autofs4: fix incorrect return from root.c:try_to_fill_dentry()

[safe/jmp/linux-2.6] / fs / buffer.c

diff --git a/fs/buffer.c b/fs/buffer.c
index 3ebccf4..a073f3f 100644 (file)
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -360,16 +360,19 @@ void invalidate_bdev(struct block_device *bdev)
  */
 static void free_more_memory(void)
 {
-       struct zone **zones;
-       pg_data_t *pgdat;
+       struct zone *zone;
+       int nid;
 
        wakeup_pdflush(1024);
        yield();
 
-       for_each_online_pgdat(pgdat) {
-               zones = pgdat->node_zonelists[gfp_zone(GFP_NOFS)].zones;
-               if (*zones)
-                       try_to_free_pages(zones, 0, GFP_NOFS);
+       for_each_online_node(nid) {
+               (void)first_zones_zonelist(node_zonelist(nid, GFP_NOFS),
+                                               gfp_zone(GFP_NOFS), NULL,
+                                               &zone);
+               if (zone)
+                       try_to_free_pages(node_zonelist(nid, GFP_NOFS), 0,
+                                               GFP_NOFS);
        }
 }
 
@@ -627,8 +630,7 @@ repeat:
 }
 
 /**
- * sync_mapping_buffers - write out and wait upon a mapping's "associated"
- *                        buffers
+ * sync_mapping_buffers - write out & wait upon a mapping's "associated" buffers
  * @mapping: the mapping which wants those buffers written
  *
  * Starts I/O against the buffers at mapping->private_list, and waits upon
@@ -836,7 +838,7 @@ static int fsync_buffers_list(spinlock_t *lock, struct list_head *list)
                smp_mb();
                if (buffer_dirty(bh)) {
                        list_add(&bh->b_assoc_buffers,
-                                &bh->b_assoc_map->private_list);
+                                &mapping->private_list);
                        bh->b_assoc_map = mapping;
                }
                spin_unlock(lock);
@@ -1099,7 +1101,7 @@ grow_buffers(struct block_device *bdev, sector_t block, int size)
 
                printk(KERN_ERR "%s: requested out-of-range block %llu for "
                        "device %s\n",
-                       __FUNCTION__, (unsigned long long)block,
+                       __func__, (unsigned long long)block,
                        bdevname(bdev, b));
                return -EIO;
        }
@@ -1182,7 +1184,20 @@ __getblk_slow(struct block_device *bdev, sector_t block, int size)
 void mark_buffer_dirty(struct buffer_head *bh)
 {
        WARN_ON_ONCE(!buffer_uptodate(bh));
-       if (!buffer_dirty(bh) && !test_set_buffer_dirty(bh))
+
+       /*
+        * Very *carefully* optimize the it-is-already-dirty case.
+        *
+        * Don't let the final "is it dirty" escape to before we
+        * perhaps modified the buffer.
+        */
+       if (buffer_dirty(bh)) {
+               smp_mb();
+               if (buffer_dirty(bh))
+                       return;
+       }
+
+       if (!test_set_buffer_dirty(bh))
                __set_page_dirty(bh->b_page, page_mapping(bh->b_page), 0);
 }
 
@@ -2196,8 +2211,8 @@ out:
        return err;
 }
 
-int cont_expand_zero(struct file *file, struct address_space *mapping,
-                       loff_t pos, loff_t *bytes)
+static int cont_expand_zero(struct file *file, struct address_space *mapping,
+                           loff_t pos, loff_t *bytes)
 {
        struct inode *inode = mapping->host;
        unsigned blocksize = 1 << inode->i_blkbits;
@@ -2231,6 +2246,8 @@ int cont_expand_zero(struct file *file, struct address_space *mapping,
                        goto out;
                BUG_ON(err != len);
                err = 0;
+
+               balance_dirty_pages_ratelimited(mapping);
        }
 
        /* page covers the boundary, find the boundary offset */
@@ -2311,23 +2328,6 @@ int block_commit_write(struct page *page, unsigned from, unsigned to)
        return 0;
 }
 
-int generic_commit_write(struct file *file, struct page *page,
-               unsigned from, unsigned to)
-{
-       struct inode *inode = page->mapping->host;
-       loff_t pos = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to;
-       __block_commit_write(inode,page,from,to);
-       /*
-        * No need to use i_size_read() here, the i_size
-        * cannot change under us because we hold i_mutex.
-        */
-       if (pos > inode->i_size) {
-               i_size_write(inode, pos);
-               mark_inode_dirty(inode);
-       }
-       return 0;
-}
-
 /*
  * block_page_mkwrite() is not allowed to change the file size as it gets
  * called from a page fault handler when a page is first dirtied. Hence we must
@@ -2565,14 +2565,13 @@ int nobh_write_end(struct file *file, struct address_space *mapping,
        struct inode *inode = page->mapping->host;
        struct buffer_head *head = fsdata;
        struct buffer_head *bh;
+       BUG_ON(fsdata != NULL && page_has_buffers(page));
 
-       if (!PageMappedToDisk(page)) {
-               if (unlikely(copied < len) && !page_has_buffers(page))
-                       attach_nobh_buffers(page, head);
-               if (page_has_buffers(page))
-                       return generic_write_end(file, mapping, pos, len,
-                                               copied, page, fsdata);
-       }
+       if (unlikely(copied < len) && !page_has_buffers(page))
+               attach_nobh_buffers(page, head);
+       if (page_has_buffers(page))
+               return generic_write_end(file, mapping, pos, len,
+                                       copied, page, fsdata);
 
        SetPageUptodate(page);
        set_page_dirty(page);
@@ -3169,8 +3168,7 @@ static void recalc_bh_state(void)
        
 struct buffer_head *alloc_buffer_head(gfp_t gfp_flags)
 {
-       struct buffer_head *ret = kmem_cache_alloc(bh_cachep,
-                               set_migrateflags(gfp_flags, __GFP_RECLAIMABLE));
+       struct buffer_head *ret = kmem_cache_alloc(bh_cachep, gfp_flags);
        if (ret) {
                INIT_LIST_HEAD(&ret->b_assoc_buffers);
                get_cpu_var(bh_accounting).nr++;
@@ -3214,7 +3212,7 @@ static int buffer_cpu_notify(struct notifier_block *self,
 }
 
 /**
- * bh_uptodate_or_lock: Test whether the buffer is uptodate
+ * bh_uptodate_or_lock - Test whether the buffer is uptodate
  * @bh: struct buffer_head
  *
  * Return true if the buffer is up-to-date and false,
@@ -3233,7 +3231,7 @@ int bh_uptodate_or_lock(struct buffer_head *bh)
 EXPORT_SYMBOL(bh_uptodate_or_lock);
 
 /**
- * bh_submit_read: Submit a locked buffer for reading
+ * bh_submit_read - Submit a locked buffer for reading
  * @bh: struct buffer_head
  *
  * Returns zero on success and -EIO on error.
@@ -3300,7 +3298,6 @@ EXPORT_SYMBOL(end_buffer_write_sync);
 EXPORT_SYMBOL(file_fsync);
 EXPORT_SYMBOL(fsync_bdev);
 EXPORT_SYMBOL(generic_block_bmap);
-EXPORT_SYMBOL(generic_commit_write);
 EXPORT_SYMBOL(generic_cont_expand_simple);
 EXPORT_SYMBOL(init_buffer);
 EXPORT_SYMBOL(invalidate_bdev);