25 files changed, 467 insertions, 69 deletions

diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index aacf11d33723..3bbc74437d52 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -9,9 +9,13 @@ config PARISC
         def_bool y
         select HAVE_IDE
         select HAVE_OPROFILE
+        select HAVE_FUNCTION_TRACER if 64BIT
+        select HAVE_FUNCTION_GRAPH_TRACER if 64BIT
+        select HAVE_FUNCTION_TRACE_MCOUNT_TEST if 64BIT
         select RTC_CLASS
         select RTC_DRV_PARISC
         select INIT_ALL_POSSIBLE
+        select BUG
         help
           The PA-RISC microprocessor is designed by Hewlett-Packard and used
           in many of their workstations & servers (HP9000 700 and 800 series,
@@ -75,6 +79,9 @@ config GENERIC_HARDIRQS
 config GENERIC_IRQ_PROBE
         def_bool y
 
+config HAVE_LATENCYTOP_SUPPORT
+        def_bool y
+
 config IRQ_PER_CPU
         bool
         default y
@@ -83,6 +90,9 @@ config IRQ_PER_CPU
 config PM
         bool
 
+config STACKTRACE_SUPPORT
+        def_bool y
+
 config ISA_DMA_API
         bool
 
diff --git a/arch/parisc/Makefile b/arch/parisc/Makefile
index 0d428278356d..da6f66901c92 100644
--- a/arch/parisc/Makefile
+++ b/arch/parisc/Makefile
@@ -56,7 +56,9 @@ cflags-y	+= -mdisable-fpregs
 
 # Without this, "ld -r" results in .text sections that are too big
 # (> 0x40000) for branches to reach stubs.
-cflags-y        += -ffunction-sections
+ifndef CONFIG_FUNCTION_TRACER
+  cflags-y      += -ffunction-sections
+endif
 
 # select which processor to optimise for
 cflags-$(CONFIG_PA7100)         += -march=1.1 -mschedule=7100
diff --git a/arch/parisc/include/asm/atomic.h b/arch/parisc/include/asm/atomic.h
index edbfe25c5fc1..ada3e5364d82 100644
--- a/arch/parisc/include/asm/atomic.h
+++ b/arch/parisc/include/asm/atomic.h
@@ -25,7 +25,7 @@
  * Since "a" is usually an address, use one spinlock per cacheline.
  */
 #  define ATOMIC_HASH_SIZE 4
-#  define ATOMIC_HASH(a) (&(__atomic_hash[ (((unsigned long) a)/L1_CACHE_BYTES) & (ATOMIC_HASH_SIZE-1) ]))
+#  define ATOMIC_HASH(a) (&(__atomic_hash[ (((unsigned long) (a))/L1_CACHE_BYTES) & (ATOMIC_HASH_SIZE-1) ]))
 
 extern raw_spinlock_t __atomic_hash[ATOMIC_HASH_SIZE] __lock_aligned;
 
@@ -222,13 +222,13 @@ static __inline__ int atomic_add_unless(atomic_t *v, int a, int u)
 
 #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
 
-#define atomic_add(i,v) ((void)(__atomic_add_return( ((int)i),(v))))
-#define atomic_sub(i,v) ((void)(__atomic_add_return(-((int)i),(v))))
+#define atomic_add(i,v) ((void)(__atomic_add_return( ((int)(i)),(v))))
+#define atomic_sub(i,v) ((void)(__atomic_add_return(-((int)(i)),(v))))
 #define atomic_inc(v)   ((void)(__atomic_add_return(   1,(v))))
 #define atomic_dec(v)   ((void)(__atomic_add_return(  -1,(v))))
 
-#define atomic_add_return(i,v)  (__atomic_add_return( ((int)i),(v)))
-#define atomic_sub_return(i,v)  (__atomic_add_return(-((int)i),(v)))
+#define atomic_add_return(i,v)  (__atomic_add_return( ((int)(i)),(v)))
+#define atomic_sub_return(i,v)  (__atomic_add_return(-((int)(i)),(v)))
 #define atomic_inc_return(v)    (__atomic_add_return(   1,(v)))
 #define atomic_dec_return(v)    (__atomic_add_return(  -1,(v)))
 
@@ -289,13 +289,13 @@ atomic64_read(const atomic64_t *v)
         return v->counter;
 }
 
-#define atomic64_add(i,v)       ((void)(__atomic64_add_return( ((s64)i),(v))))
-#define atomic64_sub(i,v)       ((void)(__atomic64_add_return(-((s64)i),(v))))
+#define atomic64_add(i,v)       ((void)(__atomic64_add_return( ((s64)(i)),(v))))
+#define atomic64_sub(i,v)       ((void)(__atomic64_add_return(-((s64)(i)),(v))))
 #define atomic64_inc(v)         ((void)(__atomic64_add_return(   1,(v))))
 #define atomic64_dec(v)         ((void)(__atomic64_add_return(  -1,(v))))
 
