12 files changed, 62 insertions, 71 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index b645a3d5fd30..fd3a495a0005 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6084,6 +6084,7 @@ L:	linux-parisc@vger.kernel.org
 W:      http://www.parisc-linux.org/
 Q:      http://patchwork.kernel.org/project/linux-parisc/list/
 T:      git git://git.kernel.org/pub/scm/linux/kernel/git/jejb/parisc-2.6.git
+T:      git git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux.git
 S:      Maintained
 F:      arch/parisc/
 F:      drivers/parisc/
diff --git a/arch/parisc/include/asm/assembly.h b/arch/parisc/include/asm/assembly.h
index 89fb40005e3f..0da848232344 100644
--- a/arch/parisc/include/asm/assembly.h
+++ b/arch/parisc/include/asm/assembly.h
@@ -438,7 +438,6 @@
         SAVE_SP  (%sr4, PT_SR4 (\regs))
         SAVE_SP  (%sr5, PT_SR5 (\regs))
         SAVE_SP  (%sr6, PT_SR6 (\regs))
-        SAVE_SP  (%sr7, PT_SR7 (\regs))
 
         SAVE_CR  (%cr17, PT_IASQ0(\regs))
         mtctl    %r0,   %cr17
diff --git a/arch/parisc/include/asm/hardirq.h b/arch/parisc/include/asm/hardirq.h
index c19f7138ba48..241c34518465 100644
--- a/arch/parisc/include/asm/hardirq.h
+++ b/arch/parisc/include/asm/hardirq.h
@@ -17,17 +17,14 @@
 
 typedef struct {
         unsigned int __softirq_pending;
-#ifdef CONFIG_DEBUG_STACKOVERFLOW
         unsigned int kernel_stack_usage;
-#ifdef CONFIG_IRQSTACKS
         unsigned int irq_stack_usage;
-        unsigned int irq_stack_counter;
-#endif
-#endif
 #ifdef CONFIG_SMP
         unsigned int irq_resched_count;
         unsigned int irq_call_count;
 #endif
+        unsigned int irq_unaligned_count;
+        unsigned int irq_fpassist_count;
         unsigned int irq_tlb_count;
 } ____cacheline_aligned irq_cpustat_t;
 
diff --git a/arch/parisc/include/asm/processor.h b/arch/parisc/include/asm/processor.h
index cfbc43929cf6..cc2290a3cace 100644
--- a/arch/parisc/include/asm/processor.h
+++ b/arch/parisc/include/asm/processor.h
@@ -17,7 +17,6 @@
 #include <asm/ptrace.h>
 #include <asm/types.h>
 #include <asm/percpu.h>
-
 #endif /* __ASSEMBLY__ */
 
 /*
@@ -59,26 +58,6 @@
 #ifndef __ASSEMBLY__
 
 /*
- * IRQ STACK - used for irq handler
- */
-#ifdef __KERNEL__
-
-#include <linux/spinlock_types.h>
-
-#define IRQ_STACK_SIZE      (4096 << 2) /* 16k irq stack size */
-
-union irq_stack_union {
-        unsigned long stack[IRQ_STACK_SIZE/sizeof(unsigned long)];
-        raw_spinlock_t lock;
-};
-
-DECLARE_PER_CPU(union irq_stack_union, irq_stack_union);
-
-void call_on_stack(unsigned long p1, void *func, unsigned long new_stack);
-
-#endif /* __KERNEL__ */
-
-/*
  * Data detected about CPUs at boot time which is the same for all CPU's.
  * HP boxes are SMP - ie identical processors.
  *
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
index ae27cb6ce19a..e8f07dd28401 100644
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -65,15 +65,11 @@
         rsm     PSW_SM_I, %r0   /* barrier for "Relied upon Translation */
         mtsp    %r0, %sr4
         mtsp    %r0, %sr5
-        mfsp    %sr7, %r1
-        or,=    %r0,%r1,%r0     /* Only save sr7 in sr3 if sr7 != 0 */
-        mtsp    %r1, %sr3
+        mtsp    %r0, %sr6
         tovirt_r1 %r29
         load32  KERNEL_PSW, %r1
 
         rsm     PSW_SM_QUIET,%r0        /* second "heavy weight" ctl op */
-        mtsp    %r0, %sr6
-        mtsp    %r0, %sr7
         mtctl   %r0, %cr17      /* Clear IIASQ tail */
         mtctl   %r0, %cr17      /* Clear IIASQ head */
         mtctl   %r1, %ipsw
@@ -119,17 +115,20 @@
 
