7 files changed, 74 insertions, 23 deletions

diff --git a/arch/s390/defconfig b/arch/s390/defconfig
index c5cdb975d590..9b0bc2c9fba0 100644
--- a/arch/s390/defconfig
+++ b/arch/s390/defconfig
@@ -1,7 +1,7 @@
 #
 # Automatically generated make config: don't edit
-# Linux kernel version: 2.6.26-rc4
-# Fri May 30 09:49:33 2008
+# Linux kernel version: 2.6.27-rc4
+# Thu Aug 21 19:43:29 2008
 #
 CONFIG_SCHED_MC=y
 CONFIG_MMU=y
@@ -68,7 +68,6 @@ CONFIG_INITRAMFS_SOURCE=""
 CONFIG_SYSCTL=y
 # CONFIG_EMBEDDED is not set
 CONFIG_SYSCTL_SYSCALL=y
-CONFIG_SYSCTL_SYSCALL_CHECK=y
 CONFIG_KALLSYMS=y
 # CONFIG_KALLSYMS_ALL is not set
 # CONFIG_KALLSYMS_EXTRA_PASS is not set
@@ -93,11 +92,17 @@ CONFIG_SLAB=y
 # CONFIG_MARKERS is not set
 CONFIG_HAVE_OPROFILE=y
 CONFIG_KPROBES=y
+# CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS is not set
 CONFIG_KRETPROBES=y
+# CONFIG_HAVE_IOREMAP_PROT is not set
 CONFIG_HAVE_KPROBES=y
 CONFIG_HAVE_KRETPROBES=y
+# CONFIG_HAVE_ARCH_TRACEHOOK is not set
 # CONFIG_HAVE_DMA_ATTRS is not set
+# CONFIG_USE_GENERIC_SMP_HELPERS is not set
+# CONFIG_HAVE_CLK is not set
 CONFIG_PROC_PAGE_MONITOR=y
+# CONFIG_HAVE_GENERIC_DMA_COHERENT is not set
 CONFIG_SLABINFO=y
 CONFIG_RT_MUTEXES=y
 # CONFIG_TINY_SHMEM is not set
@@ -113,6 +118,7 @@ CONFIG_STOP_MACHINE=y
 CONFIG_BLOCK=y
 # CONFIG_BLK_DEV_IO_TRACE is not set
 CONFIG_BLK_DEV_BSG=y
+# CONFIG_BLK_DEV_INTEGRITY is not set
 CONFIG_BLOCK_COMPAT=y
 
 #
@@ -175,6 +181,8 @@ CONFIG_PREEMPT=y
 CONFIG_ARCH_SPARSEMEM_ENABLE=y
 CONFIG_ARCH_SPARSEMEM_DEFAULT=y
 CONFIG_ARCH_SELECT_MEMORY_MODEL=y
+CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
+CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE=y
 CONFIG_SELECT_MEMORY_MODEL=y
 # CONFIG_FLATMEM_MANUAL is not set
 # CONFIG_DISCONTIGMEM_MANUAL is not set
@@ -185,8 +193,12 @@ CONFIG_HAVE_MEMORY_PRESENT=y
 CONFIG_SPARSEMEM_EXTREME=y
 CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y
 CONFIG_SPARSEMEM_VMEMMAP=y
+CONFIG_MEMORY_HOTPLUG=y
+CONFIG_MEMORY_HOTPLUG_SPARSE=y
+CONFIG_MEMORY_HOTREMOVE=y
 CONFIG_PAGEFLAGS_EXTENDED=y
 CONFIG_SPLIT_PTLOCK_CPUS=4
+CONFIG_MIGRATION=y
 CONFIG_RESOURCES_64BIT=y
 CONFIG_ZONE_DMA_FLAG=1
 CONFIG_BOUNCE=y
@@ -198,6 +210,7 @@ CONFIG_VIRT_TO_BUS=y
 CONFIG_MACHCHK_WARNING=y
 CONFIG_QDIO=y
 # CONFIG_QDIO_DEBUG is not set
+CONFIG_CHSC_SCH=m
 
 #
 # Misc
@@ -206,6 +219,7 @@ CONFIG_IPL=y
 # CONFIG_IPL_TAPE is not set
 CONFIG_IPL_VM=y
 CONFIG_BINFMT_ELF=y
+CONFIG_COMPAT_BINFMT_ELF=y
 CONFIG_BINFMT_MISC=m
 CONFIG_FORCE_MAX_ZONEORDER=9
 # CONFIG_PROCESS_DEBUG is not set
@@ -226,10 +240,6 @@ CONFIG_S390_HYPFS_FS=y
 CONFIG_KEXEC=y
 # CONFIG_ZFCPDUMP is not set
 CONFIG_S390_GUEST=y
-
-#
-# Networking
-#
 CONFIG_NET=y
 