-#define atomic64_add_return(i,v)        (__atomic64_add_return( ((s64)i),(v)))
-#define atomic64_sub_return(i,v)        (__atomic64_add_return(-((s64)i),(v)))
+#define atomic64_add_return(i,v)        (__atomic64_add_return( ((s64)(i)),(v)))
+#define atomic64_sub_return(i,v)        (__atomic64_add_return(-((s64)(i)),(v)))
 #define atomic64_inc_return(v)          (__atomic64_add_return(   1,(v)))
 #define atomic64_dec_return(v)          (__atomic64_add_return(  -1,(v)))
 
diff --git a/arch/parisc/include/asm/ftrace.h b/arch/parisc/include/asm/ftrace.h
new file mode 100644
index 000000000000..2fa05dd6aeee
--- /dev/null
+++ b/arch/parisc/include/asm/ftrace.h
@@ -0,0 +1,25 @@
+#ifndef _ASM_PARISC_FTRACE_H
+#define _ASM_PARISC_FTRACE_H
+
+#ifndef __ASSEMBLY__
+extern void mcount(void);
+
+/*
+ * Stack of return addresses for functions of a thread.
+ * Used in struct thread_info
+ */
+struct ftrace_ret_stack {
+        unsigned long ret;
+        unsigned long func;
+        unsigned long long calltime;
+};
+
+/*
+ * Primary handler of a function return.
+ * It relays on ftrace_return_to_handler.
+ * Defined in entry.S
+ */
+extern void return_to_handler(void);
+#endif /* __ASSEMBLY__ */
+
+#endif /* _ASM_PARISC_FTRACE_H */
diff --git a/arch/parisc/include/asm/page.h b/arch/parisc/include/asm/page.h
index c3941f09a878..7bc5125d7d4c 100644
--- a/arch/parisc/include/asm/page.h
+++ b/arch/parisc/include/asm/page.h
@@ -36,16 +36,7 @@ void clear_user_page(void *page, unsigned long vaddr, struct page *pg);
  */
 #define STRICT_MM_TYPECHECKS
 #ifdef STRICT_MM_TYPECHECKS
-typedef struct { unsigned long pte;
-#if !defined(CONFIG_64BIT)
-                 unsigned long future_flags;
- /* XXX: it's possible to remove future_flags and change BITS_PER_PTE_ENTRY
-         to 2, but then strangely the identical 32bit kernel boots on a
-         c3000(pa20), but not any longer on a 715(pa11).
-         Still investigating... HelgeD.
-  */
-#endif
-} pte_t; /* either 32 or 64bit */
+typedef struct { unsigned long pte; } pte_t; /* either 32 or 64bit */
 
 /* NOTE: even on 64 bits, these entries are __u32 because we allocate
  * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */
@@ -111,7 +102,7 @@ extern int npmem_ranges;
 #define BITS_PER_PMD_ENTRY      2
 #define BITS_PER_PGD_ENTRY      2
 #else
-#define BITS_PER_PTE_ENTRY      3
+#define BITS_PER_PTE_ENTRY      2
 #define BITS_PER_PMD_ENTRY      2
 #define BITS_PER_PGD_ENTRY      BITS_PER_PMD_ENTRY
 #endif
diff --git a/arch/parisc/include/asm/pdc.h b/arch/parisc/include/asm/pdc.h
index c584b00c6074..4ca510b3c6f8 100644
--- a/arch/parisc/include/asm/pdc.h
+++ b/arch/parisc/include/asm/pdc.h
@@ -49,6 +49,8 @@
 #define PDC_MODEL_CPU_ID        6       /* returns cpu-id (only newer machines!) */
 #define PDC_MODEL_CAPABILITIES  7       /* returns OS32/OS64-flags      */
 /* Values for PDC_MODEL_CAPABILITIES non-equivalent virtual aliasing support */
+#define  PDC_MODEL_OS64                 (1 << 0)
+#define  PDC_MODEL_OS32                 (1 << 1)
 #define  PDC_MODEL_IOPDIR_FDC           (1 << 2)
 #define  PDC_MODEL_NVA_MASK             (3 << 4)
 #define  PDC_MODEL_NVA_SUPPORTED        (0 << 4)
@@ -336,10 +338,13 @@
 #define NUM_PDC_RESULT  32
 
 #if !defined(__ASSEMBLY__)
-#ifdef __KERNEL__
 
 #include <linux/types.h>
 
+#ifdef __KERNEL__
+
+#include <asm/page.h> /* for __PAGE_OFFSET */
+
 extern int pdc_type;
 
 /* Values for pdc_type */
diff --git a/arch/parisc/include/asm/pgtable.h b/arch/parisc/include/asm/pgtable.h
index 470a4b88124d..a27d2e200fb2 100644
--- a/arch/parisc/include/asm/pgtable.h
+++ b/arch/parisc/include/asm/pgtable.h
@@ -50,11 +50,7 @@
         printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, (unsigned long)pgd_val(e))
 
 /* This is the size of the initially mapped kernel memory */
-#ifdef CONFIG_64BIT
 #define KERNEL_INITIAL_ORDER    24      /* 0 to 1<<24 = 16MB */
-#else
-#define KERNEL_INITIAL_ORDER    23      /* 0 to 1<<23 = 8MB */
-#endif
 #define KERNEL_INITIAL_SIZE     (1 << KERNEL_INITIAL_ORDER)
 
