[PATCH -V3 03/11] arch/powerpc: Convert virtual address to vpn

[Stephen Rothwell]

Hi Aneesh,

On Mon,  9 Jul 2012 18:43:33 +0530 "Aneesh Kumar K.V" <aneesh.kumar at linux.vnet.ibm.com> wrote:
>
> diff --git a/arch/powerpc/mm/hash_native_64.c b/arch/powerpc/mm/hash_native_64.c
> index 660b8bb..308e29d 100644
> --- a/arch/powerpc/mm/hash_native_64.c
> +++ b/arch/powerpc/mm/hash_native_64.c
> @@ -39,22 +39,33 @@
>  
>  DEFINE_RAW_SPINLOCK(native_tlbie_lock);
>  
> -static inline void __tlbie(unsigned long va, int psize, int ssize)
> +static inline void __tlbie(unsigned long vpn, int psize, int ssize)
>  {
> +	unsigned long va;
>  	unsigned int penc;
>  
> +	/*
> +	 * We need 14 to 65 bits of va for a tlibe of 4K page
> +	 * With vpn we ignore the lower VPN_SHIFT bits already.
> +	 * And top two bits are already ignored because we can
> +	 * only accomadate 76 bits in a 64 bit vpn with a VPN_SHIFT
> +	 * of 12.
> +	 */
> +	BUG_ON((77 - 65) > VPN_SHIFT);

BUILD_BUG_ON() ?

> -static inline void __tlbiel(unsigned long va, int psize, int ssize)
> +static inline void __tlbiel(unsigned long vpn, int psize, int ssize)
>  {
> +	unsigned long va;
>  	unsigned int penc;
>  
> +	BUG_ON((77 - 65) > VPN_SHIFT);

BUILD_BUG_ON() ?

-- 
Cheers,
Stephen Rothwell                    sfr at canb.auug.org.au
http://www.canb.auug.org.au/~sfr/
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