9 files changed, 83 insertions, 37 deletions

diff --git a/arch/s390/kernel/compat_linux.c b/arch/s390/kernel/compat_linux.c
index 614056222875..18610cea03a2 100644
--- a/arch/s390/kernel/compat_linux.c
+++ b/arch/s390/kernel/compat_linux.c
@@ -58,6 +58,7 @@
 #include <linux/compat.h>
 #include <linux/vfs.h>
 #include <linux/ptrace.h>
+#include <linux/fadvise.h>
 
 #include <asm/types.h>
 #include <asm/ipc.h>
@@ -1043,3 +1044,40 @@ sys32_timer_create(clockid_t which_clock, struct compat_sigevent *se32,
 
         return ret;
 }
+
+/*
+ * 31 bit emulation wrapper functions for sys_fadvise64/fadvise64_64.
+ * These need to rewrite the advise values for POSIX_FADV_{DONTNEED,NOREUSE}
+ * because the 31 bit values differ from the 64 bit values.
+ */
+
+asmlinkage long
+sys32_fadvise64(int fd, loff_t offset, size_t len, int advise)
+{
+        if (advise == 4)
+                advise = POSIX_FADV_DONTNEED;
+        else if (advise == 5)
+                advise = POSIX_FADV_NOREUSE;
+        return sys_fadvise64(fd, offset, len, advise);
+}
+
+struct fadvise64_64_args {
+        int fd;
+        long long offset;
+        long long len;
+        int advice;
+};
+
+asmlinkage long
+sys32_fadvise64_64(struct fadvise64_64_args __user *args)
+{
+        struct fadvise64_64_args a;
+
+        if ( copy_from_user(&a, args, sizeof(a)) )
+                return -EFAULT;
+        if (a.advice == 4)
+                a.advice = POSIX_FADV_DONTNEED;
+        else if (a.advice == 5)
+                a.advice = POSIX_FADV_NOREUSE;
+        return sys_fadvise64_64(a.fd, a.offset, a.len, a.advice);
+}
diff --git a/arch/s390/kernel/compat_wrapper.S b/arch/s390/kernel/compat_wrapper.S
index bf529739c8ab..799a98eac92d 100644
--- a/arch/s390/kernel/compat_wrapper.S
+++ b/arch/s390/kernel/compat_wrapper.S
@@ -1251,12 +1251,12 @@ sys32_fadvise64_wrapper:
         or      %r3,%r4                 # get low word of 64bit loff_t
         llgfr   %r4,%r5                 # size_t (unsigned long)
         lgfr    %r5,%r6                 # int
-        jg      sys_fadvise64
+        jg      sys32_fadvise64
 
         .globl  sys32_fadvise64_64_wrapper
 sys32_fadvise64_64_wrapper:
         llgtr   %r2,%r2                 # struct fadvise64_64_args *
-        jg      s390_fadvise64_64
+        jg      sys32_fadvise64_64
 
         .globl  sys32_clock_settime_wrapper
 sys32_clock_settime_wrapper:
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 5b262b5d869f..1a271b16cb5c 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -690,9 +690,9 @@ mcck_int_handler:
         bo      BASED(0f)
         spt     __LC_LAST_UPDATE_TIMER  # revalidate cpu timer
 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
-        mvc     __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
-        mvc     __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
-        mvc     __LC_LAST_UPDATE_TIMER(8),__LC_EXIT_TIMER
+        mvc     __LC_ASYNC_ENTER_TIMER(8),__LC_LAST_UPDATE_TIMER
+        mvc     __LC_SYNC_ENTER_TIMER(8),__LC_LAST_UPDATE_TIMER
+        mvc     __LC_EXIT_TIMER(8),__LC_LAST_UPDATE_TIMER
 0:      tm      __LC_MCCK_CODE+2,0x08   # mwp of old psw valid?
         bno     BASED(mcck_no_vtime)    # no -> skip cleanup critical
         tm      __LC_MCK_OLD_PSW+1,0x01 # interrupting from user ?
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
index 57ca75d0ad7f..d9f22915008c 100644
--- a/arch/s390/kernel/entry64.S
+++ b/arch/s390/kernel/entry64.S
@@ -727,9 +727,9 @@ mcck_int_handler:
         jo      0f
         spt     __LC_LAST_UPDATE_TIMER
 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
-        mvc     __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
-        mvc     __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
-        mvc     __LC_LAST_UPDATE_TIMER(8),__LC_EXIT_TIMER
+        mvc     __LC_ASYNC_ENTER_TIMER(8),__LC_LAST_UPDATE_TIMER
+        mvc     __LC_SYNC_ENTER_TIMER(8),__LC_LAST_UPDATE_TIMER
+        mvc     __LC_EXIT_TIMER(8),__LC_LAST_UPDATE_TIMER
 0:      tm      __LC_MCCK_CODE+2,0x08   # mwp of old psw valid?
         jno     mcck_no_vtime           # no -> no timer update
         tm      __LC_MCK_OLD_PSW+1,0x01 # interrupting from user ?
diff --git a/arch/s390/kernel/head.S b/arch/s390/kernel/head.S
index fc8bf5e285f6..2710e66fefba 100644
--- a/arch/s390/kernel/head.S
+++ b/arch/s390/kernel/head.S
@@ -346,6 +346,13 @@ iplstart:
         la    %r2,.Lreset              
         lhi   %r3,26
         diag  %r2,%r3,8
+        la    %r5,.Lirb
+        stsch 0(%r5)                           # check if irq is pending
+        tm    30(%r5),0x0f                     # by verifying if any of the
+        bnz   .Lwaitforirq                     # activity or status control
+        tm    31(%r5),0xff                     # bits is set in the schib
+        bz    .Lnoreset
+.Lwaitforirq:
         mvc   0x78(8),.Lrdrnewpsw              # set up IO interrupt psw
 .Lwaitrdrirq:
         lpsw  .Lrdrwaitpsw
@@ -535,8 +542,13 @@ startup:basr  %r13,0                     # get base
         lhi   %r1,0
         icm   %r1,3,.Lscpincr1-PARMAREA(%r4) # use this one if != 0
         jnz   .Lscnd
-        l     %r1,.Lscpincr2-PARMAREA+4(%r4) # otherwise use this one
+        lhi   %r1,0x800                 # otherwise report 2GB
 .Lscnd:
+        lhi   %r3,0x800                 # limit reported memory size to 2GB
+        cr    %r1,%r3
+        jl    .Lno2gb
+        lr    %r1,%r3
+.Lno2gb:
         xr    %r3,%r3                   # same logic
         ic    %r3,.Lscpa1-PARMAREA(%r4)
         chi   %r3,0x00
@@ -765,7 +777,7 @@ _stext:	basr  %r13,0                    # get base
 
