Merge branch 'linus' into cpus4096

Conflicts:
	kernel/trace/ring_buffer.c

9 files changed, 35 insertions, 39 deletions

diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c
index fa28ecae636b..3d144e6020c6 100644
--- a/arch/s390/kernel/asm-offsets.c
+++ b/arch/s390/kernel/asm-offsets.c
@@ -32,7 +32,7 @@ int main(void)
 	DEFINE(__PT_GPRS, offsetof(struct pt_regs, gprs));
 	DEFINE(__PT_ORIG_GPR2, offsetof(struct pt_regs, orig_gpr2));
 	DEFINE(__PT_ILC, offsetof(struct pt_regs, ilc));
-	DEFINE(__PT_TRAP, offsetof(struct pt_regs, trap));
+	DEFINE(__PT_SVCNR, offsetof(struct pt_regs, svcnr));
 	DEFINE(__PT_SIZE, sizeof(struct pt_regs));
 	BLANK();
 	DEFINE(__SF_BACKCHAIN, offsetof(struct stack_frame, back_chain));
diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c
index c7f02e777af2..b537cb0e9b55 100644
--- a/arch/s390/kernel/compat_signal.c
+++ b/arch/s390/kernel/compat_signal.c
@@ -340,7 +340,7 @@ static int restore_sigregs32(struct pt_regs *regs,_sigregs32 __user *sregs)
 		return err;
 
 	restore_fp_regs(&current->thread.fp_regs);
-	regs->trap = -1;	/* disable syscall checks */
+	regs->svcnr = 0;	/* disable syscall checks */
 	return 0;
 }
 
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 08844fc24a2e..198ea18a534d 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -46,7 +46,7 @@ SP_R14	     =	STACK_FRAME_OVERHEAD + __PT_GPRS + 56
 SP_R15	     =	STACK_FRAME_OVERHEAD + __PT_GPRS + 60
 SP_ORIG_R2   =	STACK_FRAME_OVERHEAD + __PT_ORIG_GPR2
 SP_ILC	     =	STACK_FRAME_OVERHEAD + __PT_ILC
-SP_TRAP      =	STACK_FRAME_OVERHEAD + __PT_TRAP
+SP_SVCNR     =	STACK_FRAME_OVERHEAD + __PT_SVCNR
 SP_SIZE      =	STACK_FRAME_OVERHEAD + __PT_SIZE
 
