mm: remove nrexceptional from inode

We no longer track anything in nrexceptional, so remove it, saving 8 bytes
per inode.

Link: https://lkml.kernel.org/r/20201026151849.24232-5-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Tested-by: Vishal Verma <vishal.l.verma@intel.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/inode.c b/fs/inode.c
index 9e192be..af48d1b 100644 (file)
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -529,7 +529,7 @@ void clear_inode(struct inode *inode)
         */
        xa_lock_irq(&inode->i_data.i_pages);
        BUG_ON(inode->i_data.nrpages);
-       BUG_ON(inode->i_data.nrexceptional);
+       BUG_ON(!mapping_empty(&inode->i_data));
        xa_unlock_irq(&inode->i_data.i_pages);
        BUG_ON(!list_empty(&inode->i_data.private_list));
        BUG_ON(!(inode->i_state & I_FREEING));

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 12766ed..acef282 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -442,7 +442,6 @@ int pagecache_write_end(struct file *, struct address_space *mapping,
  * @i_mmap: Tree of private and shared mappings.
  * @i_mmap_rwsem: Protects @i_mmap and @i_mmap_writable.
  * @nrpages: Number of page entries, protected by the i_pages lock.
- * @nrexceptional: Shadow or DAX entries, protected by the i_pages lock.
  * @writeback_index: Writeback starts here.
  * @a_ops: Methods.
  * @flags: Error bits and flags (AS_*).
@@ -463,7 +462,6 @@ struct address_space {
        struct rb_root_cached   i_mmap;
        struct rw_semaphore     i_mmap_rwsem;
        unsigned long           nrpages;
-       unsigned long           nrexceptional;
        pgoff_t                 writeback_index;
        const struct address_space_operations *a_ops;
        unsigned long           flags;