 # check control registers
         stctl  %c0,%c15,0(%r15)
-        oi     2(%r15),0x20             # enable sigp external interrupts
+        oi     2(%r15),0x40             # enable sigp emergency signal
         oi     0(%r15),0x10             # switch on low address protection
         lctl   %c0,%c15,0(%r15)
 
diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S
index f525c0c21250..9a8263a153cb 100644
--- a/arch/s390/kernel/head64.S
+++ b/arch/s390/kernel/head64.S
@@ -345,6 +345,13 @@ iplstart:
         la    %r2,.Lreset              
         lhi   %r3,26
         diag  %r2,%r3,8
+        la    %r5,.Lirb
+        stsch 0(%r5)                           # check if irq is pending
+        tm    30(%r5),0x0f                     # by verifying if any of the
+        bnz   .Lwaitforirq                     # activity or status control
+        tm    31(%r5),0xff                     # bits is set in the schib
+        bz    .Lnoreset
+.Lwaitforirq:
         mvc   0x78(8),.Lrdrnewpsw              # set up IO interrupt psw
 .Lwaitrdrirq:
         lpsw  .Lrdrwaitpsw
@@ -658,10 +665,8 @@ startup:basr  %r13,0                     # get base
 #
         la     %r1,0f-.LPG1(%r13)       # set program check address
         stg    %r1,__LC_PGM_NEW_PSW+8
-        mvc    __LC_DIAG44_OPCODE(8),.Lnop-.LPG1(%r13)
         diag   0,0,0x44                 # test diag 0x44
         oi     7(%r12),32               # set diag44 flag
-        mvc    __LC_DIAG44_OPCODE(8),.Ldiag44-.LPG1(%r13)
 0:      
 
 #
@@ -702,7 +707,6 @@ startup:basr  %r13,0                     # get base
 .L4malign:.quad 0xffffffffffc00000
 .Lscan2g:.quad 0x80000000 + 0x20000 - 8 # 2GB + 128K - 8
 .Lnop:  .long  0x07000700
-.Ldiag44:.long 0x83000044
 
         .org PARMAREA-64
 .Lduct: .long 0,0,0,0,0,0,0,0
@@ -765,7 +769,7 @@ _stext:	basr  %r13,0                    # get base
 
 # check control registers
         stctg  %c0,%c15,0(%r15)
-        oi     6(%r15),0x20             # enable sigp external interrupts
+        oi     6(%r15),0x40             # enable sigp emergency signal
         oi     4(%r15),0x10             # switch on low address proctection
         lctlg  %c0,%c15,0(%r15)
 
diff --git a/arch/s390/kernel/s390_ext.c b/arch/s390/kernel/s390_ext.c
index 3bdd38ec71da..207bc511a6e3 100644
--- a/arch/s390/kernel/s390_ext.c
+++ b/arch/s390/kernel/s390_ext.c
@@ -19,7 +19,6 @@
 #include <asm/irq.h>
 
