Merge rsync://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

Conflicts:

	include/linux/kernel.h

1 files changed, 65 insertions, 25 deletions

diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index b2448487854..d8948c342ca 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -11,7 +11,6 @@
 
 #include <linux/sys.h>
 #include <linux/linkage.h>
-#include <linux/config.h>
 #include <asm/cache.h>
 #include <asm/lowcore.h>
 #include <asm/errno.h>
@@ -93,13 +92,22 @@ STACK_SIZE  = 1 << STACK_SHIFT
 	l	%r13,__LC_SVC_NEW_PSW+4	# load &system_call to %r13
 	.endm
 
-	.macro	SAVE_ALL psworg,savearea,sync
+	.macro	SAVE_ALL_SYNC psworg,savearea
 	la	%r12,\psworg
-	.if	\sync
 	tm	\psworg+1,0x01		# test problem state bit
 	bz	BASED(2f)		# skip stack setup save
 	l	%r15,__LC_KERNEL_STACK	# problem state -> load ksp
-	.else
+#ifdef CONFIG_CHECK_STACK
+	b	BASED(3f)
+2:	tml	%r15,STACK_SIZE - CONFIG_STACK_GUARD
+	bz	BASED(stack_overflow)
+3:
+#endif
+2:
+	.endm
+
+	.macro	SAVE_ALL_ASYNC psworg,savearea
+	la	%r12,\psworg
 	tm	\psworg+1,0x01		# test problem state bit
 	bnz	BASED(1f)		# from user -> load async stack
 	clc	\psworg+4(4),BASED(.Lcritical_end)
@@ -115,7 +123,6 @@ STACK_SIZE  = 1 << STACK_SHIFT
 	sra	%r14,STACK_SHIFT
 	be	BASED(2f)
 1:	l	%r15,__LC_ASYNC_STACK
-	.endif
 #ifdef CONFIG_CHECK_STACK
 	b	BASED(3f)
 2:	tml	%r15,STACK_SIZE - CONFIG_STACK_GUARD
@@ -196,7 +203,7 @@ system_call:
 	STORE_TIMER __LC_SYNC_ENTER_TIMER
 sysc_saveall:
 	SAVE_ALL_BASE __LC_SAVE_AREA
-        SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
+	SAVE_ALL_SYNC __LC_SVC_OLD_PSW,__LC_SAVE_AREA
 	CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
 	lh	%r7,0x8a	  # get svc number from lowcore
 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
@@ -221,8 +228,9 @@ sysc_do_svc:
 sysc_nr_ok:
 	mvc	SP_ARGS(4,%r15),SP_R7(%r15)
 sysc_do_restart:
+	l	%r8,BASED(.Lsysc_table)
 	tm	__TI_flags+3(%r9),(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)
-        l       %r8,sys_call_table-system_call(%r7,%r13) # get system call addr.
+	l	%r8,0(%r7,%r8)	  # get system call addr.
         bnz     BASED(sysc_tracesys)
         basr    %r14,%r8          # call sys_xxxx
         st      %r2,SP_R2(%r15)   # store return value (change R2 on stack)
@@ -323,9 +331,10 @@ sysc_tracesys:
 	basr	%r14,%r1
 	clc	SP_R2(4,%r15),BASED(.Lnr_syscalls)
 	bnl	BASED(sysc_tracenogo)
+	l	%r8,BASED(.Lsysc_table)
 	l	%r7,SP_R2(%r15)        # strace might have changed the 
 	sll	%r7,2                  #  system call
-	l	%r8,sys_call_table-system_call(%r7,%r13)
+	l	%r8,0(%r7,%r8)
 sysc_tracego:
 	lm	%r3,%r6,SP_R3(%r15)
 	l	%r2,SP_ORIG_R2(%r15)
@@ -425,7 +434,7 @@ pgm_check_handler:
 	SAVE_ALL_BASE __LC_SAVE_AREA
         tm      __LC_PGM_INT_CODE+1,0x80 # check whether we got a per exception
         bnz     BASED(pgm_per)           # got per exception -> special case
-	SAVE_ALL __LC_PGM_OLD_PSW,__LC_SAVE_AREA,1
+	SAVE_ALL_SYNC __LC_PGM_OLD_PSW,__LC_SAVE_AREA
 	CREATE_STACK_FRAME __LC_PGM_OLD_PSW,__LC_SAVE_AREA
 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
 	tm	SP_PSW+1(%r15),0x01	# interrupting from user ?
@@ -464,7 +473,7 @@ pgm_per:
 # Normal per exception
 #
 pgm_per_std:
-	SAVE_ALL __LC_PGM_OLD_PSW,__LC_SAVE_AREA,1
+	SAVE_ALL_SYNC __LC_PGM_OLD_PSW,__LC_SAVE_AREA
 	CREATE_STACK_FRAME __LC_PGM_OLD_PSW,__LC_SAVE_AREA
 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
 	tm	SP_PSW+1(%r15),0x01	# interrupting from user ?
@@ -490,7 +499,7 @@ pgm_no_vtime2:
 # it was a single stepped SVC that is causing all the trouble
 #
 pgm_svcper:
