linux-kernel - Re: [PATCH 10/10] change function orders in paravirt.h

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Date:	Fri, 18 Jan 2008 12:24:47 -0800
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Glauber de Oliveira Costa <gcosta@...hat.com>
CC:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	glommer@...il.com, tglx@...utronix.de, mingo@...e.hu,
	ehabkost@...hat.com, avi@...ranet.com, anthony@...emonkey.ws,
	virtualization@...ts.linux-foundation.org, rusty@...tcorp.com.au,
	ak@...e.de, chrisw@...s-sol.org, rostedt@...dmis.org,
	hpa@...or.com, zach@...are.com, roland@...hat.com,
	mtosatti@...hat.com
Subject: Re: [PATCH 10/10] change function orders in paravirt.h

Glauber de Oliveira Costa wrote:
> __pmd, pmd_val and set_pud are used before they are defined (as static)
> We move them a little up in the file, so it doesn't happen.
>   

Hm, in my original patches I put the #ifdef CONFIG_X86_PAE below the 
PAGETABLE_LEVELS section.  Does that work?  Or is that an equivalent 
transform?

    J
> Signed-off-by: Glauber de Oliveira Costa <gcosta@...hat.com>
> ---
>  include/asm-x86/paravirt.h |   84 ++++++++++++++++++++++----------------------
>  1 files changed, 42 insertions(+), 42 deletions(-)
>
> diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
> index 3e7ca42..12caaf1 100644
> --- a/include/asm-x86/paravirt.h
> +++ b/include/asm-x86/paravirt.h
> @@ -1023,6 +1023,48 @@ static inline void set_pmd(pmd_t *pmdp, pmd_t pmd)
>  		PVOP_VCALL2(pv_mmu_ops.set_pmd, pmdp, val);
>  }
>  
> +#if PAGETABLE_LEVELS >= 3
> +static inline pmd_t __pmd(pmdval_t val)
> +{
> +	pmdval_t ret;
> +
> +	if (sizeof(pmdval_t) > sizeof(long))
> +		ret = PVOP_CALL2(pmdval_t, pv_mmu_ops.make_pmd,
> +				 val, (u64)val >> 32);
> +	else
> +		ret = PVOP_CALL1(pmdval_t, pv_mmu_ops.make_pmd,
> +				 val);
> +
> +	return (pmd_t) { ret };
> +}
> +
> +static inline pmdval_t pmd_val(pmd_t pmd)
> +{
> +	pmdval_t ret;
> +
> +	if (sizeof(pmdval_t) > sizeof(long))
> +		ret =  PVOP_CALL2(pmdval_t, pv_mmu_ops.pmd_val,
> +				  pmd.pmd, (u64)pmd.pmd >> 32);
> +	else
> +		ret =  PVOP_CALL1(pmdval_t, pv_mmu_ops.pmd_val,
> +				  pmd.pmd);
> +
> +	return ret;
> +}
> +
> +static inline void set_pud(pud_t *pudp, pud_t pud)
> +{
> +	pudval_t val = native_pud_val(pud);
> +
> +	if (sizeof(pudval_t) > sizeof(long))
> +		PVOP_VCALL3(pv_mmu_ops.set_pud, pudp,
> +			    val, (u64)val >> 32);
> +	else
> +		PVOP_VCALL2(pv_mmu_ops.set_pud, pudp,
> +			    val);
> +}
> +#endif	/* PAGETABLE_LEVELS >= 3 */
> +
>  #ifdef CONFIG_X86_PAE
>  /* Special-case pte-setting operations for PAE, which can't update a
>     64-bit pte atomically */
> @@ -1073,48 +1115,6 @@ static inline void pmd_clear(pmd_t *pmdp)
>  }
>  #endif	/* CONFIG_X86_PAE */
>  
> -#if PAGETABLE_LEVELS >= 3
> -static inline pmd_t __pmd(pmdval_t val)
> -{
> -	pmdval_t ret;
> -
> -	if (sizeof(pmdval_t) > sizeof(long))
> -		ret = PVOP_CALL2(pmdval_t, pv_mmu_ops.make_pmd,
> -				 val, (u64)val >> 32);
> -	else
> -		ret = PVOP_CALL1(pmdval_t, pv_mmu_ops.make_pmd,
> -				 val);
> -
> -	return (pmd_t) { ret };
> -}
> -
> -static inline pmdval_t pmd_val(pmd_t pmd)
> -{
> -	pmdval_t ret;
> -
> -	if (sizeof(pmdval_t) > sizeof(long))
> -		ret =  PVOP_CALL2(pmdval_t, pv_mmu_ops.pmd_val,
> -				  pmd.pmd, (u64)pmd.pmd >> 32);
> -	else
> -		ret =  PVOP_CALL1(pmdval_t, pv_mmu_ops.pmd_val,
> -				  pmd.pmd);
> -
> -	return ret;
> -}
> -
> -static inline void set_pud(pud_t *pudp, pud_t pud)
> -{
> -	pudval_t val = native_pud_val(pud);
> -
> -	if (sizeof(pudval_t) > sizeof(long))
> -		PVOP_VCALL3(pv_mmu_ops.set_pud, pudp,
> -			    val, (u64)val >> 32);
> -	else
> -		PVOP_VCALL2(pv_mmu_ops.set_pud, pudp,
> -			    val);
> -}
> -#endif	/* PAGETABLE_LEVELS >= 3 */
> -
>  /* Lazy mode for batching updates / context switch */
>  enum paravirt_lazy_mode {
>  	PARAVIRT_LAZY_NONE,
>   

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