1 files changed, 40 insertions, 46 deletions

diff --git a/fs/buffer.c b/fs/buffer.c
index a3ef091a45bd..6fa530256bfd 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -52,6 +52,7 @@ init_buffer(struct buffer_head *bh, bh_end_io_t *handler, void *private)
         bh->b_end_io = handler;
         bh->b_private = private;
 }
+EXPORT_SYMBOL(init_buffer);
 
 static int sync_buffer(void *word)
 {
@@ -80,6 +81,7 @@ void unlock_buffer(struct buffer_head *bh)
         smp_mb__after_clear_bit();
         wake_up_bit(&bh->b_state, BH_Lock);
 }
+EXPORT_SYMBOL(unlock_buffer);
 
 /*
  * Block until a buffer comes unlocked.  This doesn't stop it
@@ -90,6 +92,7 @@ void __wait_on_buffer(struct buffer_head * bh)
 {
         wait_on_bit(&bh->b_state, BH_Lock, sync_buffer, TASK_UNINTERRUPTIBLE);
 }
+EXPORT_SYMBOL(__wait_on_buffer);
 
 static void
 __clear_page_buffers(struct page *page)
@@ -144,6 +147,7 @@ void end_buffer_read_sync(struct buffer_head *bh, int uptodate)
         __end_buffer_read_notouch(bh, uptodate);
         put_bh(bh);
 }
+EXPORT_SYMBOL(end_buffer_read_sync);
 
 void end_buffer_write_sync(struct buffer_head *bh, int uptodate)
 {
@@ -164,6 +168,7 @@ void end_buffer_write_sync(struct buffer_head *bh, int uptodate)
         unlock_buffer(bh);
         put_bh(bh);
 }
+EXPORT_SYMBOL(end_buffer_write_sync);
 
 /*
  * Various filesystems appear to want __find_get_block to be non-blocking.
@@ -272,16 +277,17 @@ void invalidate_bdev(struct block_device *bdev)
         invalidate_bh_lrus();
         invalidate_mapping_pages(mapping, 0, -1);
 }
+EXPORT_SYMBOL(invalidate_bdev);
 
 /*
- * Kick pdflush then try to free up some ZONE_NORMAL memory.
+ * Kick the writeback threads then try to free up some ZONE_NORMAL memory.
  */
 static void free_more_memory(void)
 {
         struct zone *zone;
         int nid;
 
-        wakeup_pdflush(1024);
+        wakeup_flusher_threads(1024);
         yield();
 
         for_each_online_node(nid) {
@@ -410,6 +416,7 @@ still_busy:
         local_irq_restore(flags);
         return;
 }
+EXPORT_SYMBOL(end_buffer_async_write);
 
 /*
  * If a page's buffers are under async readin (end_buffer_async_read
@@ -438,8 +445,8 @@ static void mark_buffer_async_read(struct buffer_head *bh)
         set_buffer_async_read(bh);
 }
 
-void mark_buffer_async_write_endio(struct buffer_head *bh,
-                                   bh_end_io_t *handler)
+static void mark_buffer_async_write_endio(struct buffer_head *bh,
+                                          bh_end_io_t *handler)
 {
         bh->b_end_io = handler;
         set_buffer_async_write(bh);
@@ -553,7 +560,7 @@ repeat:
         return err;
 }
 
-void do_thaw_all(struct work_struct *work)
+static void do_thaw_all(struct work_struct *work)
 {
         struct super_block *sb;
         char b[BDEVNAME_SIZE];
@@ -1165,10 +1172,14 @@ void mark_buffer_dirty(struct buffer_head *bh)
 
         if (!test_set_buffer_dirty(bh)) {
                 struct page *page = bh->b_page;
-                if (!TestSetPageDirty(page))
-                        __set_page_dirty(page, page_mapping(page), 0);
+                if (!TestSetPageDirty(page)) {
+                        struct address_space *mapping = page_mapping(page);
+                        if (mapping)
+                                __set_page_dirty(page, mapping, 0);
+                }
         }
 }
+EXPORT_SYMBOL(mark_buffer_dirty);
 