 #if defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB)
@@ -91,16 +87,25 @@
 
 /* Definitions for 1st level */
 #define PGDIR_SHIFT     (PMD_SHIFT + BITS_PER_PMD)
+#if (PGDIR_SHIFT + PAGE_SHIFT + PGD_ORDER - BITS_PER_PGD_ENTRY) > BITS_PER_LONG
+#define BITS_PER_PGD    (BITS_PER_LONG - PGDIR_SHIFT)
+#else
 #define BITS_PER_PGD    (PAGE_SHIFT + PGD_ORDER - BITS_PER_PGD_ENTRY)
+#endif
 #define PGDIR_SIZE      (1UL << PGDIR_SHIFT)
 #define PGDIR_MASK      (~(PGDIR_SIZE-1))
 #define PTRS_PER_PGD    (1UL << BITS_PER_PGD)
 #define USER_PTRS_PER_PGD       PTRS_PER_PGD
 
+#ifdef CONFIG_64BIT
 #define MAX_ADDRBITS    (PGDIR_SHIFT + BITS_PER_PGD)
 #define MAX_ADDRESS     (1UL << MAX_ADDRBITS)
-
 #define SPACEID_SHIFT   (MAX_ADDRBITS - 32)
+#else
+#define MAX_ADDRBITS    (BITS_PER_LONG)
+#define MAX_ADDRESS     (1UL << MAX_ADDRBITS)
+#define SPACEID_SHIFT   0
+#endif
 
 /* This calculates the number of initial pages we need for the initial
  * page tables */
diff --git a/arch/parisc/include/asm/socket.h b/arch/parisc/include/asm/socket.h
index fba402c95ac2..885472bf7b78 100644
--- a/arch/parisc/include/asm/socket.h
+++ b/arch/parisc/include/asm/socket.h
@@ -54,6 +54,9 @@
 
 #define SO_MARK                 0x401f
 
+#define SO_TIMESTAMPING         0x4020
+#define SCM_TIMESTAMPING        SO_TIMESTAMPING
+
 /* O_NONBLOCK clashes with the bits used for socket types.  Therefore we
  * have to define SOCK_NONBLOCK to a different value here.
  */
diff --git a/arch/parisc/include/asm/swab.h b/arch/parisc/include/asm/swab.h
index 3ff16c5a3358..e78403b129ef 100644
--- a/arch/parisc/include/asm/swab.h
+++ b/arch/parisc/include/asm/swab.h
@@ -1,7 +1,7 @@
 #ifndef _PARISC_SWAB_H
 #define _PARISC_SWAB_H
 
-#include <asm/types.h>
+#include <linux/types.h>
 #include <linux/compiler.h>
 
 #define __SWAB_64_THRU_32__
diff --git a/arch/parisc/kernel/Makefile b/arch/parisc/kernel/Makefile
index 016d3fc4111c..67db0722e6ca 100644
--- a/arch/parisc/kernel/Makefile
+++ b/arch/parisc/kernel/Makefile
@@ -11,10 +11,25 @@ obj-y	     	:= cache.o pacache.o setup.o traps.o time.o irq.o \
                    process.o processor.o pdc_cons.o pdc_chassis.o unwind.o \
                    topology.o
 
+ifdef CONFIG_FUNCTION_TRACER
+# Do not profile debug and lowlevel utilities
+CFLAGS_REMOVE_ftrace.o = -pg
+CFLAGS_REMOVE_cache.o = -pg
+CFLAGS_REMOVE_irq.o = -pg
+CFLAGS_REMOVE_pacache.o = -pg
+CFLAGS_REMOVE_perf.o = -pg
+CFLAGS_REMOVE_traps.o = -pg
+CFLAGS_REMOVE_unaligned.o = -pg
+CFLAGS_REMOVE_unwind.o = -pg
+endif
+
 obj-$(CONFIG_SMP)       += smp.o
 obj-$(CONFIG_PA11)      += pci-dma.o
 obj-$(CONFIG_PCI)       += pci.o
 obj-$(CONFIG_MODULES)   += module.o
 obj-$(CONFIG_64BIT)     += binfmt_elf32.o sys_parisc32.o signal32.o
+obj-$(CONFIG_STACKTRACE)+= stacktrace.o
 # only supported for PCX-W/U in 64-bit mode at the moment
 obj-$(CONFIG_64BIT)     += perf.o perf_asm.o
+obj-$(CONFIG_FUNCTION_TRACER)           += ftrace.o
+obj-$(CONFIG_FUNCTION_GRAPH_TRACER)     += ftrace.o
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
index 0db9fdcb7709..ae3e70cd1e14 100644
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -505,6 +505,18 @@
         STREG           \pte,0(\ptep)
         .endm
 
