FLATMEM_MANUAL=y
 # CONFIG_DISCONTIGMEM_MANUAL is not set
 # CONFIG_SPARSEMEM_MANUAL is not set
 CONFIG_FLATMEM=y
 CONFIG_FLAT_NODE_MEM_MAP=y
+# CONFIG_SPARSEMEM_STATIC is not set
+CONFIG_SPLIT_PTLOCK_CPUS=4
 CONFIG_LD_SCRIPT_DYN=y
 CONFIG_NET=y
 CONFIG_BINFMT_ELF=y
 CONFIG_BINFMT_MISC=m
 # CONFIG_HOSTFS is not set
+# CONFIG_HPPFS is not set
 CONFIG_MCONSOLE=y
 # CONFIG_MAGIC_SYSRQ is not set
-# CONFIG_HOST_2G_2G is not set
 CONFIG_NEST_LEVEL=0
-CONFIG_KERNEL_HALF_GIGS=1
 # CONFIG_HIGHMEM is not set
 CONFIG_KERNEL_STACK_ORDER=2
 CONFIG_UML_REAL_TIME_CLOCK=y
@@ -49,7 +92,6 @@ CONFIG_UML_REAL_TIME_CLOCK=y
 # Code maturity level options
 #
 CONFIG_EXPERIMENTAL=y
-CONFIG_CLEAN_COMPILE=y
 CONFIG_BROKEN_ON_SMP=y
 CONFIG_INIT_ENV_ARG_LIMIT=32
 
@@ -57,6 +99,7 @@ CONFIG_INIT_ENV_ARG_LIMIT=32
 # General setup
 #
 CONFIG_LOCALVERSION=""
+CONFIG_LOCALVERSION_AUTO=y
 CONFIG_SWAP=y
 CONFIG_SYSVIPC=y
 CONFIG_POSIX_MQUEUE=y
@@ -64,26 +107,28 @@ CONFIG_BSD_PROCESS_ACCT=y
 # CONFIG_BSD_PROCESS_ACCT_V3 is not set
 CONFIG_SYSCTL=y
 # CONFIG_AUDIT is not set
-# CONFIG_HOTPLUG is not set
-CONFIG_KOBJECT_UEVENT=y
 CONFIG_IKCONFIG=y
 CONFIG_IKCONFIG_PROC=y
+# CONFIG_RELAY is not set
+CONFIG_INITRAMFS_SOURCE=""
+CONFIG_UID16=y
+CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 # CONFIG_EMBEDDED is not set
 CONFIG_KALLSYMS=y
 # CONFIG_KALLSYMS_ALL is not set
 CONFIG_KALLSYMS_EXTRA_PASS=y
+CONFIG_HOTPLUG=y
 CONFIG_PRINTK=y
 CONFIG_BUG=y
+CONFIG_ELF_CORE=y
 CONFIG_BASE_FULL=y
 CONFIG_FUTEX=y
 CONFIG_EPOLL=y
 CONFIG_SHMEM=y
-CONFIG_CC_ALIGN_FUNCTIONS=0
-CONFIG_CC_ALIGN_LABELS=0
-CONFIG_CC_ALIGN_LOOPS=0
-CONFIG_CC_ALIGN_JUMPS=0
+CONFIG_SLAB=y
 # CONFIG_TINY_SHMEM is not set
 CONFIG_BASE_SMALL=0
+# CONFIG_SLOB is not set
 
 #
 # Loadable module support
@@ -91,18 +136,43 @@ CONFIG_BASE_SMALL=0
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
 # CONFIG_MODULE_FORCE_UNLOAD is not set
-CONFIG_OBSOLETE_MODPARM=y
 # CONFIG_MODVERSIONS is not set
 # CONFIG_MODULE_SRCVERSION_ALL is not set
 CONFIG_KMOD=y
 
