12 files changed, 79 insertions, 36 deletions

diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 65adc86a230..e077b0bf56c 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -15,6 +15,7 @@ config PARISC
         select HAVE_GENERIC_HARDIRQS
         select GENERIC_IRQ_PROBE
         select IRQ_PER_CPU
+        select ARCH_HAVE_NMI_SAFE_CMPXCHG
 
         help
           The PA-RISC microprocessor is designed by Hewlett-Packard and used
diff --git a/arch/parisc/include/asm/atomic.h b/arch/parisc/include/asm/atomic.h
index f81955934ae..4054b31e0fa 100644
--- a/arch/parisc/include/asm/atomic.h
+++ b/arch/parisc/include/asm/atomic.h
@@ -197,15 +197,15 @@ static __inline__ int atomic_read(const atomic_t *v)
 #define atomic_xchg(v, new) (xchg(&((v)->counter), new))
 
 /**
- * atomic_add_unless - add unless the number is a given value
+ * __atomic_add_unless - add unless the number is a given value
  * @v: pointer of type atomic_t
  * @a: the amount to add to v...
  * @u: ...unless v is equal to u.
  *
  * Atomically adds @a to @v, so long as it was not @u.
- * Returns non-zero if @v was not @u, and zero otherwise.
+ * Returns the old value of @v.
  */
-static __inline__ int atomic_add_unless(atomic_t *v, int a, int u)
+static __inline__ int __atomic_add_unless(atomic_t *v, int a, int u)
 {
         int c, old;
         c = atomic_read(v);
@@ -217,10 +217,9 @@ static __inline__ int atomic_add_unless(atomic_t *v, int a, int u)
                         break;
                 c = old;
         }
-        return c != (u);
+        return c;
 }
 
-#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
 
 #define atomic_add(i,v) ((void)(__atomic_add_return( (i),(v))))
 #define atomic_sub(i,v) ((void)(__atomic_add_return(-(i),(v))))
@@ -259,10 +258,10 @@ static __inline__ int atomic_add_unless(atomic_t *v, int a, int u)
 
 #define ATOMIC64_INIT(i) ((atomic64_t) { (i) })
 
-static __inline__ int
+static __inline__ s64
 __atomic64_add_return(s64 i, atomic64_t *v)
 {
-        int ret;
+        s64 ret;
         unsigned long flags;
         _atomic_spin_lock_irqsave(v, flags);
 
@@ -317,7 +316,7 @@ atomic64_read(const atomic64_t *v)
  * @u: ...unless v is equal to u.
  *
  * Atomically adds @a to @v, so long as it was not @u.
- * Returns non-zero if @v was not @u, and zero otherwise.
+ * Returns the old value of @v.
  */
 static __inline__ int atomic64_add_unless(atomic64_t *v, long a, long u)
 {
@@ -336,12 +335,7 @@ static __inline__ int atomic64_add_unless(atomic64_t *v, long a, long u)
 
 #define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0)
 
-#else /* CONFIG_64BIT */
-
-#include <asm-generic/atomic64.h>
-
 #endif /* !CONFIG_64BIT */
 
-#include <asm-generic/atomic-long.h>
 
 #endif /* _ASM_PARISC_ATOMIC_H_ */
diff --git a/arch/parisc/include/asm/bitops.h b/arch/parisc/include/asm/bitops.h
index 43c516fa17f..8c9b631d2a7 100644
--- a/arch/parisc/include/asm/bitops.h
+++ b/arch/parisc/include/asm/bitops.h
@@ -8,7 +8,7 @@
 #include <linux/compiler.h>
 #include <asm/types.h>          /* for BITS_PER_LONG/SHIFT_PER_LONG */
 #include <asm/byteorder.h>
-#include <asm/atomic.h>
+#include <linux/atomic.h>
 
 /*
  * HP-PARISC specific bit operations
@@ -223,14 +223,7 @@ static __inline__ int fls(int x)
 #ifdef __KERNEL__
 
 #include <asm-generic/bitops/le.h>
-
-/* '3' is bits per byte */
-#define LE_BYTE_ADDR ((sizeof(unsigned long) - 1) << 3)
-
-#define ext2_set_bit_atomic(l,nr,addr) \
-                test_and_set_bit((nr)   ^ LE_BYTE_ADDR, (unsigned long *)addr)
-#define ext2_clear_bit_atomic(l,nr,addr) \
-                test_and_clear_bit( (nr) ^ LE_BYTE_ADDR, (unsigned long *)addr)
+#include <asm-generic/bitops/ext2-atomic-setbit.h>
 