 /*
- * Simple hash strategy: index = code & 0xff;
  * ext_int_hash[index] is the start of the list for all external interrupts
  * that hash to this index. With the current set of external interrupts 
  * (0x1202 external call, 0x1004 cpu timer, 0x2401 hwc console, 0x4000
@@ -27,6 +26,11 @@
  */
 ext_int_info_t *ext_int_hash[256] = { 0, };
 
+static inline int ext_hash(__u16 code)
+{
+        return (code + (code >> 9)) & 0xff;
+}
+
 int register_external_interrupt(__u16 code, ext_int_handler_t handler)
 {
         ext_int_info_t *p;
@@ -37,7 +41,7 @@ int register_external_interrupt(__u16 code, ext_int_handler_t handler)
                 return -ENOMEM;
         p->code = code;
         p->handler = handler;
-        index = code & 0xff;
+        index = ext_hash(code);
         p->next = ext_int_hash[index];
         ext_int_hash[index] = p;
         return 0;
@@ -52,7 +56,7 @@ int register_early_external_interrupt(__u16 code, ext_int_handler_t handler,
                 return -EINVAL;
         p->code = code;
         p->handler = handler;
-        index = code & 0xff;
+        index = ext_hash(code);
         p->next = ext_int_hash[index];
         ext_int_hash[index] = p;
         return 0;
@@ -63,7 +67,7 @@ int unregister_external_interrupt(__u16 code, ext_int_handler_t handler)
         ext_int_info_t *p, *q;
         int index;
 
-        index = code & 0xff;
+        index = ext_hash(code);
         q = NULL;
         p = ext_int_hash[index];
         while (p != NULL) {
@@ -90,7 +94,7 @@ int unregister_early_external_interrupt(__u16 code, ext_int_handler_t handler,
 
         if (p == NULL || p->code != code || p->handler != handler)
                 return -EINVAL;
-        index = code & 0xff;
+        index = ext_hash(code);
         q = ext_int_hash[index];
         if (p != q) {
                 while (q != NULL) {
@@ -120,7 +124,7 @@ void do_extint(struct pt_regs *regs, unsigned short code)
                  */
                 account_ticks(regs);
         kstat_cpu(smp_processor_id()).irqs[EXTERNAL_INTERRUPT]++;
-        index = code & 0xff;
+        index = ext_hash(code);
         for (p = ext_int_hash[index]; p; p = p->next) {
                 if (likely(p->code == code)) {
                         if (likely(p->handler))
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index b6d740ac0e6e..5ba5a5485da9 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -299,24 +299,18 @@ void machine_restart(char *command)
         _machine_restart(command);
 }
 
-EXPORT_SYMBOL(machine_restart);
-
 void machine_halt(void)
 {
         console_unblank();
         _machine_halt();
 }
 
-EXPORT_SYMBOL(machine_halt);
-
 void machine_power_off(void)
 {
         console_unblank();
         _machine_power_off();
 }
 
-EXPORT_SYMBOL(machine_power_off);
-
 static void __init
 add_memory_hole(unsigned long start, unsigned long end)
 {
@@ -437,12 +431,6 @@ setup_lowcore(void)
                 ctl_set_bit(14, 29);
         }
 #endif
-#ifdef CONFIG_ARCH_S390X
-        if (MACHINE_HAS_DIAG44)
-                lc->diag44_opcode = 0x83000044;
-        else
-                lc->diag44_opcode = 0x07000700;
-#endif /* CONFIG_ARCH_S390X */
         set_prefix((u32)(unsigned long) lc);
 }
 
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 642572a8e334..da77f001af8d 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -375,7 +375,7 @@ static void smp_ext_bitcall(int cpu, ec_bit_sig sig)
          * Set signaling bit in lowcore of target cpu and kick it
          */
         set_bit(sig, (unsigned long *) &lowcore_ptr[cpu]->ext_call_fast);
-        while(signal_processor(cpu, sigp_external_call) == sigp_busy)
+        while(signal_processor(cpu, sigp_emergency_signal) == sigp_busy)
                 udelay(10);
 }
 
@@ -394,7 +394,7 @@ static void smp_ext_bitcall_others(ec_bit_sig sig)
                  * Set signaling bit in lowcore of target cpu and kick it
                  */
                 set_bit(sig, (unsigned long *) &lowcore_ptr[cpu]->ext_call_fast);
-                while (signal_processor(cpu, sigp_external_call) == sigp_busy)
+                while (signal_processor(cpu, sigp_emergency_signal) == sigp_busy)
                         udelay(10);
         }
 }
@@ -751,9 +751,9 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
         unsigned int cpu;
         int i;
 
-        /* request the 0x1202 external interrupt */
-        if (register_external_interrupt(0x1202, do_ext_call_interrupt) != 0)
-                panic("Couldn't request external interrupt 0x1202");
+        /* request the 0x1201 emergency signal external interrupt */
+        if (register_external_interrupt(0x1201, do_ext_call_interrupt) != 0)
+                panic("Couldn't request external interrupt 0x1201");
         smp_check_cpus(max_cpus);
         memset(lowcore_ptr,0,sizeof(lowcore_ptr));  
         /*