 #
-# Generic Driver Options
+# Block layer
 #
-CONFIG_STANDALONE=y
-CONFIG_PREVENT_FIRMWARE_BUILD=y
-# CONFIG_FW_LOADER is not set
-# CONFIG_DEBUG_DRIVER is not set
+# CONFIG_LBD is not set
+# CONFIG_BLK_DEV_IO_TRACE is not set
+# CONFIG_LSF is not set
+
+#
+# IO Schedulers
+#
+CONFIG_IOSCHED_NOOP=y
+CONFIG_IOSCHED_AS=y
+CONFIG_IOSCHED_DEADLINE=y
+CONFIG_IOSCHED_CFQ=y
+CONFIG_DEFAULT_AS=y
+# CONFIG_DEFAULT_DEADLINE is not set
+# CONFIG_DEFAULT_CFQ is not set
+# CONFIG_DEFAULT_NOOP is not set
+CONFIG_DEFAULT_IOSCHED="anticipatory"
+
+#
+# Block devices
+#
+CONFIG_BLK_DEV_UBD=y
+# CONFIG_BLK_DEV_UBD_SYNC is not set
+CONFIG_BLK_DEV_COW_COMMON=y
+# CONFIG_MMAPPER is not set
+CONFIG_BLK_DEV_LOOP=m
+# CONFIG_BLK_DEV_CRYPTOLOOP is not set
+CONFIG_BLK_DEV_NBD=m
+# CONFIG_BLK_DEV_RAM is not set
+# CONFIG_BLK_DEV_INITRD is not set
+# CONFIG_ATA_OVER_ETH is not set
 
 #
 # Character Devices
@@ -127,50 +197,23 @@ CONFIG_UML_SOUND=m
 CONFIG_SOUND=m
 CONFIG_HOSTAUDIO=m
 CONFIG_UML_RANDOM=y
-# CONFIG_MMAPPER is not set
-
-#
-# Block devices
-#
-CONFIG_BLK_DEV_UBD=y
-CONFIG_BLK_DEV_UBD_SYNC=y
-CONFIG_BLK_DEV_COW_COMMON=y
-CONFIG_BLK_DEV_LOOP=m
-# CONFIG_BLK_DEV_CRYPTOLOOP is not set
-CONFIG_BLK_DEV_NBD=m
-# CONFIG_BLK_DEV_RAM is not set
-CONFIG_BLK_DEV_RAM_COUNT=16
-CONFIG_INITRAMFS_SOURCE=""
-# CONFIG_LBD is not set
-
-#
-# IO Schedulers
-#
-CONFIG_IOSCHED_NOOP=y
-CONFIG_IOSCHED_AS=y
-CONFIG_IOSCHED_DEADLINE=y
-CONFIG_IOSCHED_CFQ=y
-# CONFIG_ATA_OVER_ETH is not set
-CONFIG_NETDEVICES=y
 
 #
-# UML Network Devices
+# Generic Driver Options
 #
-CONFIG_UML_NET=y
-CONFIG_UML_NET_ETHERTAP=y
-CONFIG_UML_NET_TUNTAP=y
-CONFIG_UML_NET_SLIP=y
-CONFIG_UML_NET_DAEMON=y
-CONFIG_UML_NET_MCAST=y
-CONFIG_UML_NET_SLIRP=y
+CONFIG_STANDALONE=y
+CONFIG_PREVENT_FIRMWARE_BUILD=y
+# CONFIG_FW_LOADER is not set
+# CONFIG_DEBUG_DRIVER is not set
 