+        /* bitshift difference between a PFN (based on kernel's PAGE_SIZE)
+         * to a CPU TLB 4k PFN (4k => 12 bits to shift) */
+        #define PAGE_ADD_SHIFT  (PAGE_SHIFT-12)
+
+        /* Drop prot bits and convert to page addr for iitlbt and idtlbt */
+        .macro          convert_for_tlb_insert20 pte
+        extrd,u         \pte,(63-ASM_PFN_PTE_SHIFT)+(63-58)+PAGE_ADD_SHIFT,\
+                                64-PAGE_SHIFT-PAGE_ADD_SHIFT,\pte
+        depdi           _PAGE_SIZE_ENCODING_DEFAULT,63,\
+                                (63-58)+PAGE_ADD_SHIFT,\pte
+        .endm
+
         /* Convert the pte and prot to tlb insertion values.  How
          * this happens is quite subtle, read below */
         .macro          make_insert_tlb spc,pte,prot
@@ -544,8 +556,7 @@
         depi            1,12,1,\prot
 
         /* Drop prot bits and convert to page addr for iitlbt and idtlbt */
-        extrd,u         \pte,(63-ASM_PFN_PTE_SHIFT)+(63-58),64-PAGE_SHIFT,\pte
-        depdi           _PAGE_SIZE_ENCODING_DEFAULT,63,63-58,\pte
+        convert_for_tlb_insert20 \pte
         .endm
 
         /* Identical macro to make_insert_tlb above, except it
@@ -563,8 +574,8 @@
 
         /* Get rid of prot bits and convert to page addr for iitlba */
 
-        depi            _PAGE_SIZE_ENCODING_DEFAULT,31,ASM_PFN_PTE_SHIFT,\pte
-        extru           \pte,24,25,\pte
+        depi            0,31,ASM_PFN_PTE_SHIFT,\pte
+        SHRREG          \pte,(ASM_PFN_PTE_SHIFT-(31-26)),\pte
         .endm
 
         /* This is for ILP32 PA2.0 only.  The TLB insertion needs
@@ -1244,10 +1255,9 @@ nadtlb_check_flush_20w:
         depdi,z         7,7,3,prot
         depdi           1,10,1,prot
 
-        /* Get rid of prot bits and convert to page addr for idtlbt */
+        /* Drop prot bits from pte and convert to page addr for idtlbt */
+        convert_for_tlb_insert20 pte
 
-        depdi           0,63,12,pte
-        extrd,u         pte,56,52,pte
         idtlbt          pte,prot
 
         rfir
@@ -1337,8 +1347,8 @@ nadtlb_check_flush_11:
 
         /* Get rid of prot bits and convert to page addr for idtlba */
 
-        depi            0,31,12,pte
-        extru           pte,24,25,pte
+        depi            0,31,ASM_PFN_PTE_SHIFT,pte
+        SHRREG          pte,(ASM_PFN_PTE_SHIFT-(31-26)),pte
 
         mfsp            %sr1,t0  /* Save sr1 so we can use it in tlb inserts */
         mtsp            spc,%sr1
@@ -1403,10 +1413,9 @@ nadtlb_check_flush_20:
         depdi,z         7,7,3,prot
         depdi           1,10,1,prot
 
-        /* Get rid of prot bits and convert to page addr for idtlbt */
+        /* Drop prot bits from pte and convert to page addr for idtlbt */
+        convert_for_tlb_insert20 pte
 
-        depdi           0,63,12,pte
-        extrd,u         pte,56,32,pte
         idtlbt          pte,prot
 
         rfir
@@ -2176,6 +2185,33 @@ syscall_do_resched:
 ENDPROC(syscall_exit)
 
 
+#ifdef CONFIG_FUNCTION_TRACER
+        .import ftrace_function_trampoline,code
+ENTRY(_mcount)
+        copy    %r3, %arg2
+        b       ftrace_function_trampoline
+        nop
+ENDPROC(_mcount)
+
+ENTRY(return_to_handler)
+        load32  return_trampoline, %rp
+        copy    %ret0, %arg0
+        copy    %ret1, %arg1
+        b       ftrace_return_to_handler
+        nop
+return_trampoline:
+        copy    %ret0, %rp
+        copy    %r23, %ret0
+        copy    %r24, %ret1
+
+.globl ftrace_stub
+ftrace_stub:
+        bv      %r0(%rp)
+        nop
+ENDPROC(return_to_handler)
+#endif  /* CONFIG_FUNCTION_TRACER */
+
+
 get_register:
         /*
          * get_register is used by the non access tlb miss handlers to
diff --git a/arch/parisc/kernel/firmware.c b/arch/parisc/kernel/firmware.c
index f6d241238a78..4c247e02d9b1 100644
--- a/arch/parisc/kernel/firmware.c
+++ b/arch/parisc/kernel/firmware.c
@@ -527,7 +527,11 @@ int pdc_model_capabilities(unsigned long *capabilities)
         pdc_result[0] = 0; /* preset zero (call may not be implemented!) */
         retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES, __pa(pdc_result), 0);
         convert_to_wide(pdc_result);
-        *capabilities = pdc_result[0];
+        if (retval == PDC_OK) {
+                *capabilities = pdc_result[0];
+        } else {
+                *capabilities = PDC_MODEL_OS32;
+        }
         spin_unlock_irqrestore(&pdc_lock, flags);
 
