On Thu, Jun 25, 2015 at 2:54 AM, Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
> Hi Rusty,
>
> After merging the modules tree, today's linux-next build (powerpc
> allnoconfig) failed like this:
I promise I'll build with all[no|mod|yes]config next time! ;-)
Thanks for catching this one too.
>
> kernel/params.c:628:6: error: redefinition of 'kernel_param_lock'
> void kernel_param_lock(struct module *mod)
> ^
> In file included from include/linux/module.h:18:0,
> from kernel/params.c:21:
> include/linux/moduleparam.h:246:20: note: previous definition of 'kernel_param_lock' was here
> static inline void kernel_param_lock(struct module *mod)
> ^
> kernel/params.c:633:6: error: redefinition of 'kernel_param_unlock'
> void kernel_param_unlock(struct module *mod)
> ^
> In file included from include/linux/module.h:18:0,
> from kernel/params.c:21:
> include/linux/moduleparam.h:249:20: note: previous definition of 'kernel_param_unlock' was here
> static inline void kernel_param_unlock(struct module *mod)
> ^
>
> Caused by commit b51d23e4e9fe ("module: add per-module param_lock").
> This had not been tested with CONFIG_SYSFS not set.
>
> I have added the following patch for today (which may not be complete,
> but builds).
this is one way to handle it, but it will cause all modules to use the
built-in param_lock,
which (I don't think) is needed if there's no sysfs; another way would
be to elide the
param_lock entirely if !CONFIG_SYSFS. I'll send a patch for that.
Rusty, is param locking needed if there is no sysfs?
>
> From: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
> Date: Thu, 25 Jun 2015 16:38:51 +1000
> Subject: [PATCH] modules: clean up add per-module param_lock
>
> Signed-off-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
> ---
> include/linux/moduleparam.h | 9 ---------
> 1 file changed, 9 deletions(-)
>
> diff --git a/include/linux/moduleparam.h b/include/linux/moduleparam.h
> index c12f2147c350..428d7c25c383 100644
> --- a/include/linux/moduleparam.h
> +++ b/include/linux/moduleparam.h
> @@ -239,17 +239,8 @@ __check_old_set_param(int (*oldset)(const char *, struct kernel_param *))
> return 0;
> }
>
> -#ifdef CONFIG_SYSFS
> extern void kernel_param_lock(struct module *mod);
> extern void kernel_param_unlock(struct module *mod);
> -#else
> -static inline void kernel_param_lock(struct module *mod)
> -{
> -}
> -static inline void kernel_param_unlock(struct module *mod)
> -{
> -}
> -#endif
>
> #ifndef MODULE
> /**
> --
> 2.1.4
>
> --
> Cheers,
> Stephen Rothwell sfr@xxxxxxxxxxxxxxxx
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