switch minix to ->evict_inode(), fix write_inode/delete_inode race

We need to wait for completion of possible writeback in progress
before we clear on-disk inode during deletion.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/minix/bitmap.c b/fs/minix/bitmap.c
index 482779f..3f32bcb 100644
--- a/fs/minix/bitmap.c
+++ b/fs/minix/bitmap.c
@@ -200,13 +200,13 @@
 	ino = inode->i_ino;
 	if (ino < 1 || ino > sbi->s_ninodes) {
 		printk("minix_free_inode: inode 0 or nonexistent inode\n");
-		goto out;
+		return;
 	}
 	bit = ino & ((1<<k) - 1);
 	ino >>= k;
 	if (ino >= sbi->s_imap_blocks) {
 		printk("minix_free_inode: nonexistent imap in superblock\n");
-		goto out;
+		return;
 	}
 
 	minix_clear_inode(inode);	/* clear on-disk copy */
@@ -217,8 +217,6 @@
 		printk("minix_free_inode: bit %lu already cleared\n", bit);
 	spin_unlock(&bitmap_lock);
 	mark_buffer_dirty(bh);
- out:
-	clear_inode(inode);		/* clear in-memory copy */
 }
 
 struct inode *minix_new_inode(const struct inode *dir, int mode, int *error)