         return retval;
diff --git a/arch/parisc/kernel/ftrace.c b/arch/parisc/kernel/ftrace.c
new file mode 100644
index 000000000000..9877372ffdba
--- /dev/null
+++ b/arch/parisc/kernel/ftrace.c
@@ -0,0 +1,185 @@
+/*
+ * Code for tracing calls in Linux kernel.
+ * Copyright (C) 2009 Helge Deller <deller@gmx.de>
+ *
+ * based on code for x86 which is:
+ * Copyright (C) 2007-2008 Steven Rostedt <srostedt@redhat.com>
+ *
+ * future possible enhancements:
+ *      - add CONFIG_DYNAMIC_FTRACE
+ *      - add CONFIG_STACK_TRACER
+ */
+
+#include <linux/init.h>
+#include <linux/ftrace.h>
+
+#include <asm/sections.h>
+#include <asm/ftrace.h>
+
+
+
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+
+/* Add a function return address to the trace stack on thread info.*/
+static int push_return_trace(unsigned long ret, unsigned long long time,
+                                unsigned long func, int *depth)
+{
+        int index;
+
+        if (!current->ret_stack)
+                return -EBUSY;
+
+        /* The return trace stack is full */
+        if (current->curr_ret_stack == FTRACE_RETFUNC_DEPTH - 1) {
+                atomic_inc(&current->trace_overrun);
+                return -EBUSY;
+        }
+
+        index = ++current->curr_ret_stack;
+        barrier();
+        current->ret_stack[index].ret = ret;
+        current->ret_stack[index].func = func;
+        current->ret_stack[index].calltime = time;
+        *depth = index;
+
+        return 0;
+}
+
+/* Retrieve a function return address to the trace stack on thread info.*/
+static void pop_return_trace(struct ftrace_graph_ret *trace, unsigned long *ret)
+{
+        int index;
+
+        index = current->curr_ret_stack;
+
+        if (unlikely(index < 0)) {
+                ftrace_graph_stop();
+                WARN_ON(1);
+                /* Might as well panic, otherwise we have no where to go */
+                *ret = (unsigned long)
+                        dereference_function_descriptor(&panic);
+                return;
+        }
+
+        *ret = current->ret_stack[index].ret;
+        trace->func = current->ret_stack[index].func;
+        trace->calltime = current->ret_stack[index].calltime;
+        trace->overrun = atomic_read(&current->trace_overrun);
+        trace->depth = index;
+        barrier();
+        current->curr_ret_stack--;
+
+}
+
+/*
+ * Send the trace to the ring-buffer.
+ * @return the original return address.
+ */
+unsigned long ftrace_return_to_handler(unsigned long retval0,
+                                       unsigned long retval1)
+{
+        struct ftrace_graph_ret trace;
+        unsigned long ret;
+
+        pop_return_trace(&trace, &ret);
+        trace.rettime = cpu_clock(raw_smp_processor_id());
+        ftrace_graph_return(&trace);
+
+        if (unlikely(!ret)) {
+                ftrace_graph_stop();
+                WARN_ON(1);
+                /* Might as well panic. What else to do? */
+                ret = (unsigned long)
+                        dereference_function_descriptor(&panic);
+        }
+
+        /* HACK: we hand over the old functions' return values
+           in %r23 and %r24. Assembly in entry.S will take care
+           and move those to their final registers %ret0 and %ret1 */
+        asm( "copy %0, %%r23 \n\t"
+             "copy %1, %%r24 \n" : : "r" (retval0), "r" (retval1) );
+
+        return ret;
+}
+
+/*
+ * Hook the return address and push it in the stack of return addrs
+ * in current thread info.
+ */
+void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr)
+{
+        unsigned long old;
+        unsigned long long calltime;
+        struct ftrace_graph_ent trace;
+
+        if (unlikely(atomic_read(&current->tracing_graph_pause)))
+                return;
+
+        old = *parent;
+        *parent = (unsigned long)
+                  dereference_function_descriptor(&return_to_handler);
+
+        if (unlikely(!__kernel_text_address(old))) {
+                ftrace_graph_stop();
+                *parent = old;
+                WARN_ON(1);
+                return;
+        }
+
+        calltime = cpu_clock(raw_smp_processor_id());
+
+        if (push_return_trace(old, calltime,
+                                self_addr, &trace.depth) == -EBUSY) {
+                *parent = old;
+                return;
+        }
+
+        trace.func = self_addr;
+
+        /* Only trace if the calling function expects to */
+        if (!ftrace_graph_entry(&trace)) {
+                current->curr_ret_stack--;
+                *parent = old;
+        }
+}
+
+#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
+
+
+void ftrace_function_trampoline(unsigned long parent,
+                                unsigned long self_addr,
+                                unsigned long org_sp_gr3)
+{
+        extern ftrace_func_t ftrace_trace_function;
+
+        if (function_trace_stop)
+                return;
+
+        if (ftrace_trace_function != ftrace_stub) {
+                ftrace_trace_function(parent, self_addr);
+                return;
+        }
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+        if (ftrace_graph_entry && ftrace_graph_return) {
+                unsigned long sp;
+                unsigned long *parent_rp;
+
+                asm volatile ("copy %%r30, %0" : "=r"(sp));
+                /* sanity check: is stack pointer which we got from
+                   assembler function in entry.S in a reasonable
+                   range compared to current stack pointer? */
+                if ((sp - org_sp_gr3) > 0x400)
+                        return;
+
+                /* calculate pointer to %rp in stack */
+                parent_rp = (unsigned long *) org_sp_gr3 - 0x10;
+                /* sanity check: parent_rp should hold parent */
+                if (*parent_rp != parent)
+                        return;
+                
+                prepare_ftrace_return(parent_rp, self_addr);
+                return;
+        }
+#endif
+}
+
diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c
index 103752a8fb94..4ea4229d765c 100644
--- a/arch/parisc/kernel/irq.c
+++ b/arch/parisc/kernel/irq.c
@@ -138,7 +138,7 @@ static void cpu_set_affinity_irq(unsigned int irq, const struct cpumask *dest)
         if (cpu_dest < 0)
                 return;
 