 #
@@ -364,7 +374,6 @@ CONFIG_NET_SCH_CBQ=m
 # CONFIG_NET_SCH_HTB is not set
 # CONFIG_NET_SCH_HFSC is not set
 CONFIG_NET_SCH_PRIO=m
-CONFIG_NET_SCH_RR=m
 CONFIG_NET_SCH_RED=m
 CONFIG_NET_SCH_SFQ=m
 CONFIG_NET_SCH_TEQL=m
@@ -430,7 +439,9 @@ CONFIG_CCW=y
 CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
 CONFIG_STANDALONE=y
 CONFIG_PREVENT_FIRMWARE_BUILD=y
-# CONFIG_FW_LOADER is not set
+CONFIG_FW_LOADER=y
+# CONFIG_FIRMWARE_IN_KERNEL is not set
+CONFIG_EXTRA_FIRMWARE=""
 # CONFIG_DEBUG_DRIVER is not set
 # CONFIG_DEBUG_DEVRES is not set
 CONFIG_SYS_HYPERVISOR=y
@@ -507,6 +518,11 @@ CONFIG_SCSI_LOWLEVEL=y
 # CONFIG_ISCSI_TCP is not set
 # CONFIG_SCSI_DEBUG is not set
 CONFIG_ZFCP=y
+CONFIG_SCSI_DH=m
+CONFIG_SCSI_DH_RDAC=m
+CONFIG_SCSI_DH_HP_SW=m
+CONFIG_SCSI_DH_EMC=m
+CONFIG_SCSI_DH_ALUA=m
 CONFIG_MD=y
 CONFIG_BLK_DEV_MD=y
 CONFIG_MD_LINEAR=m
@@ -522,14 +538,10 @@ CONFIG_DM_CRYPT=y
 CONFIG_DM_SNAPSHOT=y
 CONFIG_DM_MIRROR=y
 CONFIG_DM_ZERO=y
-CONFIG_DM_MULTIPATH=y
-# CONFIG_DM_MULTIPATH_EMC is not set
-# CONFIG_DM_MULTIPATH_RDAC is not set
-# CONFIG_DM_MULTIPATH_HP is not set
+CONFIG_DM_MULTIPATH=m
 # CONFIG_DM_DELAY is not set
 # CONFIG_DM_UEVENT is not set
 CONFIG_NETDEVICES=y
-# CONFIG_NETDEVICES_MULTIQUEUE is not set
 # CONFIG_IFB is not set
 CONFIG_DUMMY=m
 CONFIG_BONDING=m
@@ -544,7 +556,6 @@ CONFIG_NET_ETHERNET=y
 # CONFIG_IBM_NEW_EMAC_TAH is not set
 # CONFIG_IBM_NEW_EMAC_EMAC4 is not set
 CONFIG_NETDEV_1000=y
-# CONFIG_E1000E_ENABLED is not set
 CONFIG_NETDEV_10000=y
 # CONFIG_TR is not set
 # CONFIG_WAN is not set
@@ -576,7 +587,10 @@ CONFIG_DEVKMEM=y
 CONFIG_UNIX98_PTYS=y
 CONFIG_LEGACY_PTYS=y
 CONFIG_LEGACY_PTY_COUNT=256
+CONFIG_HVC_DRIVER=y
+CONFIG_VIRTIO_CONSOLE=y
 CONFIG_HW_RANDOM=m
+CONFIG_HW_RANDOM_VIRTIO=m
 # CONFIG_R3964 is not set
 CONFIG_RAW_DRIVER=m
 CONFIG_MAX_RAW_DEVS=256
@@ -616,6 +630,7 @@ CONFIG_MONWRITER=m
 CONFIG_S390_VMUR=m
 # CONFIG_POWER_SUPPLY is not set
 # CONFIG_THERMAL is not set
+# CONFIG_THERMAL_HWMON is not set
 # CONFIG_WATCHDOG is not set
 