-	SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
+	SAVE_ALL_SYNC __LC_SVC_OLD_PSW,__LC_SAVE_AREA
 	CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
 	tm	SP_PSW+1(%r15),0x01	# interrupting from user ?
@@ -519,7 +528,7 @@ io_int_handler:
 	STORE_TIMER __LC_ASYNC_ENTER_TIMER
 	stck	__LC_INT_CLOCK
 	SAVE_ALL_BASE __LC_SAVE_AREA+16
-        SAVE_ALL __LC_IO_OLD_PSW,__LC_SAVE_AREA+16,0
+	SAVE_ALL_ASYNC __LC_IO_OLD_PSW,__LC_SAVE_AREA+16
 	CREATE_STACK_FRAME __LC_IO_OLD_PSW,__LC_SAVE_AREA+16
 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
 	tm	SP_PSW+1(%r15),0x01	# interrupting from user ?
@@ -631,7 +640,7 @@ ext_int_handler:
 	STORE_TIMER __LC_ASYNC_ENTER_TIMER
 	stck	__LC_INT_CLOCK
 	SAVE_ALL_BASE __LC_SAVE_AREA+16
-        SAVE_ALL __LC_EXT_OLD_PSW,__LC_SAVE_AREA+16,0
+	SAVE_ALL_ASYNC __LC_EXT_OLD_PSW,__LC_SAVE_AREA+16
 	CREATE_STACK_FRAME __LC_EXT_OLD_PSW,__LC_SAVE_AREA+16
 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
 	tm	SP_PSW+1(%r15),0x01	# interrupting from user ?
@@ -657,21 +666,31 @@ __critical_end:
         .globl mcck_int_handler
 mcck_int_handler:
 	spt	__LC_CPU_TIMER_SAVE_AREA	# revalidate cpu timer
-	mvc	__LC_ASYNC_ENTER_TIMER(8),__LC_CPU_TIMER_SAVE_AREA
 	lm	%r0,%r15,__LC_GPREGS_SAVE_AREA	# revalidate gprs
 	SAVE_ALL_BASE __LC_SAVE_AREA+32
 	la	%r12,__LC_MCK_OLD_PSW
 	tm	__LC_MCCK_CODE,0x80     # system damage?
 	bo	BASED(mcck_int_main)	# yes -> rest of mcck code invalid
-	tm	__LC_MCCK_CODE+5,0x02   # stored cpu timer value valid?
-	bo	BASED(0f)
-	spt	__LC_LAST_UPDATE_TIMER	# revalidate cpu timer
 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
-	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
+	mvc	__LC_SAVE_AREA+52(8),__LC_ASYNC_ENTER_TIMER
+	mvc	__LC_ASYNC_ENTER_TIMER(8),__LC_CPU_TIMER_SAVE_AREA
+	tm	__LC_MCCK_CODE+5,0x02	# stored cpu timer value valid?
+	bo	BASED(1f)
+	la	%r14,__LC_SYNC_ENTER_TIMER
+	clc	0(8,%r14),__LC_ASYNC_ENTER_TIMER
+	bl	BASED(0f)
+	la	%r14,__LC_ASYNC_ENTER_TIMER
+0:	clc	0(8,%r14),__LC_EXIT_TIMER
+	bl	BASED(0f)
+	la	%r14,__LC_EXIT_TIMER
+0:	clc	0(8,%r14),__LC_LAST_UPDATE_TIMER
+	bl	BASED(0f)
+	la	%r14,__LC_LAST_UPDATE_TIMER
+0:	spt	0(%r14)
+	mvc	__LC_ASYNC_ENTER_TIMER(8),0(%r14)
+1:
 #endif
-0:	tm	__LC_MCCK_CODE+2,0x09   # mwp + ia of old psw valid?
+	tm	__LC_MCCK_CODE+2,0x09	# mwp + ia of old psw valid?
 	bno	BASED(mcck_int_main)	# no -> skip cleanup critical
 	tm	__LC_MCK_OLD_PSW+1,0x01	# test problem state bit
 	bnz	BASED(mcck_int_main)	# from user -> load async stack
@@ -691,7 +710,7 @@ mcck_int_main:
 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
 	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 ?
+	tm	SP_PSW+1(%r15),0x01	# interrupting from user ?
 	bz	BASED(mcck_no_vtime)
 	UPDATE_VTIME __LC_EXIT_TIMER,__LC_ASYNC_ENTER_TIMER,__LC_USER_TIMER
 	UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
@@ -715,6 +734,20 @@ mcck_no_vtime:
 	l	%r1,BASED(.Ls390_handle_mcck)
 	basr	%r14,%r1		# call machine check handler
 mcck_return:
+	mvc	__LC_RETURN_MCCK_PSW(8),SP_PSW(%r15) # move return PSW
+	ni	__LC_RETURN_MCCK_PSW+1,0xfd # clear wait state bit
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+	mvc	__LC_ASYNC_ENTER_TIMER(8),__LC_SAVE_AREA+52
+	tm	__LC_RETURN_MCCK_PSW+1,0x01 # returning to user ?
+	bno	BASED(0f)
+	lm	%r0,%r15,SP_R0(%r15)	# load gprs 0-15
+	stpt	__LC_EXIT_TIMER
+	lpsw	__LC_RETURN_MCCK_PSW	# back to caller
+0:
+#endif
+	lm	%r0,%r15,SP_R0(%r15)	# load gprs 0-15
+	lpsw	__LC_RETURN_MCCK_PSW	# back to caller
+
         RESTORE_ALL __LC_RETURN_MCCK_PSW,0
 
