X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=include%2Flinux%2Fbuffer_head.h;h=eadaab44015f62e4fa04ab003828945d6c6bf503;hb=80cec14a83ad0ad109d822b3f3482a379bc481ba;hp=932eb02a2753544706983630b58006d4aafa761c;hpb=bdc08942897f6be33d00bb659761516f4652836d;p=linux-2.6-omap-h63xx.git

diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h
index 932eb02a275..eadaab44015 100644
--- a/include/linux/buffer_head.h
+++ b/include/linux/buffer_head.h
@@ -115,7 +115,6 @@ BUFFER_FNS(Uptodate, uptodate)
 BUFFER_FNS(Dirty, dirty)
 TAS_BUFFER_FNS(Dirty, dirty)
 BUFFER_FNS(Lock, locked)
-TAS_BUFFER_FNS(Lock, locked)
 BUFFER_FNS(Req, req)
 TAS_BUFFER_FNS(Req, req)
 BUFFER_FNS(Mapped, mapped)
@@ -205,6 +204,8 @@ void block_invalidatepage(struct page *page, unsigned long offset);
 int block_write_full_page(struct page *page, get_block_t *get_block,
 				struct writeback_control *wbc);
 int block_read_full_page(struct page*, get_block_t*);
+int block_is_partially_uptodate(struct page *page, read_descriptor_t *desc,
+				unsigned long from);
 int block_write_begin(struct file *, struct address_space *,
 				loff_t, unsigned, unsigned,
 				struct page **, void **, get_block_t*);
@@ -225,7 +226,6 @@ int block_page_mkwrite(struct vm_area_struct *vma, struct page *page,
 				get_block_t get_block);
 void block_sync_page(struct page *);
 sector_t generic_block_bmap(struct address_space *, sector_t, get_block_t *);
-int generic_commit_write(struct file *, struct page *, unsigned, unsigned);
 int block_truncate_page(struct address_space *, loff_t, get_block_t *);
 int file_fsync(struct file *, struct dentry *, int);
 int nobh_write_begin(struct file *, struct address_space *,
@@ -320,10 +320,15 @@ static inline void wait_on_buffer(struct buffer_head *bh)
 		__wait_on_buffer(bh);
 }
 
+static inline int trylock_buffer(struct buffer_head *bh)
+{
+	return likely(!test_and_set_bit(BH_Lock, &bh->b_state));
+}
+
 static inline void lock_buffer(struct buffer_head *bh)
 {
 	might_sleep();
-	if (test_set_buffer_locked(bh))
+	if (!trylock_buffer(bh))
 		__lock_buffer(bh);
 }