[PATCH 02/13] module: add a module_loaded helper

[Christophe Leroy]

Le 21/01/2021 à 08:49, Christoph Hellwig a écrit :
> Add a helper that takes modules_mutex and uses find_module to check if a
> given module is loaded.  This provides a better abstraction for the two
> callers, and allows to unexport modules_mutex and find_module.
> 
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> ---
>   drivers/gpu/drm/drm_fb_helper.c |  7 +------
>   include/linux/module.h          |  3 +++
>   kernel/module.c                 | 14 ++++++++++++--
>   kernel/trace/trace_kprobe.c     |  4 +---
>   4 files changed, 17 insertions(+), 11 deletions(-)
> 

> diff --git a/include/linux/module.h b/include/linux/module.h
> index 7a0bcb5b1ffccd..b4654f8a408134 100644
> --- a/include/linux/module.h
> +++ b/include/linux/module.h
> @@ -589,6 +589,9 @@ static inline bool within_module(unsigned long addr, const struct module *mod)
>   /* Search for module by name: must hold module_mutex. */
>   struct module *find_module(const char *name);
>   
> +/* Check if a module is loaded. */
> +bool module_loaded(const char *name);

Maybe module_is_loaded() would be a better name.