Re: [PATCH] fs/jfs: fix error due to PF_* undeclared

[Richard Knutsson <ricknu-0@student.ltu.se>]

Randy Dunlap wrote:
> On Fri, 08 Dec 2006 19:56:20 +0100 Richard Knutsson wrote:
>
>   
> >   CC [M]  fs/jfs/jfs_txnmgr.o
> > In file included from fs/jfs/jfs_txnmgr.c:49:
> > include/linux/freezer.h: In function ‘frozen’:
> > include/linux/freezer.h:9: error: dereferencing pointer to incomplete type
> > include/linux/freezer.h:9: error: ‘PF_FROZEN’ undeclared (first use in this function)
> > <snip>
> > fs/jfs/jfs_txnmgr.c: In function ‘freezing’:
> > include/linux/freezer.h:18: warning: control reaches end of non-void function
> > make[2]: *** [fs/jfs/jfs_txnmgr.o] Error 1
> > make[1]: *** [fs/jfs] Error 2
> > make: *** [fs] Error 2
> >
> > Signed-off-by: Richard Knutsson <ricknu-0@student.ltu.se>
> >
> > ---
> >
> > Guess this is the desired fix, since including linux/sched.h in linux/freezer.h
> > make little sense.
> >     
>
> Why do you say that?  freezer.h is what uses those #defined values,
> and freezer.h is what uses struct task_struct fields as well,
> so it needs sched.h.
>   
Oh, an error of thought when I read the patch 
7dfb71030f7636a0d65200158113c37764552f93 made that statement. After more 
checking, sched.h is apperarently included in suspend.h from swap.h so 
the direct include of sched.h in most drivers was/is not nessecary.

Do you agree with the patch below then? This was how I first fixed it 
but found it strange no-one hit it before, and from there it went on... 
Thanks for the help. (Sign it?)
> > diff --git a/fs/jfs/jfs_txnmgr.c b/fs/jfs/jfs_txnmgr.c
> > index d558e51..2aee0a8 100644
> > --- a/fs/jfs/jfs_txnmgr.c
> > +++ b/fs/jfs/jfs_txnmgr.c
> > @@ -46,6 +46,7 @@ #include <linux/fs.h>
> >  #include <linux/vmalloc.h>
> >  #include <linux/smp_lock.h>
> >  #include <linux/completion.h>
> > +#include <linux/sched.h>
> >  #include <linux/freezer.h>
> >  #include <linux/module.h>
> >  #include <linux/moduleparam.h>
> >
> >     
 CC [M]  fs/jfs/jfs_txnmgr.o
In file included from fs/jfs/jfs_txnmgr.c:49:
include/linux/freezer.h: In function ‘frozen’:
include/linux/freezer.h:9: error: dereferencing pointer to incomplete type
include/linux/freezer.h:9: error: ‘PF_FROZEN’ undeclared (first use in this function)
<snip>
fs/jfs/jfs_txnmgr.c: In function ‘freezing’:
include/linux/freezer.h:18: warning: control reaches end of non-void function
make[2]: *** [fs/jfs/jfs_txnmgr.o] Error 1
make[1]: *** [fs/jfs] Error 2
make: *** [fs] Error 2

Signed-off-by: Richard Knutsson <ricknu-0@student.ltu.se>

---

Compile-tested only.


diff --git a/include/linux/freezer.h b/include/linux/freezer.h
index 6e05e3e..f616c0c 100644
--- a/include/linux/freezer.h
+++ b/include/linux/freezer.h
@@ -1,3 +1,4 @@
+#include <linux/sched.h>
/* Freezer declarations */

#ifdef CONFIG_PM


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