 /*
  * Decrement a buffer_head's reference count.  If all buffers against a page
@@ -1185,6 +1196,7 @@ void __brelse(struct buffer_head * buf)
         }
         WARN(1, KERN_ERR "VFS: brelse: Trying to free free buffer\n");
 }
+EXPORT_SYMBOL(__brelse);
 
 /*
  * bforget() is like brelse(), except it discards any
@@ -1203,6 +1215,7 @@ void __bforget(struct buffer_head *bh)
         }
         __brelse(bh);
 }
+EXPORT_SYMBOL(__bforget);
 
 static struct buffer_head *__bread_slow(struct buffer_head *bh)
 {
@@ -1696,9 +1709,9 @@ static int __block_write_full_page(struct inode *inode, struct page *page,
                 /*
                  * If it's a fully non-blocking write attempt and we cannot
                  * lock the buffer then redirty the page.  Note that this can
-                 * potentially cause a busy-wait loop from pdflush and kswapd
-                 * activity, but those code paths have their own higher-level
-                 * throttling.
+                 * potentially cause a busy-wait loop from writeback threads
+                 * and kswapd activity, but those code paths have their own
+                 * higher-level throttling.
                  */
                 if (wbc->sync_mode != WB_SYNC_NONE || !wbc->nonblocking) {
                         lock_buffer(bh);
@@ -2215,6 +2228,7 @@ int block_read_full_page(struct page *page, get_block_t *get_block)
         }
         return 0;
 }
+EXPORT_SYMBOL(block_read_full_page);
 
 /* utility function for filesystems that need to do work on expanding
  * truncates.  Uses filesystem pagecache writes to allow the filesystem to
@@ -2225,16 +2239,10 @@ int generic_cont_expand_simple(struct inode *inode, loff_t size)
         struct address_space *mapping = inode->i_mapping;
         struct page *page;
         void *fsdata;
-        unsigned long limit;
         int err;
 
-        err = -EFBIG;
-        limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
-        if (limit != RLIM_INFINITY && size > (loff_t)limit) {
-                send_sig(SIGXFSZ, current, 0);
-                goto out;
-        }
-        if (size > inode->i_sb->s_maxbytes)
+        err = inode_newsize_ok(inode, size);
+        if (err)
                 goto out;
 
         err = pagecache_write_begin(NULL, mapping, size, 0,
@@ -2249,6 +2257,7 @@ int generic_cont_expand_simple(struct inode *inode, loff_t size)
 out:
         return err;
 }
+EXPORT_SYMBOL(generic_cont_expand_simple);
 
 static int cont_expand_zero(struct file *file, struct address_space *mapping,
                             loff_t pos, loff_t *bytes)
@@ -2349,6 +2358,7 @@ int cont_write_begin(struct file *file, struct address_space *mapping,
 out:
         return err;
 }
+EXPORT_SYMBOL(cont_write_begin);
 
 int block_prepare_write(struct page *page, unsigned from, unsigned to,
                         get_block_t *get_block)
@@ -2359,6 +2369,7 @@ int block_prepare_write(struct page *page, unsigned from, unsigned to,
                 ClearPageUptodate(page);
         return err;
 }
+EXPORT_SYMBOL(block_prepare_write);
 
 int block_commit_write(struct page *page, unsigned from, unsigned to)
 {
@@ -2366,6 +2377,7 @@ int block_commit_write(struct page *page, unsigned from, unsigned to)
         __block_commit_write(inode,page,from,to);
         return 0;
 }
+EXPORT_SYMBOL(block_commit_write);
 
 /*
  * block_page_mkwrite() is not allowed to change the file size as it gets
@@ -2423,6 +2435,7 @@ block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf,
 out:
         return ret;
 }
+EXPORT_SYMBOL(block_page_mkwrite);
 
 /*
  * nobh_write_begin()'s prereads are special: the buffer_heads are freed
@@ -2846,6 +2859,7 @@ unlock:
 out:
         return err;
 }
+EXPORT_SYMBOL(block_truncate_page);
 
 /*
  * The generic ->writepage function for buffer-backed address_spaces
@@ -2887,6 +2901,7 @@ int block_write_full_page_endio(struct page *page, get_block_t *get_block,
         zero_user_segment(page, offset, PAGE_CACHE_SIZE);
         return __block_write_full_page(inode, page, get_block, wbc, handler);
 }
+EXPORT_SYMBOL(block_write_full_page_endio);
 
