Update to 3.4-final.

[linux-flexiantxendom0-3.2.10.git] / mm / filemap_xip.c

diff --git a/mm/filemap_xip.c b/mm/filemap_xip.c
index 83364df..a4eb311 100644 (file)
--- a/mm/filemap_xip.c
+++ b/mm/filemap_xip.c
@@ -10,7 +10,7 @@
 
 #include <linux/fs.h>
 #include <linux/pagemap.h>
-#include <linux/module.h>
+#include <linux/export.h>
 #include <linux/uio.h>
 #include <linux/rmap.h>
 #include <linux/mmu_notifier.h>
@@ -183,7 +183,7 @@ __xip_unmap (struct address_space * mapping,
                return;
 
 retry:
-       spin_lock(&mapping->i_mmap_lock);
+       mutex_lock(&mapping->i_mmap_mutex);
        vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, pgoff, pgoff) {
                mm = vma->vm_mm;
                address = vma->vm_start +
@@ -201,7 +201,7 @@ retry:
                        page_cache_release(page);
                }
        }
-       spin_unlock(&mapping->i_mmap_lock);
+       mutex_unlock(&mapping->i_mmap_mutex);
 
        if (locked) {
                mutex_unlock(&xip_sparse_mutex);
@@ -263,7 +263,12 @@ found:
                                                        xip_pfn);
                if (err == -ENOMEM)
                        return VM_FAULT_OOM;
-               BUG_ON(err);
+               /*
+                * err == -EBUSY is fine, we've raced against another thread
+                * that faulted-in the same page
+                */
+               if (err != -EBUSY)
+                       BUG_ON(err);
                return VM_FAULT_NOPAGE;
        } else {
                int err, ret = VM_FAULT_OOM;