I'm getting a lot of warnings about struct super_block in 2.6.23-rc2. Then,
a compile error when compiling fs/drop_caches.o:
CC fs/drop_caches.o
In file included from fs/drop_caches.c:7:
include/linux/mm.h:1210: warning: 'struct super_block' declared inside parameter list
include/linux/mm.h:1210: warning: its scope is only this definition or declaration, which is probably not what you want
fs/drop_caches.c:17: error: conflicting types for 'drop_pagecache_sb'
include/linux/mm.h:1210: error: previous declaration of 'drop_pagecache_sb' was here
fs/drop_caches.c:28: error: conflicting types for 'drop_pagecache_sb'
include/linux/mm.h:1210: error: previous declaration of 'drop_pagecache_sb' was here
make[1]: *** [fs/drop_caches.o] Error 1
make: *** [fs] Error 2
I'm using Linus's tree, which is 2.6.23-rc2 plus all patches up to this
commit:
commit ac07860264bd2b18834d3fa3be47032115524cea
Author: Jesper Juhl <[email protected]>
Date: Wed Aug 8 16:31:30 2007 -0700
I didn't check if this is fixed already in the latest -mm. The following
small fix seems to get rid of all warnings and compile errors I've seen:
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 324c151..ed90191 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -20,6 +20,7 @@ struct anon_vma;
struct file_ra_state;
struct user_struct;
struct writeback_control;
+struct super_block;
#ifndef CONFIG_DISCONTIGMEM /* Don't use mapnrs, do it properly */
extern unsigned long max_mapnr;
Cheers,
Erez.