         /* we save the registers in the task struct */
 
+        copy    %r30, %r17
         mfctl   %cr30, %r1
+        ldo     THREAD_SZ_ALGN(%r1), %r30
+        mtsp    %r0,%sr7
+        mtsp    %r16,%sr3
         tophys  %r1,%r9
         LDREG   TI_TASK(%r9), %r1       /* thread_info -> task_struct */
         tophys  %r1,%r9
         ldo     TASK_REGS(%r9),%r9
-        STREG   %r30, PT_GR30(%r9)
+        STREG   %r17,PT_GR30(%r9)
         STREG   %r29,PT_GR29(%r9)
         STREG   %r26,PT_GR26(%r9)
+        STREG   %r16,PT_SR7(%r9)
         copy    %r9,%r29
-        mfctl   %cr30, %r1
-        ldo     THREAD_SZ_ALGN(%r1), %r30
         .endm
 
         .macro  get_stack_use_r30
@@ -137,10 +136,12 @@
         /* we put a struct pt_regs on the stack and save the registers there */
 
         tophys  %r30,%r9
-        STREG   %r30,PT_GR30(%r9)
+        copy    %r30,%r1
         ldo     PT_SZ_ALGN(%r30),%r30
+        STREG   %r1,PT_GR30(%r9)
         STREG   %r29,PT_GR29(%r9)
         STREG   %r26,PT_GR26(%r9)
+        STREG   %r16,PT_SR7(%r9)
         copy    %r9,%r29
         .endm
 
diff --git a/arch/parisc/kernel/hardware.c b/arch/parisc/kernel/hardware.c
index f7752f6af29e..9e2d2e408529 100644
--- a/arch/parisc/kernel/hardware.c
+++ b/arch/parisc/kernel/hardware.c
@@ -222,6 +222,7 @@ static struct hp_hardware hp_hardware_list[] = {
         {HPHW_NPROC,0x5DD,0x4,0x81,"Duet W2"},
         {HPHW_NPROC,0x5DE,0x4,0x81,"Piccolo W+"},
         {HPHW_NPROC,0x5DF,0x4,0x81,"Cantata W2"},
+        {HPHW_NPROC,0x5DF,0x0,0x00,"Marcato W+? (rp5470)"},
         {HPHW_NPROC,0x5E0,0x4,0x91,"Cantata DC- W2"},
         {HPHW_NPROC,0x5E1,0x4,0x91,"Crescendo DC- W2"},
         {HPHW_NPROC,0x5E2,0x4,0x91,"Crescendo 650 W2"},
diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c
index 55237a70e197..2e6443b1e922 100644
--- a/arch/parisc/kernel/irq.c
+++ b/arch/parisc/kernel/irq.c
@@ -27,11 +27,11 @@
 #include <linux/interrupt.h>
 #include <linux/kernel_stat.h>
 #include <linux/seq_file.h>
-#include <linux/spinlock.h>
 #include <linux/types.h>
 #include <asm/io.h>
 
 #include <asm/smp.h>
+#include <asm/ldcw.h>
 
 #undef PARISC_IRQ_CR16_COUNTS
 
@@ -172,10 +172,6 @@ int arch_show_interrupts(struct seq_file *p, int prec)
         for_each_online_cpu(j)
                 seq_printf(p, "%10u ", irq_stats(j)->irq_stack_usage);
         seq_puts(p, "  Interrupt stack usage\n");
-        seq_printf(p, "%*s: ", prec, "ISC");
-        for_each_online_cpu(j)
-                seq_printf(p, "%10u ", irq_stats(j)->irq_stack_counter);
-        seq_puts(p, "  Interrupt stack usage counter\n");
 # endif
 #endif
 #ifdef CONFIG_SMP
@@ -188,6 +184,14 @@ int arch_show_interrupts(struct seq_file *p, int prec)
                 seq_printf(p, "%10u ", irq_stats(j)->irq_call_count);
         seq_puts(p, "  Function call interrupts\n");
 #endif
+        seq_printf(p, "%*s: ", prec, "UAH");
+        for_each_online_cpu(j)
+                seq_printf(p, "%10u ", irq_stats(j)->irq_unaligned_count);
+        seq_puts(p, "  Unaligned access handler traps\n");
+        seq_printf(p, "%*s: ", prec, "FPA");
+        for_each_online_cpu(j)
+                seq_printf(p, "%10u ", irq_stats(j)->irq_fpassist_count);
+        seq_puts(p, "  Floating point assist traps\n");
         seq_printf(p, "%*s: ", prec, "TLB");
         for_each_online_cpu(j)
                 seq_printf(p, "%10u ", irq_stats(j)->irq_tlb_count);
@@ -376,6 +380,24 @@ static inline int eirr_to_irq(unsigned long eirr)
         return (BITS_PER_LONG - bit) + TIMER_IRQ;
 }
 
