linux-kernel - Re: [PATCH 16/17] fs: Convert nr

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Date:	Wed, 29 Sep 2010 22:12:37 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Dave Chinner <david@...morbit.com>, dada1@...mosbay.com
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 16/17] fs: Convert nr_inodes to a per-cpu counter

> +/*
> + * Handle nr_dentry sysctl
> + */
> +int proc_nr_inodes(ctl_table *table, int write,
> +		   void __user *buffer, size_t *lenp, loff_t *ppos)
> +{
> +#if defined(CONFIG_SYSCTL) && defined(CONFIG_PROC_FS)
> +	inodes_stat.nr_inodes = get_nr_inodes();
> +	return proc_dointvec(table, write, buffer, lenp, ppos);
> +#else
> +	return -ENOSYS;
> +#endif
> +}

Why would we even bother to define the handler if we don't have
/proc/sys/ support?

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