 #
@@ -693,6 +708,7 @@ CONFIG_CONFIGFS_FS=m
 # CONFIG_CRAMFS is not set
 # CONFIG_VXFS_FS is not set
 # CONFIG_MINIX_FS is not set
+# CONFIG_OMFS_FS is not set
 # CONFIG_HPFS_FS is not set
 # CONFIG_QNX4FS_FS is not set
 # CONFIG_ROMFS_FS is not set
@@ -712,7 +728,6 @@ CONFIG_LOCKD_V4=y
 CONFIG_EXPORTFS=y
 CONFIG_NFS_COMMON=y
 CONFIG_SUNRPC=y
-# CONFIG_SUNRPC_BIND34 is not set
 # CONFIG_RPCSEC_GSS_KRB5 is not set
 # CONFIG_RPCSEC_GSS_SPKM3 is not set
 # CONFIG_SMB_FS is not set
@@ -780,6 +795,7 @@ CONFIG_DEBUG_BUGVERBOSE=y
 # CONFIG_DEBUG_INFO is not set
 # CONFIG_DEBUG_VM is not set
 # CONFIG_DEBUG_WRITECOUNT is not set
+CONFIG_DEBUG_MEMORY_INIT=y
 # CONFIG_DEBUG_LIST is not set
 # CONFIG_DEBUG_SG is not set
 # CONFIG_FRAME_POINTER is not set
@@ -789,6 +805,7 @@ CONFIG_DEBUG_BUGVERBOSE=y
 # CONFIG_LKDTM is not set
 # CONFIG_FAULT_INJECTION is not set
 # CONFIG_LATENCYTOP is not set
+CONFIG_SYSCTL_SYSCALL_CHECK=y
 CONFIG_SAMPLES=y
 # CONFIG_SAMPLE_KOBJECT is not set
 # CONFIG_SAMPLE_KPROBES is not set
@@ -847,6 +864,10 @@ CONFIG_CRYPTO_HMAC=m
 # CONFIG_CRYPTO_MD4 is not set
 CONFIG_CRYPTO_MD5=m
 # CONFIG_CRYPTO_MICHAEL_MIC is not set
+CONFIG_CRYPTO_RMD128=m
+CONFIG_CRYPTO_RMD160=m
+CONFIG_CRYPTO_RMD256=m
+CONFIG_CRYPTO_RMD320=m
 CONFIG_CRYPTO_SHA1=m
 # CONFIG_CRYPTO_SHA256 is not set
 # CONFIG_CRYPTO_SHA512 is not set
@@ -895,6 +916,7 @@ CONFIG_BITREVERSE=m
 # CONFIG_GENERIC_FIND_NEXT_BIT is not set
 # CONFIG_CRC_CCITT is not set
 # CONFIG_CRC16 is not set
+CONFIG_CRC_T10DIF=y
 # CONFIG_CRC_ITU_T is not set
 CONFIG_CRC32=m
 CONFIG_CRC7=m
diff --git a/arch/s390/include/asm/bitops.h b/arch/s390/include/asm/bitops.h
index b4eb24ab5af9..8e9243ae0c19 100644
--- a/arch/s390/include/asm/bitops.h
+++ b/arch/s390/include/asm/bitops.h
@@ -709,7 +709,7 @@ static inline int find_next_zero_bit (const unsigned long * addr,
                  * __ffz_word returns __BITOPS_WORDSIZE
                  * if no zero bit is present in the word.
                  */
-                set = __ffz_word(0, *p >> bit) + bit;
+                set = __ffz_word(bit, *p >> bit);
                 if (set >= size)
                         return size + offset;
                 if (set < __BITOPS_WORDSIZE)
@@ -824,7 +824,7 @@ static inline int ext2_find_next_zero_bit(void *vaddr, unsigned long size,
                  * s390 version of ffz returns __BITOPS_WORDSIZE
                  * if no zero bit is present in the word.
                  */
-                set = ffz(__load_ulong_le(p, 0) >> bit) + bit;
+                set = __ffz_word(bit, __load_ulong_le(p, 0) >> bit);
                 if (set >= size)
                         return size + offset;
                 if (set < __BITOPS_WORDSIZE)
@@ -865,7 +865,7 @@ static inline int ext2_find_next_bit(void *vaddr, unsigned long size,
                  * s390 version of ffz returns __BITOPS_WORDSIZE
                  * if no zero bit is present in the word.
                  */
-                set = ffs(__load_ulong_le(p, 0) >> bit) + bit;
+                set = __ffs_word(0, __load_ulong_le(p, 0) & (~0UL << bit));
                 if (set >= size)
                         return size + offset;
                 if (set < __BITOPS_WORDSIZE)
diff --git a/arch/s390/kernel/compat_ptrace.h b/arch/s390/kernel/compat_ptrace.h
index cde81fa64f89..a2be3a978d5c 100644
--- a/arch/s390/kernel/compat_ptrace.h
+++ b/arch/s390/kernel/compat_ptrace.h
@@ -42,6 +42,7 @@ struct user_regs_struct32
         u32 gprs[NUM_GPRS];
         u32 acrs[NUM_ACRS];
         u32 orig_gpr2;
+        /* nb: there's a 4-byte hole here */
         s390_fp_regs fp_regs;
         /*
          * These per registers are in here so that gdb can modify them
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index 9839767d0842..3e2c05cb6a87 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -75,7 +75,9 @@ unsigned long thread_saved_pc(struct task_struct *tsk)
         return sf->gprs[8];
 }
 
