Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6

* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: (72 commits)
  [S390] 3215/3270 console: remove wrong comment
  [S390] dasd: remove BKL from extended error reporting code
  [S390] vmlogrdr: remove BKL
  [S390] vmur: remove BKL
  [S390] zcrypt: remove BKL
  [S390] 3270: remove BKL
  [S390] vmwatchdog: remove lock_kernel() from open() function
  [S390] monwriter: remove lock_kernel() from open() function
  [S390] monreader: remove lock_kernel() from open() function
  [S390] s390: remove unused nfsd #includes
  [S390] ftrace: build ftrace.o when CONFIG_FTRACE_SYSCALLS is set for s390
  [S390] etr/stp: put correct per cpu variable
  [S390] tty3270: move keyboard compat ioctls
  [S390] sclp: improve servicability setting
  [S390] s390: use change recording override for kernel mapping
  [S390] MAINTAINERS: Add s390 drivers block
  [S390] use generic sockios.h header file
  [S390] use generic termbits.h header file
  [S390] smp: remove unused typedef and defines
  [S390] cmm: free pages on hibernate.
  ...

7 files changed, 31 insertions, 32 deletions

diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile
index c7be8e10b87e..683f6381cc59 100644
--- a/arch/s390/kernel/Makefile
+++ b/arch/s390/kernel/Makefile
@@ -44,6 +44,7 @@ obj-$(CONFIG_KPROBES)		+= kprobes.o
 obj-$(CONFIG_FUNCTION_TRACER)   += $(if $(CONFIG_64BIT),mcount64.o,mcount.o)
 obj-$(CONFIG_DYNAMIC_FTRACE)    += ftrace.o
 obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o
+obj-$(CONFIG_FTRACE_SYSCALLS)  += ftrace.o
 
 # Kexec part
 S390_KEXEC_OBJS := machine_kexec.o crash.o
diff --git a/arch/s390/kernel/compat_linux.c b/arch/s390/kernel/compat_linux.c
index fda1a8123f9b..25c31d681402 100644
--- a/arch/s390/kernel/compat_linux.c
+++ b/arch/s390/kernel/compat_linux.c
@@ -31,14 +31,8 @@
 #include <linux/shm.h>
 #include <linux/slab.h>
 #include <linux/uio.h>
-#include <linux/nfs_fs.h>
 #include <linux/quota.h>
 #include <linux/module.h>
-#include <linux/sunrpc/svc.h>
-#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/cache.h>
-#include <linux/nfsd/xdr.h>
-#include <linux/nfsd/syscall.h>
 #include <linux/poll.h>
 #include <linux/personality.h>
 #include <linux/stat.h>
diff --git a/arch/s390/kernel/compat_linux.h b/arch/s390/kernel/compat_linux.h
index 45e9092b3aad..cb97afc85c94 100644
--- a/arch/s390/kernel/compat_linux.h
+++ b/arch/s390/kernel/compat_linux.h
@@ -4,10 +4,6 @@
 #include <linux/compat.h>
 #include <linux/socket.h>
 #include <linux/syscalls.h>
-#include <linux/nfs_fs.h>
-#include <linux/sunrpc/svc.h>
-#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/export.h>
 
 /* Macro that masks the high order bit of an 32 bit pointer and converts it*/
 /*       to a 64 bit pointer */
diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S
index 6a250808092b..d984a2a380c3 100644
--- a/arch/s390/kernel/head64.S
+++ b/arch/s390/kernel/head64.S
@@ -83,6 +83,8 @@ startup_continue:
         slr     %r0,%r0                 # set cpuid to zero
         sigp    %r1,%r0,0x12            # switch to esame mode
         sam64                           # switch to 64 bit mode
+        llgfr   %r13,%r13               # clear high-order half of base reg
+        lmh     %r0,%r15,.Lzero64-.LPG1(%r13)   # clear high-order half
         lctlg   %c0,%c15,.Lctl-.LPG1(%r13)      # load control registers
         lg      %r12,.Lparmaddr-.LPG1(%r13)     # pointer to parameter area
                                         # move IPL device to lowcore
@@ -127,6 +129,7 @@ startup_continue:
 .L4malign:.quad 0xffffffffffc00000
 .Lscan2g:.quad  0x80000000 + 0x20000 - 8        # 2GB + 128K - 8
 .Lnop:  .long   0x07000700
+.Lzero64:.fill  16,4,0x0
 #ifdef CONFIG_ZFCPDUMP
 .Lcurrent_cpu:
         .long 0x0
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 061479ff029f..0663287fa1b3 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -305,9 +305,8 @@ static int __init early_parse_mem(char *p)
 }
 early_param("mem", early_parse_mem);
 
-#ifdef CONFIG_S390_SWITCH_AMODE
-unsigned int switch_amode = 0;
-EXPORT_SYMBOL_GPL(switch_amode);
+unsigned int user_mode = HOME_SPACE_MODE;
+EXPORT_SYMBOL_GPL(user_mode);
 
 static int set_amode_and_uaccess(unsigned long user_amode,
                                  unsigned long user32_amode)
@@ -340,23 +339,29 @@ static int set_amode_and_uaccess(unsigned long user_amode,
  */
 static int __init early_parse_switch_amode(char *p)
 {
-        switch_amode = 1;
+        if (user_mode != SECONDARY_SPACE_MODE)
+                user_mode = PRIMARY_SPACE_MODE;
         return 0;
 }
 early_param("switch_amode", early_parse_switch_amode);
 