 #
-# Networking support
+# Networking
 #
 
 #
 # Networking options
 #
+# CONFIG_NETDEBUG is not set
 CONFIG_PACKET=y
 CONFIG_PACKET_MMAP=y
 CONFIG_UNIX=y
@@ -178,6 +221,7 @@ CONFIG_UNIX=y
 CONFIG_INET=y
 # CONFIG_IP_MULTICAST is not set
 # CONFIG_IP_ADVANCED_ROUTER is not set
+CONFIG_IP_FIB_HASH=y
 # CONFIG_IP_PNP is not set
 # CONFIG_NET_IPIP is not set
 # CONFIG_NET_IPGRE is not set
@@ -186,27 +230,31 @@ CONFIG_INET=y
 # CONFIG_INET_AH is not set
 # CONFIG_INET_ESP is not set
 # CONFIG_INET_IPCOMP is not set
+# CONFIG_INET_XFRM_TUNNEL is not set
 # CONFIG_INET_TUNNEL is not set
-CONFIG_IP_TCPDIAG=y
-# CONFIG_IP_TCPDIAG_IPV6 is not set
-
-#
-# TCP congestion control
-#
+CONFIG_INET_DIAG=y
+CONFIG_INET_TCP_DIAG=y
+# CONFIG_TCP_CONG_ADVANCED is not set
 CONFIG_TCP_CONG_BIC=y
-CONFIG_TCP_CONG_WESTWOOD=y
-CONFIG_TCP_CONG_HTCP=y
-# CONFIG_TCP_CONG_HSTCP is not set
-# CONFIG_TCP_CONG_HYBLA is not set
-# CONFIG_TCP_CONG_VEGAS is not set
-# CONFIG_TCP_CONG_SCALABLE is not set
 # CONFIG_IPV6 is not set
+# CONFIG_INET6_XFRM_TUNNEL is not set
+# CONFIG_INET6_TUNNEL is not set
 # CONFIG_NETFILTER is not set
 
 #
+# DCCP Configuration (EXPERIMENTAL)
+#
+# CONFIG_IP_DCCP is not set
+
+#
 # SCTP Configuration (EXPERIMENTAL)
 #
 # CONFIG_IP_SCTP is not set
+
+#
+# TIPC Configuration (EXPERIMENTAL)
+#
+# CONFIG_TIPC is not set
 # CONFIG_ATM is not set
 # CONFIG_BRIDGE is not set
 # CONFIG_VLAN_8021Q is not set
@@ -224,27 +272,47 @@ CONFIG_TCP_CONG_HTCP=y
 # QoS and/or fair queueing
 #
 # CONFIG_NET_SCHED is not set
-# CONFIG_NET_CLS_ROUTE is not set
 
 #
 # Network testing
 #
 # CONFIG_NET_PKTGEN is not set
-# CONFIG_KGDBOE is not set
-# CONFIG_NETPOLL is not set
-# CONFIG_NETPOLL_RX is not set
-# CONFIG_NETPOLL_TRAP is not set
-# CONFIG_NET_POLL_CONTROLLER is not set
 # CONFIG_HAMRADIO is not set
 # CONFIG_IRDA is not set
 # CONFIG_BT is not set
 # CONFIG_IEEE80211 is not set
+
+#
+# UML Network Devices
+#
+CONFIG_UML_NET=y
+CONFIG_UML_NET_ETHERTAP=y
+CONFIG_UML_NET_TUNTAP=y
+CONFIG_UML_NET_SLIP=y
+CONFIG_UML_NET_DAEMON=y
+CONFIG_UML_NET_MCAST=y
+# CONFIG_UML_NET_PCAP is not set
+CONFIG_UML_NET_SLIRP=y
+
+#
+# Network device support
+#
+CONFIG_NETDEVICES=y
 CONFIG_DUMMY=m
 # CONFIG_BONDING is not set
 # CONFIG_EQUALIZER is not set
 CONFIG_TUN=m
 
 #
+# PHY device support
+#
+
+#
+# Wireless LAN (non-hamradio)
+#
+# CONFIG_NET_RADIO is not set
+
+#
 # Wan interfaces
 #
 # CONFIG_WAN is not set
@@ -263,6 +331,13 @@ CONFIG_SLIP=m
 # CONFIG_SLIP_MODE_SLIP6 is not set
 # CONFIG_SHAPER is not set
 # CONFIG_NETCONSOLE is not set
+# CONFIG_NETPOLL is not set
+# CONFIG_NET_POLL_CONTROLLER is not set
+
+#
+# Connector - unified userspace <-> kernelspace linker
+#
+# CONFIG_CONNECTOR is not set
 
