Re: [PATCH 7/7] fs: Do not overload update_time

[Christoph Hellwig]

On Fri, Nov 29, 2019 at 09:30:30PM -0800, Deepa Dinamani wrote:
> -	int (*update_time)(struct inode *, struct timespec64 *, int);
> +	int (*cb)(struct inode *, struct timespec64 *, int);
>  
> -	update_time = inode->i_op->update_time ? inode->i_op->update_time :
> +	cb = inode->i_op->update_time ? inode->i_op->update_time :
>  		generic_update_time;
>  
> -	return update_time(inode, time, flags);
> +	return cb(inode, time, flags);

Just killing the pointless local variable cleans the function op, and
also avoids the expensive indirect call for the common case:

	if (inode->i_op->update_time)
		return inode->i_op->update_time(inode, time, flags);
	return generic_update_time(inode, time, flags);