-#else /* CONFIG_S390_SWITCH_AMODE */
-static inline int set_amode_and_uaccess(unsigned long user_amode,
-                                        unsigned long user32_amode)
+static int __init early_parse_user_mode(char *p)
 {
+        if (p && strcmp(p, "primary") == 0)
+                user_mode = PRIMARY_SPACE_MODE;
+#ifdef CONFIG_S390_EXEC_PROTECT
+        else if (p && strcmp(p, "secondary") == 0)
+                user_mode = SECONDARY_SPACE_MODE;
+#endif
+        else if (!p || strcmp(p, "home") == 0)
+                user_mode = HOME_SPACE_MODE;
+        else
+                return 1;
         return 0;
 }
-#endif /* CONFIG_S390_SWITCH_AMODE */
+early_param("user_mode", early_parse_user_mode);
 
 #ifdef CONFIG_S390_EXEC_PROTECT
-unsigned int s390_noexec = 0;
-EXPORT_SYMBOL_GPL(s390_noexec);
-
 /*
  * Enable execute protection?
  */
@@ -364,8 +369,7 @@ static int __init early_parse_noexec(char *p)
 {
         if (!strncmp(p, "off", 3))
                 return 0;
-        switch_amode = 1;
-        s390_noexec = 1;
+        user_mode = SECONDARY_SPACE_MODE;
         return 0;
 }
 early_param("noexec", early_parse_noexec);
@@ -373,7 +377,7 @@ early_param("noexec", early_parse_noexec);
 
 static void setup_addressing_mode(void)
 {
-        if (s390_noexec) {
+        if (user_mode == SECONDARY_SPACE_MODE) {
                 if (set_amode_and_uaccess(PSW_ASC_SECONDARY,
                                           PSW32_ASC_SECONDARY))
                         pr_info("Execute protection active, "
@@ -381,7 +385,7 @@ static void setup_addressing_mode(void)
                 else
                         pr_info("Execute protection active, "
                                 "mvcos not available\n");
-        } else if (switch_amode) {
+        } else if (user_mode == PRIMARY_SPACE_MODE) {
                 if (set_amode_and_uaccess(PSW_ASC_PRIMARY, PSW32_ASC_PRIMARY))
                         pr_info("Address spaces switched, "
                                 "mvcos available\n");
@@ -411,7 +415,7 @@ setup_lowcore(void)
         lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY;
         lc->restart_psw.addr =
                 PSW_ADDR_AMODE | (unsigned long) restart_int_handler;
-        if (switch_amode)
+        if (user_mode != HOME_SPACE_MODE)
                 lc->restart_psw.mask |= PSW_ASC_HOME;
         lc->external_new_psw.mask = psw_kernel_bits;
         lc->external_new_psw.addr =
diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index 68e1ecf5ebab..65065ac48ed3 100644
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -335,7 +335,7 @@ int get_sync_clock(unsigned long long *clock)
         sw0 = atomic_read(sw_ptr);
         *clock = get_clock();
         sw1 = atomic_read(sw_ptr);
-        put_cpu_var(clock_sync_sync);
+        put_cpu_var(clock_sync_word);
         if (sw0 == sw1 && (sw0 & 0x80000000U))
                 /* Success: time is in sync. */
                 return 0;
@@ -385,7 +385,7 @@ static inline int check_sync_clock(void)
 
         sw_ptr = &get_cpu_var(clock_sync_word);
         rc = (atomic_read(sw_ptr) & 0x80000000U) != 0;
-        put_cpu_var(clock_sync_sync);
+        put_cpu_var(clock_sync_word);
         return rc;
 }
 
diff --git a/arch/s390/kernel/vdso.c b/arch/s390/kernel/vdso.c
index adfb32aa6d59..5f99e66c51c3 100644
--- a/arch/s390/kernel/vdso.c
+++ b/arch/s390/kernel/vdso.c
@@ -86,7 +86,8 @@ static void vdso_init_data(struct vdso_data *vd)
         unsigned int facility_list;
 
         facility_list = stfl();
-        vd->ectg_available = switch_amode && (facility_list & 1);
+        vd->ectg_available =
+                user_mode != HOME_SPACE_MODE && (facility_list & 1);
 }
 
 #ifdef CONFIG_64BIT
@@ -114,7 +115,7 @@ int vdso_alloc_per_cpu(int cpu, struct _lowcore *lowcore)
 
         lowcore->vdso_per_cpu_data = __LC_PASTE;
 
-        if (!switch_amode || !vdso_enabled)
+        if (user_mode == HOME_SPACE_MODE || !vdso_enabled)
                 return 0;
 
         segment_table = __get_free_pages(GFP_KERNEL, SEGMENT_ORDER);
@@ -160,7 +161,7 @@ void vdso_free_per_cpu(int cpu, struct _lowcore *lowcore)
         unsigned long segment_table, page_table, page_frame;
         u32 *psal, *aste;
 
-        if (!switch_amode || !vdso_enabled)
+        if (user_mode == HOME_SPACE_MODE || !vdso_enabled)
                 return;
 
         psal = (u32 *)(addr_t) lowcore->paste[4];
@@ -184,7 +185,7 @@ static void __vdso_init_cr5(void *dummy)
 
 static void vdso_init_cr5(void)
 {
-        if (switch_amode && vdso_enabled)
+        if (user_mode != HOME_SPACE_MODE && vdso_enabled)
                 on_each_cpu(__vdso_init_cr5, NULL, 1);
 }
 #endif /* CONFIG_64BIT */