 #
 # File systems
@@ -274,17 +349,14 @@ CONFIG_EXT3_FS=y
 # CONFIG_EXT3_FS_XATTR is not set
 CONFIG_JBD=y
 # CONFIG_JBD_DEBUG is not set
-# CONFIG_REISER4_FS is not set
 CONFIG_REISERFS_FS=y
 # CONFIG_REISERFS_CHECK is not set
 # CONFIG_REISERFS_PROC_INFO is not set
 # CONFIG_REISERFS_FS_XATTR is not set
 # CONFIG_JFS_FS is not set
-
-#
-# XFS support
-#
+# CONFIG_FS_POSIX_ACL is not set
 # CONFIG_XFS_FS is not set
+# CONFIG_OCFS2_FS is not set
 # CONFIG_MINIX_FS is not set
 # CONFIG_ROMFS_FS is not set
 CONFIG_INOTIFY=y
@@ -295,11 +367,6 @@ CONFIG_QUOTACTL=y
 CONFIG_DNOTIFY=y
 CONFIG_AUTOFS_FS=m
 CONFIG_AUTOFS4_FS=m
-
-#
-# Caches
-#
-# CONFIG_FSCACHE is not set
 # CONFIG_FUSE_FS is not set
 
 #
@@ -323,14 +390,10 @@ CONFIG_JOLIET=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
-# CONFIG_TMPFS_XATTR is not set
 # CONFIG_HUGETLB_PAGE is not set
 CONFIG_RAMFS=y
 # CONFIG_CONFIGFS_FS is not set
-# CONFIG_RELAYFS_FS is not set
 
 #
 # Miscellaneous filesystems
@@ -430,6 +493,7 @@ CONFIG_NLS_DEFAULT="iso8859-1"
 # Library routines
 #
 # CONFIG_CRC_CCITT is not set
+# CONFIG_CRC16 is not set
 CONFIG_CRC32=m
 # CONFIG_LIBCRC32C is not set
 
@@ -448,12 +512,18 @@ CONFIG_LOG_BUF_SHIFT=14
 CONFIG_DETECT_SOFTLOCKUP=y
 # CONFIG_SCHEDSTATS is not set
 CONFIG_DEBUG_SLAB=y
+# CONFIG_DEBUG_SLAB_LEAK is not set
+# CONFIG_DEBUG_MUTEXES is not set
 # CONFIG_DEBUG_SPINLOCK is not set
 # CONFIG_DEBUG_SPINLOCK_SLEEP is not set
 # CONFIG_DEBUG_KOBJECT is not set
 CONFIG_DEBUG_INFO=y
 # CONFIG_DEBUG_FS is not set
+# CONFIG_DEBUG_VM is not set
 CONFIG_FRAME_POINTER=y
+# CONFIG_UNWIND_INFO is not set
+CONFIG_FORCED_INLINING=y
+# CONFIG_RCU_TORTURE_TEST is not set
 # CONFIG_GPROF is not set
 # CONFIG_GCOV is not set
 # CONFIG_SYSCALL_DEBUG is not set
diff --git a/arch/um/drivers/cow_user.c b/arch/um/drivers/cow_user.c
index 6ab852bfcd3..0ec4052db9c 100644
--- a/arch/um/drivers/cow_user.c
+++ b/arch/um/drivers/cow_user.c
@@ -100,7 +100,7 @@ struct cow_header_v3_broken {
 	__u32 alignment;
 	__u32 cow_format;
 	char backing_file[PATH_LEN_V3];
-} __attribute__((packed));
+};
 
 /* COW format definitions - for now, we have only the usual COW bitmap */
 #define COW_BITMAP 0
diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c
index c39ea3abeda..2ffda012385 100644
--- a/arch/um/kernel/irq.c
+++ b/arch/um/kernel/irq.c
@@ -89,16 +89,18 @@ void sigio_handler(int sig, union uml_pt_regs *regs)
 	struct irq_fd *irq_fd;
 	int n;
 
-	if(smp_sigio_handler()) return;
-	while(1){
+	if (smp_sigio_handler())
+		return;
+
+	while (1) {
 		n = os_waiting_for_events(active_fds);
 		if (n <= 0) {
 			if(n == -EINTR) continue;
 			else break;
 		}
 
