[POWERPC] spufs: move fault, lscsa_alloc and switch code to spufs module

Currently, part of the spufs code (switch.o, lscsa_alloc.o and fault.o)
is compiled directly into the kernel.

This change moves these components of spufs into the kernel.

The lscsa and switch objects are fairly straightforward to move in.

For the fault.o module, we split the fault-handling code into two
parts: a/p/p/c/spu_fault.c and a/p/p/c/spufs/fault.c. The former is for
the in-kernel spu_handle_mm_fault function, and we move the rest of the
fault-handling code into spufs.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 0 insertions, 71 deletions

diff --git a/arch/powerpc/platforms/cell/spufs/fault.c b/arch/powerpc/platforms/cell/spufs/fault.c
index 917eab4be48..0635f292ae1 100644
--- a/arch/powerpc/platforms/cell/spufs/fault.c
+++ b/arch/powerpc/platforms/cell/spufs/fault.c
@@ -28,75 +28,6 @@
 
 #include "spufs.h"
 
-/*
- * This ought to be kept in sync with the powerpc specific do_page_fault
- * function. Currently, there are a few corner cases that we haven't had
- * to handle fortunately.
- */
-static int spu_handle_mm_fault(struct mm_struct *mm, unsigned long ea,
-                unsigned long dsisr, unsigned *flt)
-{
-        struct vm_area_struct *vma;
-        unsigned long is_write;
-        int ret;
-
-#if 0
-        if (!IS_VALID_EA(ea)) {
-                return -EFAULT;
-        }
-#endif /* XXX */
-        if (mm == NULL) {
-                return -EFAULT;
-        }
-        if (mm->pgd == NULL) {
-                return -EFAULT;
-        }
-
-        down_read(&mm->mmap_sem);
-        vma = find_vma(mm, ea);
-        if (!vma)
-                goto bad_area;
-        if (vma->vm_start <= ea)
-                goto good_area;
-        if (!(vma->vm_flags & VM_GROWSDOWN))
-                goto bad_area;
-        if (expand_stack(vma, ea))
-                goto bad_area;
-good_area:
-        is_write = dsisr & MFC_DSISR_ACCESS_PUT;
-        if (is_write) {
-                if (!(vma->vm_flags & VM_WRITE))
-                        goto bad_area;
-        } else {
-                if (dsisr & MFC_DSISR_ACCESS_DENIED)
-                        goto bad_area;
-                if (!(vma->vm_flags & (VM_READ | VM_EXEC)))
-                        goto bad_area;
-        }
-        ret = 0;
-        *flt = handle_mm_fault(mm, vma, ea, is_write);
-        if (unlikely(*flt & VM_FAULT_ERROR)) {
-                if (*flt & VM_FAULT_OOM) {
-                        ret = -ENOMEM;
-                        goto bad_area;
-                } else if (*flt & VM_FAULT_SIGBUS) {
-                        ret = -EFAULT;
-                        goto bad_area;
-                }
-                BUG();
-        }
-        if (*flt & VM_FAULT_MAJOR)
-                current->maj_flt++;
-        else
-                current->min_flt++;
-        up_read(&mm->mmap_sem);
-        return ret;
-
-bad_area:
-        up_read(&mm->mmap_sem);
-        return -EFAULT;
-}
-
 static void spufs_handle_dma_error(struct spu_context *ctx,
                                 unsigned long ea, int type)
 {
@@ -138,7 +69,6 @@ void spufs_dma_callback(struct spu *spu, int type)
 {
         spufs_handle_dma_error(spu->ctx, spu->dar, type);
 }
-EXPORT_SYMBOL_GPL(spufs_dma_callback);
 
 /*
  * bottom half handler for page faults, we can't do this from
@@ -227,4 +157,3 @@ int spufs_handle_class1(struct spu_context *ctx)
         spuctx_switch_state(ctx, SPU_UTIL_SYSTEM);
         return ret;
 }
-EXPORT_SYMBOL_GPL(spufs_handle_class1);