 /*
  * The generic ->writepage function for buffer-backed address_spaces
@@ -2897,7 +2912,7 @@ int block_write_full_page(struct page *page, get_block_t *get_block,
         return block_write_full_page_endio(page, get_block, wbc,
                                            end_buffer_async_write);
 }
-
+EXPORT_SYMBOL(block_write_full_page);
 
 sector_t generic_block_bmap(struct address_space *mapping, sector_t block,
                             get_block_t *get_block)
@@ -2910,6 +2925,7 @@ sector_t generic_block_bmap(struct address_space *mapping, sector_t block,
         get_block(inode, block, &tmp, 0);
         return tmp.b_blocknr;
 }
+EXPORT_SYMBOL(generic_block_bmap);
 
 static void end_bio_bh_io_sync(struct bio *bio, int err)
 {
@@ -2979,6 +2995,7 @@ int submit_bh(int rw, struct buffer_head * bh)
         bio_put(bio);
         return ret;
 }
+EXPORT_SYMBOL(submit_bh);
 
 /**
  * ll_rw_block: low-level access to block devices (DEPRECATED)
@@ -3040,6 +3057,7 @@ void ll_rw_block(int rw, int nr, struct buffer_head *bhs[])
                 unlock_buffer(bh);
         }
 }
+EXPORT_SYMBOL(ll_rw_block);
 
 /*
  * For a data-integrity writeout, we need to wait upon any in-progress I/O
@@ -3068,6 +3086,7 @@ int sync_dirty_buffer(struct buffer_head *bh)
         }
         return ret;
 }
+EXPORT_SYMBOL(sync_dirty_buffer);
 
 /*
  * try_to_free_buffers() checks if all the buffers on this particular page
@@ -3182,13 +3201,14 @@ void block_sync_page(struct page *page)
         if (mapping)
                 blk_run_backing_dev(mapping->backing_dev_info, page);
 }
+EXPORT_SYMBOL(block_sync_page);
 
 /*
  * There are no bdflush tunables left.  But distributions are
  * still running obsolete flush daemons, so we terminate them here.
  *
  * Use of bdflush() is deprecated and will be removed in a future kernel.
- * The `pdflush' kernel threads fully replace bdflush daemons and this call.
+ * The `flush-X' kernel threads fully replace bdflush daemons and this call.
  */
 SYSCALL_DEFINE2(bdflush, int, func, long, data)
 {
@@ -3358,29 +3378,3 @@ void __init buffer_init(void)
         max_buffer_heads = nrpages * (PAGE_SIZE / sizeof(struct buffer_head));
         hotcpu_notifier(buffer_cpu_notify, 0);
 }
-
-EXPORT_SYMBOL(__bforget);
-EXPORT_SYMBOL(__brelse);
-EXPORT_SYMBOL(__wait_on_buffer);
-EXPORT_SYMBOL(block_commit_write);
-EXPORT_SYMBOL(block_prepare_write);
-EXPORT_SYMBOL(block_page_mkwrite);
-EXPORT_SYMBOL(block_read_full_page);
-EXPORT_SYMBOL(block_sync_page);
-EXPORT_SYMBOL(block_truncate_page);
-EXPORT_SYMBOL(block_write_full_page);
-EXPORT_SYMBOL(block_write_full_page_endio);
-EXPORT_SYMBOL(cont_write_begin);
-EXPORT_SYMBOL(end_buffer_read_sync);
-EXPORT_SYMBOL(end_buffer_write_sync);
-EXPORT_SYMBOL(end_buffer_async_write);
-EXPORT_SYMBOL(file_fsync);
-EXPORT_SYMBOL(generic_block_bmap);
-EXPORT_SYMBOL(generic_cont_expand_simple);
-EXPORT_SYMBOL(init_buffer);
-EXPORT_SYMBOL(invalidate_bdev);
-EXPORT_SYMBOL(ll_rw_block);
-EXPORT_SYMBOL(mark_buffer_dirty);
-EXPORT_SYMBOL(submit_bh);
-EXPORT_SYMBOL(sync_dirty_buffer);
-EXPORT_SYMBOL(unlock_buffer);