[PATCH] sysfs: compile fix, struct file forward declaration

[Chris Wright]

On Tue, May 18, 2010 at 04:44:09PM +1000, Stephen Rothwell wrote:
> After merging the driver-core tree, today's linux-next build (powerpc
> ppc64_defconfig) failed like this:
> 
> cc1: warnings being treated as errors
> In file included from include/linux/kobject.h:21,
>                  from include/linux/device.h:17,
>                  from arch/powerpc/lib/devres.c:10:
> include/linux/sysfs.h:97: error: 'struct file' declared inside parameter list
> include/linux/sysfs.h:97: error: its scope is only this definition or
> declaration, which is probably not what you want
> include/linux/sysfs.h:99: error: 'struct file' declared inside parameter list
> include/linux/sysfs.h:101: error: 'struct file' declared inside parameter list
> 
> and many more (arch/powerpc is built with -Werror (as do some other
> architectures)) and lots of similar warnings ...

Add missing forward declaration

Signed-off-by: Chris Wright <chrisw@xxxxxxxxxxxx>
---
 include/linux/sysfs.h |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index 2a0d278..f06b1f1 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -86,6 +86,7 @@ struct attribute_group {
 
 #define attr_name(_attr) (_attr).attr.name
 
+struct file;
 struct vm_area_struct;
 
 struct bin_attribute {
--
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