 #ifdef CONFIG_SMP
@@ -781,6 +814,8 @@ cleanup_table_sysc_leave:
 	.long	sysc_leave + 0x80000000, sysc_work_loop + 0x80000000
 cleanup_table_sysc_work_loop:
 	.long	sysc_work_loop + 0x80000000, sysc_reschedule + 0x80000000
+cleanup_table_io_return:
+	.long	io_return + 0x80000000, io_leave + 0x80000000
 cleanup_table_io_leave:
 	.long	io_leave + 0x80000000, io_done + 0x80000000
 cleanup_table_io_work_loop:
@@ -807,6 +842,11 @@ cleanup_critical:
 	clc	4(4,%r12),BASED(cleanup_table_sysc_work_loop+4)
 	bl	BASED(cleanup_sysc_return)
 0:
+	clc	4(4,%r12),BASED(cleanup_table_io_return)
+	bl	BASED(0f)
+	clc	4(4,%r12),BASED(cleanup_table_io_return+4)
+	bl	BASED(cleanup_io_return)
+0:
 	clc	4(4,%r12),BASED(cleanup_table_io_leave)
 	bl	BASED(0f)
 	clc	4(4,%r12),BASED(cleanup_table_io_leave+4)
@@ -839,7 +879,7 @@ cleanup_system_call:
 	mvc	__LC_SAVE_AREA(16),0(%r12)
 0:	st	%r13,4(%r12)
 	st	%r12,__LC_SAVE_AREA+48	# argh
-	SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
+	SAVE_ALL_SYNC __LC_SVC_OLD_PSW,__LC_SAVE_AREA
 	CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
 	l	%r12,__LC_SAVE_AREA+48	# argh
 	st	%r15,12(%r12)
@@ -971,6 +1011,7 @@ cleanup_io_leave_insn:
 .Ltrace:       .long  syscall_trace
 .Lvfork:       .long  sys_vfork
 .Lschedtail:   .long  schedule_tail
+.Lsysc_table:  .long  sys_call_table
 
 .Lcritical_start:
                .long  __critical_start + 0x80000000
@@ -979,9 +1020,8 @@ cleanup_io_leave_insn:
 .Lcleanup_critical:
                .long  cleanup_critical
 
+	       .section .rodata, "a"
 #define SYSCALL(esa,esame,emu)	.long esa
-	.globl  sys_call_table
 sys_call_table:
 #include "syscalls.S"
 #undef SYSCALL
-