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)
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*);
__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);
}