-        cpumask_copy(&irq_desc[irq].affinity, &cpumask_of_cpu(cpu_dest));
+        cpumask_copy(&irq_desc[irq].affinity, dest);
 }
 #endif
 
@@ -185,7 +185,7 @@ int show_interrupts(struct seq_file *p, void *v)
                 seq_printf(p, "%3d: ", i);
 #ifdef CONFIG_SMP
                 for_each_online_cpu(j)
-                        seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
+                        seq_printf(p, "%10u ", kstat_irqs_cpu(i, j));
 #else
                 seq_printf(p, "%10u ", kstat_irqs(i));
 #endif
diff --git a/arch/parisc/kernel/parisc_ksyms.c b/arch/parisc/kernel/parisc_ksyms.c
index 0eecfbbc59cd..df653663d3db 100644
--- a/arch/parisc/kernel/parisc_ksyms.c
+++ b/arch/parisc/kernel/parisc_ksyms.c
@@ -153,5 +153,10 @@ EXPORT_SYMBOL(node_data);
 EXPORT_SYMBOL(pfnnid_map);
 #endif
 
+#ifdef CONFIG_FUNCTION_TRACER
+extern void _mcount(void);
+EXPORT_SYMBOL(_mcount);
+#endif
+
 /* from pacache.S -- needed for copy_page */
 EXPORT_SYMBOL(copy_user_page_asm);
diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c
index b80e02a4d81d..ad585fd7748e 100644
--- a/arch/parisc/kernel/process.c
+++ b/arch/parisc/kernel/process.c
@@ -231,8 +231,8 @@ sys_clone(unsigned long clone_flags, unsigned long usp,
            
            However, these last 3 args are only examined
            if the proper flags are set. */
-        int __user *child_tidptr;
-        int __user *parent_tidptr;
+        int __user *parent_tidptr = (int __user *)regs->gr[24];
+        int __user *child_tidptr  = (int __user *)regs->gr[22];
 
         /* usp must be word aligned.  This also prevents users from
          * passing in the value 1 (which is the signal for a special
@@ -243,16 +243,6 @@ sys_clone(unsigned long clone_flags, unsigned long usp,
         if (usp == 0)
           usp = regs->gr[30];
 
-        if (clone_flags & CLONE_PARENT_SETTID)
-          parent_tidptr = (int __user *)regs->gr[24];
-        else
-          parent_tidptr = NULL;
-        
-        if (clone_flags & (CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID))
-          child_tidptr = (int __user *)regs->gr[22];
-        else
-          child_tidptr = NULL;
-
         return do_fork(clone_flags, usp, regs, 0, parent_tidptr, child_tidptr);
 }
 
diff --git a/arch/parisc/kernel/processor.c b/arch/parisc/kernel/processor.c
index bdbabfb87347..e09d0f7fb6b0 100644
--- a/arch/parisc/kernel/processor.c
+++ b/arch/parisc/kernel/processor.c
@@ -364,6 +364,13 @@ show_cpuinfo (struct seq_file *m, void *v)
                                  boot_cpu_data.cpu_hz / 1000000,
                                  boot_cpu_data.cpu_hz % 1000000  );
 
+                seq_printf(m, "capabilities\t:");
+                if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS32)
+                        seq_printf(m, " os32");
+                if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS64)
+                        seq_printf(m, " os64");
+                seq_printf(m, "\n");
+
                 seq_printf(m, "model\t\t: %s\n"
                                 "model name\t: %s\n",
                                  boot_cpu_data.pdc.sys_model_name,
diff --git a/arch/parisc/kernel/smp.c b/arch/parisc/kernel/smp.c
index 869197992f97..1fd0f0cec037 100644
--- a/arch/parisc/kernel/smp.c
+++ b/arch/parisc/kernel/smp.c
@@ -31,6 +31,7 @@
 #include <linux/err.h>
 #include <linux/delay.h>
 #include <linux/bitops.h>
+#include <linux/ftrace.h>
 
