Re: [RFC v6 13/62] powerpc: track allocation status of all pkeys

From	Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com>
Newsgroups	linux.kernel
Subject	Re: [RFC v6 13/62] powerpc: track allocation status of all pkeys
Date	2017-07-31 20:20 +0200
Message-ID	<u9nsl-19s-3@gated-at.bofh.it> (permalink)
References	<u3ISR-1St-3@gated-at.bofh.it> <u3Jcd-2ea-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Ram Pai <linuxram@us.ibm.com> writes:
>  static inline int mm_pkey_free(struct mm_struct *mm, int pkey)
>  {
> -	return -EINVAL;
> +	if (!pkey_inited)
> +		return -1;

Sorry, I missed this earlier but the pkey_free syscall will pass this
value to userspace so it needs to be an errno as well (-EINVAL?).

> +
> +	if (!mm_pkey_is_allocated(mm, pkey))
> +		return -EINVAL;
> +
> +	mm_set_pkey_free(mm, pkey);
> +
> +	return 0;
>  }

-- 
Thiago Jung Bauermann
IBM Linux Technology Center

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Re: [RFC v6 13/62] powerpc: track allocation status of all pkeys Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com> - 2017-07-31 20:20 +0200

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