X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=drivers%2Fchar%2Fmspec.c;h=fe2a95b5d3c05e36121110de446e7309098d3f6b;hb=2e83fc4df5f27dfc1b53044c4f142b2f9d1db08c;hp=049a46cc9f87612b157d2abbe0aedd568d3e3372;hpb=6110e02b97377a2903853faf3ecaff0e742fbe93;p=mv-sheeva.git

diff --git a/drivers/char/mspec.c b/drivers/char/mspec.c
index 049a46cc9f8..fe2a95b5d3c 100644
--- a/drivers/char/mspec.c
+++ b/drivers/char/mspec.c
@@ -155,23 +155,22 @@ mspec_open(struct vm_area_struct *vma)
  * mspec_close
  *
  * Called when unmapping a device mapping. Frees all mspec pages
- * belonging to the vma.
+ * belonging to all the vma's sharing this vma_data structure.
  */
 static void
 mspec_close(struct vm_area_struct *vma)
 {
 	struct vma_data *vdata;
-	int index, last_index, result;
+	int index, last_index;
 	unsigned long my_page;
 
 	vdata = vma->vm_private_data;
 
-	BUG_ON(vma->vm_start < vdata->vm_start || vma->vm_end > vdata->vm_end);
+	if (!atomic_dec_and_test(&vdata->refcnt))
+		return;
 
-	spin_lock(&vdata->lock);
-	index = (vma->vm_start - vdata->vm_start) >> PAGE_SHIFT;
-	last_index = (vma->vm_end - vdata->vm_start) >> PAGE_SHIFT;
-	for (; index < last_index; index++) {
+	last_index = (vdata->vm_end - vdata->vm_start) >> PAGE_SHIFT;
+	for (index = 0; index < last_index; index++) {
 		if (vdata->maddr[index] == 0)
 			continue;
 		/*
@@ -180,20 +179,12 @@ mspec_close(struct vm_area_struct *vma)
 		 */
 		my_page = vdata->maddr[index];
 		vdata->maddr[index] = 0;
-		spin_unlock(&vdata->lock);
-		result = mspec_zero_block(my_page, PAGE_SIZE);
-		if (!result)
-			uncached_free_page(my_page);
+		if (!mspec_zero_block(my_page, PAGE_SIZE))
+			uncached_free_page(my_page, 1);
 		else
 			printk(KERN_WARNING "mspec_close(): "
-			       "failed to zero page %i\n",
-			       result);
-		spin_lock(&vdata->lock);
+			       "failed to zero page %ld\n", my_page);
 	}
-	spin_unlock(&vdata->lock);
-
-	if (!atomic_dec_and_test(&vdata->refcnt))
-		return;
 
 	if (vdata->flags & VMD_VMALLOCED)
 		vfree(vdata);
@@ -201,7 +192,6 @@ mspec_close(struct vm_area_struct *vma)
 		kfree(vdata);
 }
 
-
 /*
  * mspec_nopfn
  *
@@ -219,7 +209,7 @@ mspec_nopfn(struct vm_area_struct *vma, unsigned long address)
 	index = (address - vdata->vm_start) >> PAGE_SHIFT;
 	maddr = (volatile unsigned long) vdata->maddr[index];
 	if (maddr == 0) {
-		maddr = uncached_alloc_page(numa_node_id());
+		maddr = uncached_alloc_page(numa_node_id(), 1);
 		if (maddr == 0)
 			return NOPFN_OOM;
 
@@ -228,7 +218,7 @@ mspec_nopfn(struct vm_area_struct *vma, unsigned long address)
 			vdata->count++;
 			vdata->maddr[index] = maddr;
 		} else {
-			uncached_free_page(maddr);
+			uncached_free_page(maddr, 1);
 			maddr = vdata->maddr[index];
 		}
 		spin_unlock(&vdata->lock);
@@ -293,7 +283,7 @@ mspec_mmap(struct file *file, struct vm_area_struct *vma,
 	vdata->refcnt = ATOMIC_INIT(1);
 	vma->vm_private_data = vdata;
 
-	vma->vm_flags |= (VM_IO | VM_RESERVED | VM_PFNMAP);
+	vma->vm_flags |= (VM_IO | VM_RESERVED | VM_PFNMAP | VM_DONTEXPAND);
 	if (vdata->type == MSPEC_FETCHOP || vdata->type == MSPEC_UNCACHED)
 		vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 	vma->vm_ops = &mspec_vm_ops;
@@ -372,12 +362,12 @@ mspec_init(void)
 		is_sn2 = 1;
 		if (is_shub2()) {
 			ret = -ENOMEM;
-			for_each_online_node(nid) {
+			for_each_node_state(nid, N_ONLINE) {
 				int actual_nid;
 				int nasid;
 				unsigned long phys;
 
-				scratch_page[nid] = uncached_alloc_page(nid);
+				scratch_page[nid] = uncached_alloc_page(nid, 1);
 				if (scratch_page[nid] == 0)
 					goto free_scratch_pages;
 				phys = __pa(scratch_page[nid]);
@@ -424,7 +414,7 @@ mspec_init(void)
  free_scratch_pages:
 	for_each_node(nid) {
 		if (scratch_page[nid] != 0)
-			uncached_free_page(scratch_page[nid]);
+			uncached_free_page(scratch_page[nid], 1);
 	}
 	return ret;
 }
@@ -441,7 +431,7 @@ mspec_exit(void)
 
 		for_each_node(nid) {
 			if (scratch_page[nid] != 0)
-				uncached_free_page(scratch_page[nid]);
+				uncached_free_page(scratch_page[nid], 1);
 		}
 	}
 }