-		for(irq_fd = active_fds; irq_fd != NULL; irq_fd = irq_fd->next){
-			if(irq_fd->current_events != 0){
+		for (irq_fd = active_fds; irq_fd != NULL; irq_fd = irq_fd->next) {
+			if (irq_fd->current_events != 0) {
 				irq_fd->current_events = 0;
 				do_IRQ(irq_fd->irq, regs);
 			}
@@ -110,19 +112,17 @@ void sigio_handler(int sig, union uml_pt_regs *regs)
 
 static void maybe_sigio_broken(int fd, int type)
 {
-	if(os_isatty(fd)){
-		if((type == IRQ_WRITE) && !pty_output_sigio){
+	if (os_isatty(fd)) {
+		if ((type == IRQ_WRITE) && !pty_output_sigio) {
 			write_sigio_workaround();
 			add_sigio_fd(fd, 0);
-		}
-		else if((type == IRQ_READ) && !pty_close_sigio){
+		} else if ((type == IRQ_READ) && !pty_close_sigio) {
 			write_sigio_workaround();
 			add_sigio_fd(fd, 1);
 		}
 	}
 }
 
-
 int activate_fd(int irq, int fd, int type, void *dev_id)
 {
 	struct pollfd *tmp_pfd;
@@ -132,16 +132,18 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
 
 	pid = os_getpid();
 	err = os_set_fd_async(fd, pid);
-	if(err < 0)
+	if (err < 0)
 		goto out;
 
 	new_fd = um_kmalloc(sizeof(*new_fd));
 	err = -ENOMEM;
-	if(new_fd == NULL)
+	if (new_fd == NULL)
 		goto out;
 
-	if(type == IRQ_READ) events = UM_POLLIN | UM_POLLPRI;
-	else events = UM_POLLOUT;
+	if (type == IRQ_READ)
+		events = UM_POLLIN | UM_POLLPRI;
+	else
+		events = UM_POLLOUT;
 	*new_fd = ((struct irq_fd) { .next  		= NULL,
 				     .id 		= dev_id,
 				     .fd 		= fd,
@@ -165,8 +167,8 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
 	 * a semaphore.
 	 */
 	flags = irq_lock();
-	for(irq_fd = active_fds; irq_fd != NULL; irq_fd = irq_fd->next){
-		if((irq_fd->fd == fd) && (irq_fd->type == type)){
+	for (irq_fd = active_fds; irq_fd != NULL; irq_fd = irq_fd->next) {
+		if ((irq_fd->fd == fd) && (irq_fd->type == type)) {
 			printk("Registering fd %d twice\n", fd);
 			printk("Irqs : %d, %d\n", irq_fd->irq, irq);
 			printk("Ids : 0x%p, 0x%p\n", irq_fd->id, dev_id);
@@ -175,13 +177,13 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
 	}
 
 	/*-------------*/
-	if(type == IRQ_WRITE)
+	if (type == IRQ_WRITE)
 		fd = -1;
 
 	tmp_pfd = NULL;
 	n = 0;
 
-	while(1){
+	while (1) {
 		n = os_create_pollfd(fd, events, tmp_pfd, n);
 		if (n == 0)
 			break;
@@ -198,10 +200,8 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
 		 * then we free the buffer tmp_fds and try again.
 		 */
 		irq_unlock(flags);
-		if (tmp_pfd != NULL) {
-			kfree(tmp_pfd);
-			tmp_pfd = NULL;
-		}
+		kfree(tmp_pfd);
+		tmp_pfd = NULL;
 
 		tmp_pfd = um_kmalloc(n);
 		if (tmp_pfd == NULL)
@@ -249,7 +249,7 @@ static int same_irq_and_dev(struct irq_fd *irq, void *d)
 {
 	struct irq_and_dev *data = d;
 