 _TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
@@ -183,11 +183,10 @@ STACK_SIZE  = 1 << STACK_SHIFT
 	.macro	CREATE_STACK_FRAME psworg,savearea
 	s	%r15,BASED(.Lc_spsize)	# make room for registers & psw
 	mvc	SP_PSW(8,%r15),0(%r12)	# move user PSW to stack
-	la	%r12,\psworg
 	st	%r2,SP_ORIG_R2(%r15)	# store original content of gpr 2
-	icm	%r12,12,__LC_SVC_ILC
+	icm	%r12,3,__LC_SVC_ILC
 	stm	%r0,%r11,SP_R0(%r15)	# store gprs %r0-%r11 to kernel stack
-	st	%r12,SP_ILC(%r15)
+	st	%r12,SP_SVCNR(%r15)
 	mvc	SP_R12(16,%r15),\savearea # move %r12-%r15 to stack
 	la	%r12,0
 	st	%r12,__SF_BACKCHAIN(%r15)	# clear back chain
@@ -264,16 +263,17 @@ sysc_update:
 #endif
 sysc_do_svc:
 	l	%r9,__LC_THREAD_INFO	# load pointer to thread_info struct
-	sla	%r7,2			# *4 and test for svc 0
+	ltr	%r7,%r7			# test for svc 0
 	bnz	BASED(sysc_nr_ok)	# svc number > 0
 	# svc 0: system call number in %r1
 	cl	%r1,BASED(.Lnr_syscalls)
 	bnl	BASED(sysc_nr_ok)
 	lr	%r7,%r1 	  # copy svc number to %r7
-	sla	%r7,2		  # *4
 sysc_nr_ok:
 	mvc	SP_ARGS(4,%r15),SP_R7(%r15)
 sysc_do_restart:
+	sth	%r7,SP_SVCNR(%r15)
+	sll	%r7,2		  # svc number *4
 	l	%r8,BASED(.Lsysc_table)
 	tm	__TI_flags+3(%r9),(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)
 	l	%r8,0(%r7,%r8)	  # get system call addr.
@@ -376,7 +376,6 @@ sysc_notify_resume:
 sysc_restart:
 	ni	__TI_flags+3(%r9),255-_TIF_RESTART_SVC # clear TIF_RESTART_SVC
 	l	%r7,SP_R2(%r15) 	# load new svc number
-	sla	%r7,2
 	mvc	SP_R2(4,%r15),SP_ORIG_R2(%r15) # restore first argument
 	lm	%r2,%r6,SP_R2(%r15)	# load svc arguments
 	b	BASED(sysc_do_restart)	# restart svc
@@ -386,7 +385,8 @@ sysc_restart:
 #
 sysc_singlestep:
 	ni	__TI_flags+3(%r9),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
-	mvi	SP_TRAP+1(%r15),0x28	# set trap indication to pgm check
+	mvi	SP_SVCNR(%r15),0xff	# set trap indication to pgm check
+	mvi	SP_SVCNR+1(%r15),0xff
 	la	%r2,SP_PTREGS(%r15)	# address of register-save area
 	l	%r1,BASED(.Lhandle_per)	# load adr. of per handler
 	la	%r14,BASED(sysc_return)	# load adr. of system return
@@ -407,7 +407,7 @@ sysc_tracesys:
 	bnl	BASED(sysc_tracenogo)
 	l	%r8,BASED(.Lsysc_table)
 	lr	%r7,%r2
-	sll	%r7,2			# *4
+	sll	%r7,2			# svc number *4
 	l	%r8,0(%r7,%r8)
 sysc_tracego:
 	lm	%r3,%r6,SP_R3(%r15)
@@ -586,7 +586,8 @@ pgm_svcper:
 # per was called from kernel, must be kprobes
 #
 kernel_per:
-	mvi	SP_TRAP+1(%r15),0x28	# set trap indication to pgm check
+	mvi	SP_SVCNR(%r15),0xff	# set trap indication to pgm check
+	mvi	SP_SVCNR+1(%r15),0xff
 	la	%r2,SP_PTREGS(%r15)	# address of register-save area
 	l	%r1,BASED(.Lhandle_per)	# load adr. of per handler
 	la	%r14,BASED(sysc_restore)# load adr. of system return
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
index 41aca06682aa..89c121ae6339 100644
--- a/arch/s390/kernel/entry64.S
+++ b/arch/s390/kernel/entry64.S
@@ -46,7 +46,7 @@ SP_R14	     =	STACK_FRAME_OVERHEAD + __PT_GPRS + 112
 SP_R15	     =	STACK_FRAME_OVERHEAD + __PT_GPRS + 120
 SP_ORIG_R2   =	STACK_FRAME_OVERHEAD + __PT_ORIG_GPR2
 SP_ILC	     =	STACK_FRAME_OVERHEAD + __PT_ILC
-SP_TRAP      =	STACK_FRAME_OVERHEAD + __PT_TRAP
+SP_SVCNR      =	STACK_FRAME_OVERHEAD + __PT_SVCNR
 SP_SIZE      =	STACK_FRAME_OVERHEAD + __PT_SIZE
 