 #endif  /* __KERNEL__ */
 
diff --git a/arch/parisc/include/asm/futex.h b/arch/parisc/include/asm/futex.h
index 67a33cc27ef..2388bdb3283 100644
--- a/arch/parisc/include/asm/futex.h
+++ b/arch/parisc/include/asm/futex.h
@@ -5,11 +5,14 @@
 
 #include <linux/futex.h>
 #include <linux/uaccess.h>
+#include <asm/atomic.h>
 #include <asm/errno.h>
 
 static inline int
 futex_atomic_op_inuser (int encoded_op, u32 __user *uaddr)
 {
+        unsigned long int flags;
+        u32 val;
         int op = (encoded_op >> 28) & 7;
         int cmp = (encoded_op >> 24) & 15;
         int oparg = (encoded_op << 8) >> 20;
@@ -18,21 +21,58 @@ futex_atomic_op_inuser (int encoded_op, u32 __user *uaddr)
         if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
                 oparg = 1 << oparg;
 
-        if (! access_ok (VERIFY_WRITE, uaddr, sizeof(u32)))
+        if (!access_ok(VERIFY_WRITE, uaddr, sizeof(*uaddr)))
                 return -EFAULT;
 
         pagefault_disable();
 
+        _atomic_spin_lock_irqsave(uaddr, flags);
+
         switch (op) {
         case FUTEX_OP_SET:
+                /* *(int *)UADDR2 = OPARG; */
+                ret = get_user(oldval, uaddr);
+                if (!ret)
+                        ret = put_user(oparg, uaddr);
+                break;
         case FUTEX_OP_ADD:
+                /* *(int *)UADDR2 += OPARG; */
+                ret = get_user(oldval, uaddr);
+                if (!ret) {
+                        val = oldval + oparg;
+                        ret = put_user(val, uaddr);
+                }
+                break;
         case FUTEX_OP_OR:
+                /* *(int *)UADDR2 |= OPARG; */
+                ret = get_user(oldval, uaddr);
+                if (!ret) {
+                        val = oldval | oparg;
+                        ret = put_user(val, uaddr);
+                }
+                break;
         case FUTEX_OP_ANDN:
+                /* *(int *)UADDR2 &= ~OPARG; */
+                ret = get_user(oldval, uaddr);
+                if (!ret) {
+                        val = oldval & ~oparg;
+                        ret = put_user(val, uaddr);
+                }
+                break;
         case FUTEX_OP_XOR:
+                /* *(int *)UADDR2 ^= OPARG; */
+                ret = get_user(oldval, uaddr);
+                if (!ret) {
+                        val = oldval ^ oparg;
+                        ret = put_user(val, uaddr);
+                }
+                break;
         default:
                 ret = -ENOSYS;
         }
 
+        _atomic_spin_unlock_irqrestore(uaddr, flags);
+
         pagefault_enable();
 
         if (!ret) {
@@ -54,7 +94,9 @@ static inline int
 futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
                               u32 oldval, u32 newval)
 {
+        int ret;
         u32 val;
+        unsigned long flags;
 
         /* futex.c wants to do a cmpxchg_inatomic on kernel NULL, which is
          * our gateway page, and causes no end of trouble...
@@ -65,12 +107,24 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
         if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32)))
                 return -EFAULT;
 
-        if (get_user(val, uaddr))
-                return -EFAULT;
-        if (val == oldval && put_user(newval, uaddr))
-                return -EFAULT;
+        /* HPPA has no cmpxchg in hardware and therefore the
+         * best we can do here is use an array of locks. The
+         * lock selected is based on a hash of the userspace
+         * address. This should scale to a couple of CPUs.
+         */
+
+        _atomic_spin_lock_irqsave(uaddr, flags);
+
+        ret = get_user(val, uaddr);
+
+        if (!ret && val == oldval)
+                ret = put_user(newval, uaddr);
+
         *uval = val;
-        return 0;
+
+        _atomic_spin_unlock_irqrestore(uaddr, flags);
+
+        return ret;
 }
 
 #endif /*__KERNEL__*/
diff --git a/arch/parisc/include/asm/mmu_context.h b/arch/parisc/include/asm/mmu_context.h
index 354b2aca990..59be2576443 100644
--- a/arch/parisc/include/asm/mmu_context.h
+++ b/arch/parisc/include/asm/mmu_context.h
@@ -3,7 +3,7 @@
 
 #include <linux/mm.h>
 #include <linux/sched.h>
-#include <asm/atomic.h>
+#include <linux/atomic.h>
 #include <asm/pgalloc.h>
 #include <asm/pgtable.h>
 #include <asm-generic/mm_hooks.h>
diff --git a/arch/parisc/include/asm/ptrace.h b/arch/parisc/include/asm/ptrace.h
index 7f09533da77..250ae35aa06 100644
--- a/arch/parisc/include/asm/ptrace.h
+++ b/arch/parisc/include/asm/ptrace.h
@@ -56,7 +56,6 @@ struct pt_regs {
 #define instruction_pointer(regs)       ((regs)->iaoq[0] & ~3)
 #define user_stack_pointer(regs)        ((regs)->gr[30])
 unsigned long profile_pc(struct pt_regs *);
-extern void show_regs(struct pt_regs *);
 