-	return((irq->irq == data->irq) && (irq->id == data->dev));
+	return ((irq->irq == data->irq) && (irq->id == data->dev));
 }
 
 void free_irq_by_irq_and_dev(unsigned int irq, void *dev)
@@ -262,7 +262,7 @@ void free_irq_by_irq_and_dev(unsigned int irq, void *dev)
 
 static int same_fd(struct irq_fd *irq, void *fd)
 {
-	return(irq->fd == *((int *) fd));
+	return (irq->fd == *((int *)fd));
 }
 
 void free_irq_by_fd(int fd)
@@ -276,16 +276,17 @@ static struct irq_fd *find_irq_by_fd(int fd, int irqnum, int *index_out)
 	int i = 0;
 	int fdi;
 
-	for(irq=active_fds; irq != NULL; irq = irq->next){
-		if((irq->fd == fd) && (irq->irq == irqnum)) break;
+	for (irq = active_fds; irq != NULL; irq = irq->next) {
+		if ((irq->fd == fd) && (irq->irq == irqnum))
+			break;
 		i++;
 	}
-	if(irq == NULL){
+	if (irq == NULL) {
 		printk("find_irq_by_fd doesn't have descriptor %d\n", fd);
 		goto out;
 	}
 	fdi = os_get_pollfd(i);
-	if((fdi != -1) && (fdi != fd)){
+	if ((fdi != -1) && (fdi != fd)) {
 		printk("find_irq_by_fd - mismatch between active_fds and "
 		       "pollfds, fd %d vs %d, need %d\n", irq->fd,
 		       fdi, fd);
@@ -294,7 +295,7 @@ static struct irq_fd *find_irq_by_fd(int fd, int irqnum, int *index_out)
 	}
 	*index_out = i;
  out:
-	return(irq);
+	return irq;
 }
 
 void reactivate_fd(int fd, int irqnum)
@@ -305,7 +306,7 @@ void reactivate_fd(int fd, int irqnum)
 
 	flags = irq_lock();
 	irq = find_irq_by_fd(fd, irqnum, &i);
-	if(irq == NULL){
+	if (irq == NULL) {
 		irq_unlock(flags);
 		return;
 	}
@@ -326,7 +327,7 @@ void deactivate_fd(int fd, int irqnum)
 
 	flags = irq_lock();
 	irq = find_irq_by_fd(fd, irqnum, &i);
-	if(irq == NULL)
+	if (irq == NULL)
 		goto out;
 	os_set_pollfd(i, -1);
  out:
@@ -338,15 +339,15 @@ int deactivate_all_fds(void)
 	struct irq_fd *irq;
 	int err;
 
-	for(irq=active_fds;irq != NULL;irq = irq->next){
+	for (irq = active_fds; irq != NULL; irq = irq->next) {
 		err = os_clear_fd_async(irq->fd);
-		if(err)
-			return(err);
+		if (err)
+			return err;
 	}
 	/* If there is a signal already queued, after unblocking ignore it */
 	os_set_ioignore();
 
-	return(0);
+	return 0;
 }
 
 void forward_interrupts(int pid)
@@ -356,9 +357,9 @@ void forward_interrupts(int pid)
 	int err;
 
 	flags = irq_lock();
-	for(irq=active_fds;irq != NULL;irq = irq->next){
+	for (irq = active_fds; irq != NULL; irq = irq->next) {
 		err = os_set_owner(irq->fd, pid);
-		if(err < 0){
+		if (err < 0) {
 			/* XXX Just remove the irq rather than
 			 * print out an infinite stream of these
 			 */
@@ -379,7 +380,7 @@ void forward_interrupts(int pid)
 unsigned int do_IRQ(int irq, union uml_pt_regs *regs)
 {
        irq_enter();
-       __do_IRQ(irq, (struct pt_regs *) regs);
+       __do_IRQ(irq, (struct pt_regs *)regs);
        irq_exit();
        return 1;
 }
@@ -392,12 +393,12 @@ int um_request_irq(unsigned int irq, int fd, int type,
 	int err;
 
 	err = request_irq(irq, handler, irqflags, devname, dev_id);
-	if(err)
-		return(err);
+	if (err)
+		return err;
 