 #include <asm/system.h>
 #include <asm/atomic.h>
@@ -120,7 +121,7 @@ halt_processor(void)
 }
 
 
-irqreturn_t
+irqreturn_t __irq_entry
 ipi_interrupt(int irq, void *dev_id) 
 {
         int this_cpu = smp_processor_id();
diff --git a/arch/parisc/kernel/stacktrace.c b/arch/parisc/kernel/stacktrace.c
new file mode 100644
index 000000000000..2fe914c5f533
--- /dev/null
+++ b/arch/parisc/kernel/stacktrace.c
@@ -0,0 +1,63 @@
+/*
+ * Stack trace management functions
+ *
+ *  Copyright (C) 2009 Helge Deller <deller@gmx.de>
+ *  based on arch/x86/kernel/stacktrace.c by Ingo Molnar <mingo@redhat.com>
+ *  and parisc unwind functions by Randolph Chung <tausq@debian.org>
+ *
+ *  TODO: Userspace stacktrace (CONFIG_USER_STACKTRACE_SUPPORT)
+ */
+#include <linux/module.h>
+#include <linux/stacktrace.h>
+
+#include <asm/unwind.h>
+
+static void dump_trace(struct task_struct *task, struct stack_trace *trace)
+{
+        struct unwind_frame_info info;
+
+        /* initialize unwind info */
+        if (task == current) {
+                unsigned long sp;
+                struct pt_regs r;
+HERE:
+                asm volatile ("copy %%r30, %0" : "=r"(sp));
+                memset(&r, 0, sizeof(struct pt_regs));
+                r.iaoq[0] = (unsigned long)&&HERE;
+                r.gr[2] = (unsigned long)__builtin_return_address(0);
+                r.gr[30] = sp;
+                unwind_frame_init(&info, task, &r);
+        } else {
+                unwind_frame_init_from_blocked_task(&info, task);
+        }
+
+        /* unwind stack and save entries in stack_trace struct */
+        trace->nr_entries = 0;
+        while (trace->nr_entries < trace->max_entries) {
+                if (unwind_once(&info) < 0 || info.ip == 0)
+                        break;
+
+                if (__kernel_text_address(info.ip))
+                        trace->entries[trace->nr_entries++] = info.ip;
+        }
+}
+
+
+/*
+ * Save stack-backtrace addresses into a stack_trace buffer.
+ */
+void save_stack_trace(struct stack_trace *trace)
+{
+        dump_trace(current, trace);
+        if (trace->nr_entries < trace->max_entries)
+                trace->entries[trace->nr_entries++] = ULONG_MAX;
+}
+EXPORT_SYMBOL_GPL(save_stack_trace);
+
+void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
+{
+        dump_trace(tsk, trace);
+        if (trace->nr_entries < trace->max_entries)
+                trace->entries[trace->nr_entries++] = ULONG_MAX;
+}
+EXPORT_SYMBOL_GPL(save_stack_trace_tsk);
diff --git a/arch/parisc/kernel/syscall.S b/arch/parisc/kernel/syscall.S
index 69b6eebc466e..59fc1a43ec3e 100644
--- a/arch/parisc/kernel/syscall.S
+++ b/arch/parisc/kernel/syscall.S
@@ -365,17 +365,51 @@ tracesys_sigexit:
 
 
         /*********************************************************
-                Light-weight-syscall code
+                32/64-bit Light-Weight-Syscall ABI
 
-                r20 - lws number
-                r26,r25,r24,r23,r22 - Input registers
-                r28 - Function return register
-                r21 - Error code.
+                * - Indicates a hint for userspace inline asm
+                implementations.
 
-                Scracth: Any of the above that aren't being
-                currently used, including r1. 
+                Syscall number (caller-saves)
+                - %r20
+                * In asm clobber.
 
-                Return pointer: r31 (Not usable)
+                Argument registers (caller-saves)
+                - %r26, %r25, %r24, %r23, %r22
+                * In asm input.
+
+                Return registers (caller-saves)
+                - %r28 (return), %r21 (errno)
+                * In asm output.
+
+                Caller-saves registers
+                - %r1, %r27, %r29
+                - %r2 (return pointer)
+                - %r31 (ble link register)
+                * In asm clobber.
+
+                Callee-saves registers
+                - %r3-%r18
+                - %r30 (stack pointer)
+                * Not in asm clobber.
+
+                If userspace is 32-bit:
+                Callee-saves registers
+                - %r19 (32-bit PIC register)
+
+                Differences from 32-bit calling convention:
+                - Syscall number in %r20
+                - Additional argument register %r22 (arg4)
+                - Callee-saves %r19.
+
+                If userspace is 64-bit:
+                Callee-saves registers
+                - %r27 (64-bit PIC register)
+
+                Differences from 64-bit calling convention:
+                - Syscall number in %r20
+                - Additional argument register %r22 (arg4)
+                - Callee-saves %r27.
 
