Merge branch 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied...

[linux-2.6-omap-h63xx.git] / arch / s390 / kernel / entry.S

diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index ed500ef799b795a21f322ae0d8e818b8bd926a36..198ea18a534d0d9c74e68f99b44649b92e852c69 100644 (file)
--- 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 | \
@@ -61,22 +61,25 @@ STACK_SIZE  = 1 << STACK_SHIFT
 
 #ifdef CONFIG_TRACE_IRQFLAGS
        .macro  TRACE_IRQS_ON
-       l       %r1,BASED(.Ltrace_irq_on)
+       basr    %r2,%r0
+       l       %r1,BASED(.Ltrace_irq_on_caller)
        basr    %r14,%r1
        .endm
 
        .macro  TRACE_IRQS_OFF
-       l       %r1,BASED(.Ltrace_irq_off)
+       basr    %r2,%r0
+       l       %r1,BASED(.Ltrace_irq_off_caller)
        basr    %r14,%r1
        .endm
 
        .macro  TRACE_IRQS_CHECK
+       basr    %r2,%r0
        tm      SP_PSW(%r15),0x03       # irqs enabled?
        jz      0f
-       l       %r1,BASED(.Ltrace_irq_on)
+       l       %r1,BASED(.Ltrace_irq_on_caller)
        basr    %r14,%r1
        j       1f
-0:     l       %r1,BASED(.Ltrace_irq_off)
+0:     l       %r1,BASED(.Ltrace_irq_off_caller)
        basr    %r14,%r1
 1:
        .endm
@@ -180,11 +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
@@ -261,16 +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.
@@ -373,7 +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
@@ -383,7 +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
@@ -404,7 +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)
@@ -583,7 +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
@@ -1113,9 +1117,12 @@ cleanup_io_leave_insn:
 .Lschedtail:   .long   schedule_tail
 .Lsysc_table:  .long   sys_call_table
 #ifdef CONFIG_TRACE_IRQFLAGS
-.Ltrace_irq_on: .long  trace_hardirqs_on
-.Ltrace_irq_off:
-               .long   trace_hardirqs_off
+.Ltrace_irq_on_caller:
+               .long   trace_hardirqs_on_caller
+.Ltrace_irq_off_caller:
+               .long   trace_hardirqs_off_caller
+#endif
+#ifdef CONFIG_LOCKDEP
 .Llockdep_sys_exit:
                .long   lockdep_sys_exit
 #endif