 
 #endif /* __KERNEL__ */
diff --git a/arch/parisc/include/asm/unistd.h b/arch/parisc/include/asm/unistd.h
index 3392de3e7be..d61de64f990 100644
--- a/arch/parisc/include/asm/unistd.h
+++ b/arch/parisc/include/asm/unistd.h
@@ -821,8 +821,9 @@
 #define __NR_open_by_handle_at  (__NR_Linux + 326)
 #define __NR_syncfs             (__NR_Linux + 327)
 #define __NR_setns              (__NR_Linux + 328)
+#define __NR_sendmmsg           (__NR_Linux + 329)
 
-#define __NR_Linux_syscalls     (__NR_setns + 1)
+#define __NR_Linux_syscalls     (__NR_sendmmsg + 1)
 
 
 #define __IGNORE_select         /* newselect */
diff --git a/arch/parisc/kernel/parisc_ksyms.c b/arch/parisc/kernel/parisc_ksyms.c
index df653663d3d..a7bb757a549 100644
--- a/arch/parisc/kernel/parisc_ksyms.c
+++ b/arch/parisc/kernel/parisc_ksyms.c
@@ -31,7 +31,7 @@
 #include <linux/string.h>
 EXPORT_SYMBOL(memset);
 
-#include <asm/atomic.h>
+#include <linux/atomic.h>
 EXPORT_SYMBOL(__xchg8);
 EXPORT_SYMBOL(__xchg32);
 EXPORT_SYMBOL(__cmpxchg_u32);
diff --git a/arch/parisc/kernel/smp.c b/arch/parisc/kernel/smp.c
index 828305f19cf..32d588488f0 100644
--- a/arch/parisc/kernel/smp.c
+++ b/arch/parisc/kernel/smp.c
@@ -33,7 +33,7 @@
 #include <linux/ftrace.h>
 
 #include <asm/system.h>
-#include <asm/atomic.h>
+#include <linux/atomic.h>
 #include <asm/current.h>
 #include <asm/delay.h>
 #include <asm/tlbflush.h>
diff --git a/arch/parisc/kernel/syscall_table.S b/arch/parisc/kernel/syscall_table.S
index 34a4f5a2fff..3735abd7f8f 100644
--- a/arch/parisc/kernel/syscall_table.S
+++ b/arch/parisc/kernel/syscall_table.S
@@ -259,7 +259,7 @@
         ENTRY_SAME(ni_syscall)          /* query_module */
         ENTRY_SAME(poll)
         /* structs contain pointers and an in_addr... */
-        ENTRY_COMP(nfsservctl)
+        ENTRY_SAME(ni_syscall)          /* was nfsservctl */
         ENTRY_SAME(setresgid)           /* 170 */
         ENTRY_SAME(getresgid)
         ENTRY_SAME(prctl)
@@ -427,6 +427,7 @@
         ENTRY_COMP(open_by_handle_at)
         ENTRY_SAME(syncfs)
         ENTRY_SAME(setns)
+        ENTRY_COMP(sendmmsg)
 
         /* Nothing yet */
 
diff --git a/arch/parisc/kernel/traps.c b/arch/parisc/kernel/traps.c
index 8b58bf0b7d5..f19e6604026 100644
--- a/arch/parisc/kernel/traps.c
+++ b/arch/parisc/kernel/traps.c
@@ -33,7 +33,7 @@
 #include <asm/irq.h>
 #include <asm/traps.h>
 #include <asm/unaligned.h>
-#include <asm/atomic.h>
+#include <linux/atomic.h>
 #include <asm/smp.h>
 #include <asm/pdc.h>
 #include <asm/pdc_chassis.h>
diff --git a/arch/parisc/lib/bitops.c b/arch/parisc/lib/bitops.c
index 353963d4205..a8bffd8af77 100644
--- a/arch/parisc/lib/bitops.c
+++ b/arch/parisc/lib/bitops.c
@@ -9,7 +9,7 @@
 #include <linux/kernel.h>
 #include <linux/spinlock.h>
 #include <asm/system.h>
-#include <asm/atomic.h>
+#include <linux/atomic.h>
 
 #ifdef CONFIG_SMP
 arch_spinlock_t __atomic_hash[ATOMIC_HASH_SIZE] __lock_aligned = {