 STACK_SHIFT = PAGE_SHIFT + THREAD_ORDER
@@ -171,11 +171,10 @@ _TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
 	.macro	CREATE_STACK_FRAME psworg,savearea
 	aghi	%r15,-SP_SIZE		# make room for registers & psw
 	mvc	SP_PSW(16,%r15),0(%r12)	# move user PSW to stack
-	la	%r12,\psworg
 	stg	%r2,SP_ORIG_R2(%r15)	# store original content of gpr 2
-	icm	%r12,12,__LC_SVC_ILC
+	icm	%r12,3,__LC_SVC_ILC
 	stmg	%r0,%r11,SP_R0(%r15)	# store gprs %r0-%r11 to kernel stack
-	st	%r12,SP_ILC(%r15)
+	st	%r12,SP_SVCNR(%r15)
 	mvc	SP_R12(32,%r15),\savearea # move %r12-%r15 to stack
 	la	%r12,0
 	stg	%r12,__SF_BACKCHAIN(%r15)
@@ -250,16 +249,17 @@ sysc_update:
 #endif
 sysc_do_svc:
 	lg	%r9,__LC_THREAD_INFO	# load pointer to thread_info struct
-	slag	%r7,%r7,2	# *4 and test for svc 0
+	ltgr	%r7,%r7		# test for svc 0
 	jnz	sysc_nr_ok
 	# svc 0: system call number in %r1
 	cl	%r1,BASED(.Lnr_syscalls)
 	jnl	sysc_nr_ok
 	lgfr	%r7,%r1 	# clear high word in r1
-	slag	%r7,%r7,2	# svc 0: system call number in %r1
 sysc_nr_ok:
 	mvc	SP_ARGS(8,%r15),SP_R7(%r15)
 sysc_do_restart:
+	sth	%r7,SP_SVCNR(%r15)
+	sllg	%r7,%r7,2	# svc number * 4
 	larl	%r10,sys_call_table
 #ifdef CONFIG_COMPAT
 	tm	__TI_flags+5(%r9),(_TIF_31BIT>>16)  # running in 31 bit mode ?
@@ -363,7 +363,6 @@ sysc_notify_resume:
 sysc_restart:
 	ni	__TI_flags+7(%r9),255-_TIF_RESTART_SVC # clear TIF_RESTART_SVC
 	lg	%r7,SP_R2(%r15)		# load new svc number
-	slag	%r7,%r7,2		# *4
 	mvc	SP_R2(8,%r15),SP_ORIG_R2(%r15) # restore first argument
 	lmg	%r2,%r6,SP_R2(%r15)	# load svc arguments
 	j	sysc_do_restart 	# restart svc
@@ -372,9 +371,8 @@ sysc_restart:
 # _TIF_SINGLE_STEP is set, call do_single_step
 #
 sysc_singlestep:
-	ni	__TI_flags+7(%r9),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
-	lhi	%r0,__LC_PGM_OLD_PSW
-	sth	%r0,SP_TRAP(%r15)	# set trap indication to pgm check
+	ni	__TI_flags+7(%r9),255-_TIF_SINGLE_STEP	# clear TIF_SINGLE_STEP
+	xc	SP_SVCNR(2,%r15),SP_SVCNR(%r15)		# clear svc number
 	la	%r2,SP_PTREGS(%r15)	# address of register-save area
 	larl	%r14,sysc_return	# load adr. of system return
 	jg	do_single_step		# branch to do_sigtrap
@@ -392,7 +390,7 @@ sysc_tracesys:
 	lghi	%r0,NR_syscalls
 	clgr	%r0,%r2
 	jnh	sysc_tracenogo
-	slag	%r7,%r2,2		# *4
+	sllg	%r7,%r2,2		# svc number *4
 	lgf	%r8,0(%r7,%r10)
 sysc_tracego:
 	lmg	%r3,%r6,SP_R3(%r15)
@@ -567,8 +565,7 @@ pgm_svcper:
 # per was called from kernel, must be kprobes
 #
 kernel_per:
-	lhi	%r0,__LC_PGM_OLD_PSW
-	sth	%r0,SP_TRAP(%r15)	# set trap indication to pgm check
+	xc	SP_SVCNR(2,%r15),SP_SVCNR(%r15)	# clear svc number
 	la	%r2,SP_PTREGS(%r15)	# address of register-save area
 	larl	%r14,sysc_restore	# load adr. of system ret, no work
 	jg	do_single_step		# branch to do_single_step
diff --git a/arch/s390/kernel/init_task.c b/arch/s390/kernel/init_task.c
index 7ad003969251..e80716843619 100644
--- a/arch/s390/kernel/init_task.c
+++ b/arch/s390/kernel/init_task.c
@@ -26,7 +26,7 @@ EXPORT_SYMBOL(init_mm);
 /*
  * Initial thread structure.
  *
- * We need to make sure that this is 8192-byte aligned due to the
+ * We need to make sure that this is THREAD_SIZE aligned due to the
  * way process stacks are handled. This is done by having a special
  * "init_task" linker map entry..
  */
diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index 1f31be1ecc4b..38ff2bce1203 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -657,7 +657,7 @@ asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
 		 * debugger stored an invalid system call number. Skip
 		 * the system call and the system call restart handling.
 		 */
-		regs->trap = -1;
+		regs->svcnr = 0;
 		ret = -1;
 	}
 
diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c
index 4f7fc3059a8e..8e6812a22670 100644
--- a/arch/s390/kernel/signal.c
+++ b/arch/s390/kernel/signal.c
@@ -160,7 +160,7 @@ static int restore_sigregs(struct pt_regs *regs, _sigregs __user *sregs)
 	current->thread.fp_regs.fpc &= FPC_VALID_MASK;
 
 	restore_fp_regs(&current->thread.fp_regs);
-	regs->trap = -1;	/* disable syscall checks */
+	regs->svcnr = 0;	/* disable syscall checks */
 	return 0;
 }
 
@@ -445,7 +445,7 @@ void do_signal(struct pt_regs *regs)
 		oldset = &current->blocked;
 
 	/* Are we from a system call? */
-	if (regs->trap == __LC_SVC_OLD_PSW) {
+	if (regs->svcnr) {
 		continue_addr = regs->psw.addr;
 		restart_addr = continue_addr - regs->ilc;
 		retval = regs->gprs[2];
@@ -462,7 +462,7 @@ void do_signal(struct pt_regs *regs)
 		case -ERESTART_RESTARTBLOCK:
 			regs->gprs[2] = -EINTR;
 		}
-		regs->trap = -1;	/* Don't deal with this again. */
+		regs->svcnr = 0;	/* Don't deal with this again. */
 	}
 
 	/* Get signal to deliver.  When running under ptrace, at this point
diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index b94e9e3b694a..eccefbbff887 100644
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -59,7 +59,7 @@
 
 static ext_int_info_t ext_int_info_cc;
 static ext_int_info_t ext_int_etr_cc;
-static u64 jiffies_timer_cc;
+static u64 sched_clock_base_cc;
 
 static DEFINE_PER_CPU(struct clock_event_device, comparators);
 
@@ -68,7 +68,7 @@ static DEFINE_PER_CPU(struct clock_event_device, comparators);
  */
 unsigned long long sched_clock(void)
 {
-	return ((get_clock_xt() - jiffies_timer_cc) * 125) >> 9;
+	return ((get_clock_xt() - sched_clock_base_cc) * 125) >> 9;
 }
 
 /*
@@ -229,13 +229,10 @@ static struct clocksource clocksource_tod = {
  */
 void __init time_init(void)
 {
-	u64 init_timer_cc;
-
-	init_timer_cc = reset_tod_clock();
-	jiffies_timer_cc = init_timer_cc - jiffies_64 * CLK_TICKS_PER_JIFFY;
+	sched_clock_base_cc = reset_tod_clock();
 
 	/* set xtime */
-	tod_to_timeval(init_timer_cc - TOD_UNIX_EPOCH, &xtime);
+	tod_to_timeval(sched_clock_base_cc - TOD_UNIX_EPOCH, &xtime);
         set_normalized_timespec(&wall_to_monotonic,
                                 -xtime.tv_sec, -xtime.tv_nsec);
 
@@ -289,7 +286,7 @@ static unsigned long long adjust_time(unsigned long long old,
 		delta = -delta;
 		adjust.offset = -ticks * (1000000 / HZ);
 	}
-	jiffies_timer_cc += delta;
+	sched_clock_base_cc += delta;
 	if (adjust.offset != 0) {
 		printk(KERN_NOTICE "etr: time adjusted by %li micro-seconds\n",
 		       adjust.offset);
diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S
index 607bd67a18ce..d796d05c9c01 100644
--- a/arch/s390/kernel/vmlinux.lds.S
+++ b/arch/s390/kernel/vmlinux.lds.S
@@ -2,6 +2,7 @@
  * Written by Martin Schwidefsky (schwidefsky@de.ibm.com)
  */
 
+#include <asm/thread_info.h>
 #include <asm/page.h>
 #include <asm-generic/vmlinux.lds.h>
 
@@ -86,7 +87,7 @@ SECTIONS
 	}
 	_edata = .;		/* End of data section */
 
-	. = ALIGN(2 * PAGE_SIZE);	/* init_task */
+	. = ALIGN(THREAD_SIZE);	/* init_task */
 	.data.init_task : {
 		*(.data.init_task)
 	}