ALSA: usb-audio: add support for Akai MPD16

[safe/jmp/linux-2.6] / mm / truncate.c

diff --git a/mm/truncate.c b/mm/truncate.c
index 450cebd..f42675a 100644 (file)
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -9,6 +9,7 @@
 
 #include <linux/kernel.h>
 #include <linux/backing-dev.h>
+#include <linux/gfp.h>
 #include <linux/mm.h>
 #include <linux/swap.h>
 #include <linux/module.h>
@@ -272,6 +273,7 @@ void truncate_inode_pages_range(struct address_space *mapping,
                        pagevec_release(&pvec);
                        break;
                }
+               mem_cgroup_uncharge_start();
                for (i = 0; i < pagevec_count(&pvec); i++) {
                        struct page *page = pvec.pages[i];
 
@@ -286,6 +288,7 @@ void truncate_inode_pages_range(struct address_space *mapping,
                        unlock_page(page);
                }
                pagevec_release(&pvec);
+               mem_cgroup_uncharge_end();
        }
 }
 EXPORT_SYMBOL(truncate_inode_pages_range);
@@ -327,6 +330,7 @@ unsigned long invalidate_mapping_pages(struct address_space *mapping,
        pagevec_init(&pvec, 0);
        while (next <= end &&
                        pagevec_lookup(&pvec, mapping, next, PAGEVEC_SIZE)) {
+               mem_cgroup_uncharge_start();
                for (i = 0; i < pagevec_count(&pvec); i++) {
                        struct page *page = pvec.pages[i];
                        pgoff_t index;
@@ -354,6 +358,7 @@ unsigned long invalidate_mapping_pages(struct address_space *mapping,
                                break;
                }
                pagevec_release(&pvec);
+               mem_cgroup_uncharge_end();
                cond_resched();
        }
        return ret;
@@ -428,6 +433,7 @@ int invalidate_inode_pages2_range(struct address_space *mapping,
        while (next <= end && !wrapped &&
                pagevec_lookup(&pvec, mapping, next,
                        min(end - next, (pgoff_t)PAGEVEC_SIZE - 1) + 1)) {
+               mem_cgroup_uncharge_start();
                for (i = 0; i < pagevec_count(&pvec); i++) {
                        struct page *page = pvec.pages[i];
                        pgoff_t page_index;
@@ -477,6 +483,7 @@ int invalidate_inode_pages2_range(struct address_space *mapping,
                        unlock_page(page);
                }
                pagevec_release(&pvec);
+               mem_cgroup_uncharge_end();
                cond_resched();
        }
        return ret;
@@ -490,7 +497,7 @@ EXPORT_SYMBOL_GPL(invalidate_inode_pages2_range);
  * Any pages which are found to be mapped into pagetables are unmapped prior to
  * invalidation.
  *
- * Returns -EIO if any pages could not be invalidated.
+ * Returns -EBUSY if any pages could not be invalidated.
  */
 int invalidate_inode_pages2(struct address_space *mapping)
 {
@@ -516,22 +523,20 @@ EXPORT_SYMBOL_GPL(invalidate_inode_pages2);
  */
 void truncate_pagecache(struct inode *inode, loff_t old, loff_t new)
 {
-       if (new < old) {
-               struct address_space *mapping = inode->i_mapping;
-
-               /*
-                * unmap_mapping_range is called twice, first simply for
-                * efficiency so that truncate_inode_pages does fewer
-                * single-page unmaps.  However after this first call, and
-                * before truncate_inode_pages finishes, it is possible for
-                * private pages to be COWed, which remain after
-                * truncate_inode_pages finishes, hence the second
-                * unmap_mapping_range call must be made for correctness.
-                */
-               unmap_mapping_range(mapping, new + PAGE_SIZE - 1, 0, 1);
-               truncate_inode_pages(mapping, new);
-               unmap_mapping_range(mapping, new + PAGE_SIZE - 1, 0, 1);
-       }
+       struct address_space *mapping = inode->i_mapping;
+
+       /*
+        * unmap_mapping_range is called twice, first simply for
+        * efficiency so that truncate_inode_pages does fewer
+        * single-page unmaps.  However after this first call, and
+        * before truncate_inode_pages finishes, it is possible for
+        * private pages to be COWed, which remain after
+        * truncate_inode_pages finishes, hence the second
+        * unmap_mapping_range call must be made for correctness.
+        */
+       unmap_mapping_range(mapping, new + PAGE_SIZE - 1, 0, 1);
+       truncate_inode_pages(mapping, new);
+       unmap_mapping_range(mapping, new + PAGE_SIZE - 1, 0, 1);
 }
 EXPORT_SYMBOL(truncate_pagecache);