                 Error codes returned by entry path:
 
@@ -473,7 +507,8 @@ lws_compare_and_swap64:
         b,n     lws_compare_and_swap
 #else
         /* If we are not a 64-bit kernel, then we don't
-         * implement having 64-bit input registers
+         * have 64-bit input registers, and calling
+         * the 64-bit LWS CAS returns ENOSYS.
          */
         b,n     lws_exit_nosys
 #endif
@@ -635,12 +670,15 @@ END(sys_call_table64)
         /*
                 All light-weight-syscall atomic operations 
                 will use this set of locks 
+
+                NOTE: The lws_lock_start symbol must be
+                at least 16-byte aligned for safe use
+                with ldcw.
         */
         .section .data
         .align  PAGE_SIZE
 ENTRY(lws_lock_start)
         /* lws locks */
-        .align 16
         .rept 16
         /* Keep locks aligned at 16-bytes */
         .word 1
diff --git a/arch/parisc/kernel/syscall_table.S b/arch/parisc/kernel/syscall_table.S
index 303d2b647e41..03b9a01bc16c 100644
--- a/arch/parisc/kernel/syscall_table.S
+++ b/arch/parisc/kernel/syscall_table.S
@@ -130,7 +130,7 @@
         ENTRY_OURS(newuname)
         ENTRY_SAME(umask)               /* 60 */
         ENTRY_SAME(chroot)
-        ENTRY_SAME(ustat)
+        ENTRY_COMP(ustat)
         ENTRY_SAME(dup2)
         ENTRY_SAME(getppid)
         ENTRY_SAME(getpgrp)             /* 65 */
diff --git a/arch/parisc/kernel/time.c b/arch/parisc/kernel/time.c
index 9d46c43a4152..badaad9ff139 100644
--- a/arch/parisc/kernel/time.c
+++ b/arch/parisc/kernel/time.c
@@ -24,6 +24,7 @@
 #include <linux/profile.h>
 #include <linux/clocksource.h>
 #include <linux/platform_device.h>
+#include <linux/ftrace.h>
 
 #include <asm/uaccess.h>
 #include <asm/io.h>
@@ -53,7 +54,7 @@ static unsigned long clocktick __read_mostly;	/* timer cycles per tick */
  * held off for an arbitrarily long period of time by interrupts being
  * disabled, so we may miss one or more ticks.
  */
-irqreturn_t timer_interrupt(int irq, void *dev_id)
+irqreturn_t __irq_entry timer_interrupt(int irq, void *dev_id)
 {
         unsigned long now;
         unsigned long next_tick;
diff --git a/arch/parisc/kernel/traps.c b/arch/parisc/kernel/traps.c
index ba658d2086f7..c32f5d6d778e 100644
--- a/arch/parisc/kernel/traps.c
+++ b/arch/parisc/kernel/traps.c
@@ -247,6 +247,8 @@ void die_if_kernel(char *str, struct pt_regs *regs, long err)
 
         oops_in_progress = 1;
 
+        oops_enter();
+
         /* Amuse the user in a SPARC fashion */
         if (err) printk(
 KERN_CRIT "      _______________________________ \n"
@@ -293,6 +295,7 @@ KERN_CRIT "                     ||     ||\n");
                 panic("Fatal exception");
         }
 
+        oops_exit();
         do_exit(SIGSEGV);
 }
 
@@ -494,7 +497,7 @@ void parisc_terminate(char *msg, struct pt_regs *regs, int code, unsigned long o
         panic(msg);
 }
 
-void handle_interruption(int code, struct pt_regs *regs)
+void notrace handle_interruption(int code, struct pt_regs *regs)
 {
         unsigned long fault_address = 0;
         unsigned long fault_space = 0;
diff --git a/arch/parisc/kernel/vmlinux.lds.S b/arch/parisc/kernel/vmlinux.lds.S
index 1a3b6ccd3620..fd2cc4fd2b65 100644
--- a/arch/parisc/kernel/vmlinux.lds.S
+++ b/arch/parisc/kernel/vmlinux.lds.S
@@ -54,6 +54,8 @@ SECTIONS
                 TEXT_TEXT
                 SCHED_TEXT
                 LOCK_TEXT
+                KPROBES_TEXT
+                IRQENTRY_TEXT
                 *(.text.do_softirq)
                 *(.text.sys_exit)
                 *(.text.do_sigaltstack)
diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c
index 9d704d9831d1..4356ceb1e366 100644
--- a/arch/parisc/mm/init.c
+++ b/arch/parisc/mm/init.c
@@ -456,6 +456,13 @@ void __init mem_init(void)
 {
         int codesize, reservedpages, datasize, initsize;
 
+        /* Do sanity checks on page table constants */
+        BUILD_BUG_ON(PTE_ENTRY_SIZE != sizeof(pte_t));
+        BUILD_BUG_ON(PMD_ENTRY_SIZE != sizeof(pmd_t));
+        BUILD_BUG_ON(PGD_ENTRY_SIZE != sizeof(pgd_t));
+        BUILD_BUG_ON(PAGE_SHIFT + BITS_PER_PTE + BITS_PER_PMD + BITS_PER_PGD
+                        > BITS_PER_LONG);
+
         high_memory = __va((max_pfn << PAGE_SHIFT));
 
 #ifndef CONFIG_DISCONTIGMEM