-	if(fd != -1)
+	if (fd != -1)
 		err = activate_fd(irq, fd, type, dev_id);
-	return(err);
+	return err;
 }
 EXPORT_SYMBOL(um_request_irq);
 EXPORT_SYMBOL(reactivate_fd);
@@ -409,7 +410,7 @@ unsigned long irq_lock(void)
 	unsigned long flags;
 
 	spin_lock_irqsave(&irq_spinlock, flags);
-	return(flags);
+	return flags;
 }
 
 void irq_unlock(unsigned long flags)
@@ -452,7 +453,7 @@ void __init init_IRQ(void)
 	irq_desc[TIMER_IRQ].depth = 1;
 	irq_desc[TIMER_IRQ].handler = &SIGVTALRM_irq_type;
 	enable_irq(TIMER_IRQ);
-	for(i=1;i<NR_IRQS;i++){
+	for (i = 1; i < NR_IRQS; i++) {
 		irq_desc[i].status = IRQ_DISABLED;
 		irq_desc[i].action = NULL;
 		irq_desc[i].depth = 1;
@@ -467,7 +468,7 @@ int init_aio_irq(int irq, char *name, irqreturn_t (*handler)(int, void *,
 	int fds[2], err;
 
 	err = os_pipe(fds, 1, 1);
-	if(err){
+	if (err) {
 		printk("init_aio_irq - os_pipe failed, err = %d\n", -err);
 		goto out;
 	}
@@ -475,7 +476,7 @@ int init_aio_irq(int irq, char *name, irqreturn_t (*handler)(int, void *,
 	err = um_request_irq(irq, fds[0], IRQ_READ, handler,
 			     SA_INTERRUPT | SA_SAMPLE_RANDOM, name,
 			     (void *) (long) fds[0]);
-	if(err){
+	if (err) {
 		printk("init_aio_irq - : um_request_irq failed, err = %d\n",
 		       err);
 		goto out_close;
@@ -488,5 +489,5 @@ int init_aio_irq(int irq, char *name, irqreturn_t (*handler)(int, void *,
 	os_close_file(fds[0]);
 	os_close_file(fds[1]);
  out:
-	return(err);
+	return err;
 }
diff --git a/arch/um/kernel/physmem.c b/arch/um/kernel/physmem.c
index 0500800df1c..fc0f0b085ca 100644
--- a/arch/um/kernel/physmem.c
+++ b/arch/um/kernel/physmem.c
@@ -407,6 +407,8 @@ unsigned long find_iomem(char *driver, unsigned long *len_out)
 			*len_out = region->size;
 			return(region->virt);
 		}
+
+		region = region->next;
 	}
 
 	return(0);
diff --git a/arch/um/kernel/ptrace.c b/arch/um/kernel/ptrace.c
index 60d2eda995c..9a77fb3c269 100644
--- a/arch/um/kernel/ptrace.c
+++ b/arch/um/kernel/ptrace.c
@@ -275,15 +275,13 @@ void syscall_trace(union uml_pt_regs *regs, int entryexit)
 
 	if (unlikely(current->audit_context)) {
 		if (!entryexit)
-			audit_syscall_entry(current,
-                                            HOST_AUDIT_ARCH,
+			audit_syscall_entry(HOST_AUDIT_ARCH,
 					    UPT_SYSCALL_NR(regs),
 					    UPT_SYSCALL_ARG1(regs),
 					    UPT_SYSCALL_ARG2(regs),
 					    UPT_SYSCALL_ARG3(regs),
 					    UPT_SYSCALL_ARG4(regs));
-		else audit_syscall_exit(current,
-                                        AUDITSC_RESULT(UPT_SYSCALL_RET(regs)),
+		else audit_syscall_exit(AUDITSC_RESULT(UPT_SYSCALL_RET(regs)),
                                         UPT_SYSCALL_RET(regs));
 	}
 
diff --git a/arch/um/kernel/skas/Makefile b/arch/um/kernel/skas/Makefile
index 57181a920d4..ea3a8e409a6 100644
--- a/arch/um/kernel/skas/Makefile
+++ b/arch/um/kernel/skas/Makefile
@@ -6,9 +6,11 @@
 obj-y := clone.o exec_kern.o mem.o mmu.o process_kern.o \
 	syscall.o tlb.o uaccess.o
 