+#ifdef CONFIG_IRQSTACKS
+/*
+ * IRQ STACK - used for irq handler
+ */
+#define IRQ_STACK_SIZE      (4096 << 2) /* 16k irq stack size */
+
+union irq_stack_union {
+        unsigned long stack[IRQ_STACK_SIZE/sizeof(unsigned long)];
+        volatile unsigned int slock[4];
+        volatile unsigned int lock[1];
+};
+
+DEFINE_PER_CPU(union irq_stack_union, irq_stack_union) = {
+                .slock = { 1,1,1,1 },
+        };
+#endif
+
+
 int sysctl_panic_on_stackoverflow = 1;
 
 static inline void stack_overflow_check(struct pt_regs *regs)
@@ -442,27 +464,26 @@ panic_check:
 }
 
 #ifdef CONFIG_IRQSTACKS
-DEFINE_PER_CPU(union irq_stack_union, irq_stack_union) = {
-                .lock = __RAW_SPIN_LOCK_UNLOCKED((irq_stack_union).lock)
-        };
+/* in entry.S: */
+void call_on_stack(unsigned long p1, void *func, unsigned long new_stack);
 
 static void execute_on_irq_stack(void *func, unsigned long param1)
 {
         union irq_stack_union *union_ptr;
         unsigned long irq_stack;
-        raw_spinlock_t *irq_stack_in_use;
+        volatile unsigned int *irq_stack_in_use;
 
         union_ptr = &per_cpu(irq_stack_union, smp_processor_id());
         irq_stack = (unsigned long) &union_ptr->stack;
-        irq_stack = ALIGN(irq_stack + sizeof(irq_stack_union.lock),
+        irq_stack = ALIGN(irq_stack + sizeof(irq_stack_union.slock),
                          64); /* align for stack frame usage */
 
         /* We may be called recursive. If we are already using the irq stack,
          * just continue to use it. Use spinlocks to serialize
          * the irq stack usage.
          */
-        irq_stack_in_use = &union_ptr->lock;
-        if (!raw_spin_trylock(irq_stack_in_use)) {
+        irq_stack_in_use = (volatile unsigned int *)__ldcw_align(union_ptr);
+        if (!__ldcw(irq_stack_in_use)) {
                 void (*direct_call)(unsigned long p1) = func;
 
                 /* We are using the IRQ stack already.
@@ -474,10 +495,8 @@ static void execute_on_irq_stack(void *func, unsigned long param1)
         /* This is where we switch to the IRQ stack. */
         call_on_stack(param1, func, irq_stack);
 
-        __inc_irq_stat(irq_stack_counter);
-
         /* free up irq stack usage. */
-        do_raw_spin_unlock(irq_stack_in_use);
+        *irq_stack_in_use = 1;
 }
 
 asmlinkage void do_softirq(void)
diff --git a/arch/parisc/kernel/pacache.S b/arch/parisc/kernel/pacache.S
index 5e1de6072be5..36d7f402e48e 100644
--- a/arch/parisc/kernel/pacache.S
+++ b/arch/parisc/kernel/pacache.S
@@ -605,14 +605,14 @@ ENTRY(copy_user_page_asm)
         convert_phys_for_tlb_insert20 %r26      /* convert phys addr to tlb insert format */
         convert_phys_for_tlb_insert20 %r23      /* convert phys addr to tlb insert format */
         depd            %r24,63,22, %r28        /* Form aliased virtual address 'to' */
-        depdi           0, 63,PAGE_SHIFT, %r28  /* Clear any offset bits */
+        depdi           0, 63,PAGE_SHIFT, %r28  /* Clear any offset bits */
         copy            %r28, %r29
         depdi           1, 41,1, %r29           /* Form aliased virtual address 'from' */
 #else
         extrw,u         %r26, 24,25, %r26       /* convert phys addr to tlb insert format */
         extrw,u         %r23, 24,25, %r23       /* convert phys addr to tlb insert format */
         depw            %r24, 31,22, %r28       /* Form aliased virtual address 'to' */
-        depwi           0, 31,12, %r28          /* Clear any offset bits */
+        depwi           0, 31,PAGE_SHIFT, %r28  /* Clear any offset bits */
         copy            %r28, %r29
         depwi           1, 9,1, %r29            /* Form aliased virtual address 'from' */
 #endif
@@ -762,7 +762,7 @@ ENTRY(clear_user_page_asm)
 #else
         extrw,u         %r26, 24,25, %r26       /* convert phys addr to tlb insert format */
         depw            %r25, 31,22, %r28       /* Form aliased virtual address 'to' */
-        depwi           0, 31,12, %r28          /* Clear any offset bits */
+        depwi           0, 31,PAGE_SHIFT, %r28  /* Clear any offset bits */
 #endif
 
