From: Arnd Bergmann <arnd@arndb.de>
Date: Fri, 6 Jul 2018 20:19:07 +0000 (+0200)
Subject: scsi: target: sbitmap: add seq_file forward declaration
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=14b470b56840dbb093abd71f214e9d63770c87b8;p=linux.git

scsi: target: sbitmap: add seq_file forward declaration

The target core runs into a warning in the linux/sbitmap.h
file in some configurations:

In file included from include/target/target_core_base.h:7,
                 from drivers/target/target_core_fabric_lib.c:41:
include/linux/sbitmap.h:331:46: error: 'struct seq_file' declared inside parameter list will not be visible outside of this definition or declaration [-Werror]
 void sbitmap_show(struct sbitmap *sb, struct seq_file *m);
                                              ^~~~~~~~

In general, headers should not depend on others being included first,
so this fixes it with a forward declaration for that struct name, but
we probably want to merge the patch through the scsi tree to help
bisection.

Fixes: 10e9cbb6b531 ("scsi: target: Convert target drivers to use sbitmap")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Reviewed-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---

diff --git a/include/linux/sbitmap.h b/include/linux/sbitmap.h
index e6539536dea97..804a50983ec59 100644
--- a/include/linux/sbitmap.h
+++ b/include/linux/sbitmap.h
@@ -23,6 +23,8 @@
 #include <linux/kernel.h>
 #include <linux/slab.h>
 
+struct seq_file;
+
 /**
  * struct sbitmap_word - Word in a &struct sbitmap.
  */