-DEFINE_PER_CPU(struct s390_idle_data, s390_idle);
+DEFINE_PER_CPU(struct s390_idle_data, s390_idle) = {
+        .lock = __SPIN_LOCK_UNLOCKED(s390_idle.lock)
+};
 
 static int s390_idle_enter(void)
 {
diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index 2815bfe348a6..c8b08289eb87 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -170,6 +170,13 @@ static unsigned long __peek_user(struct task_struct *child, addr_t addr)
                  */
                 tmp = (addr_t) task_pt_regs(child)->orig_gpr2;
 
+        } else if (addr < (addr_t) &dummy->regs.fp_regs) {
+                /*
+                 * prevent reads of padding hole between
+                 * orig_gpr2 and fp_regs on s390.
+                 */
+                tmp = 0;
+
         } else if (addr < (addr_t) (&dummy->regs.fp_regs + 1)) {
                 /* 
                  * floating point regs. are stored in the thread structure
@@ -270,6 +277,13 @@ static int __poke_user(struct task_struct *child, addr_t addr, addr_t data)
                  */
                 task_pt_regs(child)->orig_gpr2 = data;
 
+        } else if (addr < (addr_t) &dummy->regs.fp_regs) {
+                /*
+                 * prevent writes of padding hole between
+                 * orig_gpr2 and fp_regs on s390.
+                 */
+                return 0;
+
         } else if (addr < (addr_t) (&dummy->regs.fp_regs + 1)) {
                 /*
                  * floating point regs. are stored in the thread structure
@@ -428,6 +442,13 @@ static u32 __peek_user_compat(struct task_struct *child, addr_t addr)
                  */
                 tmp = *(__u32*)((addr_t) &task_pt_regs(child)->orig_gpr2 + 4);
 
+        } else if (addr < (addr_t) &dummy32->regs.fp_regs) {
+                /*
+                 * prevent reads of padding hole between
+                 * orig_gpr2 and fp_regs on s390.
+                 */
+                tmp = 0;
+
         } else if (addr < (addr_t) (&dummy32->regs.fp_regs + 1)) {
                 /*
                  * floating point regs. are stored in the thread structure 
@@ -514,6 +535,13 @@ static int __poke_user_compat(struct task_struct *child,
                  */
                 *(__u32*)((addr_t) &task_pt_regs(child)->orig_gpr2 + 4) = tmp;
 
+        } else if (addr < (addr_t) &dummy32->regs.fp_regs) {
+                /*
+                 * prevent writess of padding hole between
+                 * orig_gpr2 and fp_regs on s390.
+                 */
+                return 0;
+
         } else if (addr < (addr_t) (&dummy32->regs.fp_regs + 1)) {
                 /*
                  * floating point regs. are stored in the thread structure 
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index b795b3e24afd..00b9b4dec5eb 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -610,7 +610,6 @@ static void __init smp_create_idle(unsigned int cpu)
         if (IS_ERR(p))
                 panic("failed fork for CPU %u: %li", cpu, PTR_ERR(p));
         current_set[cpu] = p;
-        spin_lock_init(&(&per_cpu(s390_idle, cpu))->lock);
 }
 
 static int __cpuinit smp_alloc_lowcore(int cpu)
@@ -845,7 +844,6 @@ void __init smp_prepare_boot_cpu(void)
         current_set[0] = current;
         smp_cpu_state[0] = CPU_STATE_CONFIGURED;
         smp_cpu_polarization[0] = POLARIZATION_UNKNWN;
-        spin_lock_init(&(&__get_cpu_var(s390_idle))->lock);
 }
 
 void __init smp_cpus_done(unsigned int max_cpus)
diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S
index 76c1e60c92f3..607bd67a18ce 100644
--- a/arch/s390/kernel/vmlinux.lds.S
+++ b/arch/s390/kernel/vmlinux.lds.S
@@ -55,7 +55,7 @@ SECTIONS
                 __start___ex_table = .;
                 *(__ex_table)
                 __stop___ex_table = .;
-        }
+        } :data
 
         .data : {               /* Data */
                 DATA_DATA