         /* Purge any old translation */
@@ -846,7 +846,7 @@ ENTRY(flush_dcache_page_asm)
 #else
         extrw,u         %r26, 24,25, %r26       /* convert phys addr to tlb insert format */
         depw            %r25, 31,22, %r28       /* Form aliased virtual address 'to' */
-        depwi           0, 31,12, %r28          /* Clear any offset bits */
+        depwi           0, 31,PAGE_SHIFT, %r28  /* Clear any offset bits */
 #endif
 
         /* Purge any old translation */
@@ -918,11 +918,11 @@ ENTRY(flush_icache_page_asm)
 #endif
         convert_phys_for_tlb_insert20 %r26      /* convert phys addr to tlb insert format */
         depd            %r25, 63,22, %r28       /* Form aliased virtual address 'to' */
-        depdi           0, 63,PAGE_SHIFT, %r28  /* Clear any offset bits */
+        depdi           0, 63,PAGE_SHIFT, %r28  /* Clear any offset bits */
 #else
         extrw,u         %r26, 24,25, %r26       /* convert phys addr to tlb insert format */
         depw            %r25, 31,22, %r28       /* Form aliased virtual address 'to' */
-        depwi           0, 31,12, %r28          /* Clear any offset bits */
+        depwi           0, 31,PAGE_SHIFT, %r28  /* Clear any offset bits */
 #endif
 
         /* Purge any old translation */
diff --git a/arch/parisc/kernel/traps.c b/arch/parisc/kernel/traps.c
index fe41a98043bb..04e47c6a4562 100644
--- a/arch/parisc/kernel/traps.c
+++ b/arch/parisc/kernel/traps.c
@@ -646,6 +646,7 @@ void notrace handle_interruption(int code, struct pt_regs *regs)
         case 14:
                 /* Assist Exception Trap, i.e. floating point exception. */
                 die_if_kernel("Floating point exception", regs, 0); /* quiet */
+                __inc_irq_stat(irq_fpassist_count);
                 handle_fpe(regs);
                 return;
 
diff --git a/arch/parisc/kernel/unaligned.c b/arch/parisc/kernel/unaligned.c
index 234e3682cf09..d7c0acb35ec2 100644
--- a/arch/parisc/kernel/unaligned.c
+++ b/arch/parisc/kernel/unaligned.c
@@ -27,6 +27,7 @@
 #include <linux/signal.h>
 #include <linux/ratelimit.h>
 #include <asm/uaccess.h>
+#include <asm/hardirq.h>
 
 /* #define DEBUG_UNALIGNED 1 */
 
@@ -454,6 +455,8 @@ void handle_unaligned(struct pt_regs *regs)
         struct siginfo si;
         register int flop=0;    /* true if this is a flop */
 
+        __inc_irq_stat(irq_unaligned_count);
+
         /* log a message with pacing */
         if (user_mode(regs)) {
                 if (current->thread.flags & PARISC_UAC_SIGBUS) {
diff --git a/drivers/parisc/superio.c b/drivers/parisc/superio.c
index ac6e8e7a02df..a042d065a0c7 100644
--- a/drivers/parisc/superio.c
+++ b/drivers/parisc/superio.c
@@ -494,15 +494,4 @@ static struct pci_driver superio_driver = {
         .probe =        superio_probe,
 };
 
-static int __init superio_modinit(void)
-{
-        return pci_register_driver(&superio_driver);
-}
-
-static void __exit superio_exit(void)
-{
-        pci_unregister_driver(&superio_driver);
-}
-
-module_init(superio_modinit);
-module_exit(superio_exit);
+module_pci_driver(superio_driver);
diff --git a/lib/mpi/longlong.h b/lib/mpi/longlong.h
index 095ab157a521..d411355f238e 100644
--- a/lib/mpi/longlong.h
+++ b/lib/mpi/longlong.h
@@ -318,7 +318,8 @@ extern UDItype __udiv_qrnnd();
              "rM" ((USItype)(bh)), \
              "rM" ((USItype)(al)), \
              "rM" ((USItype)(bl)))
-#if defined(_PA_RISC1_1)
+#if 0 && defined(_PA_RISC1_1)
+/* xmpyu uses floating point register which is not allowed in Linux kernel. */
 #define umul_ppmm(wh, wl, u, v) \
 do { \
         union {UDItype __ll; \
@@ -337,7 +338,7 @@ do { \
 #define UMUL_TIME 40
 #define UDIV_TIME 80
 #endif
-#ifndef LONGLONG_STANDALONE
+#if 0 /* #ifndef LONGLONG_STANDALONE */
 #define udiv_qrnnd(q, r, n1, n0, d) \
 do { USItype __r; \
         (q) = __udiv_qrnnd(&__r, (n1), (n0), (d)); \