-USER_OBJS := clone.o
+# clone.o is in the stub, so it can't be built with profiling
+# GCC hardened also auto-enables -fpic, but we need %ebx so it can't work ->
+# disable it
 
-include arch/um/scripts/Makefile.rules
+CFLAGS_clone.o := $(CFLAGS_NO_HARDENING)
+UNPROFILE_OBJS := clone.o
 
-# clone.o is in the stub, so it can't be built with profiling
-$(obj)/clone.o : c_flags = -Wp,-MD,$(depfile) $(call unprofile,$(USER_CFLAGS))
+include arch/um/scripts/Makefile.rules
diff --git a/arch/um/os-Linux/file.c b/arch/um/os-Linux/file.c
index 3bd10deea28..09251338d99 100644
--- a/arch/um/os-Linux/file.c
+++ b/arch/um/os-Linux/file.c
@@ -171,7 +171,7 @@ int os_sigio_async(int master, int slave)
 
 	flags = fcntl(master, F_GETFL);
 	if(flags < 0)
-		return errno;
+		return -errno;
 
 	if((fcntl(master, F_SETFL, flags | O_NONBLOCK | O_ASYNC) < 0) ||
 	   (fcntl(master, F_SETOWN, os_getpid()) < 0))
diff --git a/arch/um/os-Linux/irq.c b/arch/um/os-Linux/irq.c
index e599be423da..3788d4568d3 100644
--- a/arch/um/os-Linux/irq.c
+++ b/arch/um/os-Linux/irq.c
@@ -29,21 +29,21 @@ int os_waiting_for_events(struct irq_fd *active_fds)
 	int i, n, err;
 
 	n = poll(pollfds, pollfds_num, 0);
-	if(n < 0){
+	if (n < 0) {
 		err = -errno;
-		if(errno != EINTR)
+		if (errno != EINTR)
 			printk("sigio_handler: os_waiting_for_events:"
 			       " poll returned %d, errno = %d\n", n, errno);
 		return err;
 	}
 
-	if(n == 0)
+	if (n == 0)
 		return 0;
 
 	irq_fd = active_fds;
 
-	for(i = 0; i < pollfds_num; i++){
-		if(pollfds[i].revents != 0){
+	for (i = 0; i < pollfds_num; i++) {
+		if (pollfds[i].revents != 0) {
 			irq_fd->current_events = pollfds[i].revents;
 			pollfds[i].fd = -1;
 		}
@@ -54,7 +54,7 @@ int os_waiting_for_events(struct irq_fd *active_fds)
 
 int os_isatty(int fd)
 {
-	return(isatty(fd));
+	return isatty(fd);
 }
 
 int os_create_pollfd(int fd, int events, void *tmp_pfd, int size_tmpfds)
@@ -65,7 +65,7 @@ int os_create_pollfd(int fd, int events, void *tmp_pfd, int size_tmpfds)
 			return((pollfds_size + 1) * sizeof(pollfds[0]));
 		}
 
-		if(pollfds != NULL){
+		if (pollfds != NULL) {
 			memcpy(tmp_pfd, pollfds,
 			       sizeof(pollfds[0]) * pollfds_size);
 			/* remove old pollfds */
@@ -73,18 +73,15 @@ int os_create_pollfd(int fd, int events, void *tmp_pfd, int size_tmpfds)
 		}
 		pollfds = tmp_pfd;
 		pollfds_size++;
-	} else {
-		/* remove not used tmp_pfd */
-		if (tmp_pfd != NULL)
-			kfree(tmp_pfd);
-	}
+	} else
+		kfree(tmp_pfd);	/* remove not used tmp_pfd */
 
-	pollfds[pollfds_num] = ((struct pollfd) { .fd 	= fd,
-						  .events 	= events,
-						  .revents 	= 0 });
+	pollfds[pollfds_num] = ((struct pollfd) { .fd		= fd,
+						  .events	= events,
+						  .revents	= 0 });
 	pollfds_num++;
 
-	return(0);
+	return 0;
 }