m68knommu: NPTL support for uClinux

Port syscalls for NPTL support to m68knommu.

Signed-off-by: Maxim Kuvyrkov <maxim@codesourcery.com>
Acked-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

1 files changed, 36 insertions, 0 deletions

diff --git a/arch/m68knommu/kernel/sys_m68k.c b/arch/m68knommu/kernel/sys_m68k.c
index b67cbc735a9b..923dd4aab875 100644
--- a/arch/m68knommu/kernel/sys_m68k.c
+++ b/arch/m68knommu/kernel/sys_m68k.c
@@ -190,3 +190,39 @@ int kernel_execve(const char *filename, char *const argv[], char *const envp[])
                         : "d" (__a), "d" (__b), "d" (__c));
         return __res;
 }
+
+asmlinkage unsigned long sys_get_thread_area(void)
+{
+        return current_thread_info()->tp_value;
+}
+
+asmlinkage int sys_set_thread_area(unsigned long tp)
+{
+        current_thread_info()->tp_value = tp;
+        return 0;
+}
+
+/* This syscall gets its arguments in A0 (mem), D2 (oldval) and
+   D1 (newval).  */
+asmlinkage int
+sys_atomic_cmpxchg_32(unsigned long newval, int oldval, int d3, int d4, int d5,
+                      unsigned long __user * mem)
+{
+        struct mm_struct *mm = current->mm;
+        unsigned long mem_value;
+
+        down_read(&mm->mmap_sem);
+
+        mem_value = *mem;
+        if (mem_value == oldval)
+                *mem = newval;
+
+        up_read(&mm->mmap_sem);
+        return mem_value;
+}
+
+asmlinkage int sys_atomic_barrier(void)
+{
+        /* no code needed for uniprocs */
+        return 0;
+}