Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/parisc-2.6

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/parisc-2.6:
  [PARISC] wire up sendmmsg syscall
  [PARISC] fix return type of __atomic64_add_return
  [PARISC] Fix futex support

4 files changed, 65 insertions, 9 deletions

diff --git a/arch/parisc/include/asm/atomic.h b/arch/parisc/include/asm/atomic.h
index b1dc71f5534e..4054b31e0fa9 100644
--- a/arch/parisc/include/asm/atomic.h
+++ b/arch/parisc/include/asm/atomic.h
@@ -258,10 +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);
 
diff --git a/arch/parisc/include/asm/futex.h b/arch/parisc/include/asm/futex.h
index 67a33cc27ef2..2388bdb32832 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/unistd.h b/arch/parisc/include/asm/unistd.h
index 3392de3e7be0..d61de64f990a 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/syscall_table.S b/arch/parisc/kernel/syscall_table.S
index 34a4f5a2fffb..e66366fd2abc 100644
--- a/arch/parisc/kernel/syscall_table.S
+++ b/arch/parisc/kernel/syscall_table.S
@@ -427,6 +427,7 @@
         ENTRY_COMP(open_by_handle_at)
         ENTRY_SAME(syncfs)
         ENTRY_SAME(setns)
+        ENTRY_COMP(sendmmsg)
 
         /* Nothing yet */