[PATCH 1/7] staging: erofs: code cleanup for erofs_kmalloc()

[Chao Yu]

On 2018/9/12 13:10, Chengguang Xu wrote:
> Define a dummy function of time_to_inject(), so that we don't
> have to check macro CONFIG_EROFS_FAULT_INJECTION in calling place.
> Base on above adjustment, do proper code cleanup for erofs_kmalloc().
> 
> Signed-off-by: Chengguang Xu <cgxu519 at gmx.com>
> ---
>  drivers/staging/erofs/internal.h | 16 ++++++++++------
>  1 file changed, 10 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/staging/erofs/internal.h b/drivers/staging/erofs/internal.h
> index 367b39fe46e5..1bb2e9e96143 100644
> --- a/drivers/staging/erofs/internal.h
> +++ b/drivers/staging/erofs/internal.h
> @@ -42,12 +42,12 @@
>  #define DBG_BUGON(...)          ((void)0)
>  #endif
>  
> -#ifdef CONFIG_EROFS_FAULT_INJECTION
>  enum {
>  	FAULT_KMALLOC,
>  	FAULT_MAX,
>  };
>  
> +#ifdef CONFIG_EROFS_FAULT_INJECTION
>  extern char *erofs_fault_name[FAULT_MAX];
>  #define IS_FAULT_SET(fi, type) ((fi)->inject_type & (1 << (type)))
>  
> @@ -139,21 +139,25 @@ static inline bool time_to_inject(struct erofs_sb_info *sbi, int type)
>  	atomic_inc(&ffi->inject_ops);
>  	if (atomic_read(&ffi->inject_ops) >= ffi->inject_rate) {
>  		atomic_set(&ffi->inject_ops, 0);
> +		erofs_show_injection_info(type);

I prefer to show injection info in original place, where we can show real
caller of time_to_inject().

Thanks,

>  		return true;
>  	}
>  	return false;
>  }
> +
> +#else
> +static inline bool time_to_inject(struct erofs_sb_info *sbi, int type)
> +{
> +	return false;
> +}
>  #endif
>  
>  static inline void *erofs_kmalloc(struct erofs_sb_info *sbi,
>  					size_t size, gfp_t flags)
>  {
> -#ifdef CONFIG_EROFS_FAULT_INJECTION
> -	if (time_to_inject(sbi, FAULT_KMALLOC)) {
> -		erofs_show_injection_info(FAULT_KMALLOC);
> +	if (time_to_inject(sbi, FAULT_KMALLOC))
>  		return NULL;
> -	}
> -#endif
> +
>  	return kmalloc(size, flags);
>  }
>  
>