linux-kernel - Re: [Xen-devel] [PATCH] x86: xen: mmu: Remove unused function

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Date:	Mon, 12 Jan 2015 09:23:38 +0100
From:	Jürgen Groß <jgross@...e.com>
To:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>
CC:	x86@...nel.org, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...hat.com>,
	David Vrabel <david.vrabel@...rix.com>,
	"H. Peter Anvin" <hpa@...or.com>, xen-devel@...ts.xenproject.org,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [Xen-devel] [PATCH] x86: xen: mmu: Remove unused function

On 01/11/2015 11:35 PM, Rickard Strandqvist wrote:
> Remove the function set_pte_mfn() that is not used anywhere.
>
> This was partially found by using a static code analysis program called cppcheck.

Sorry, you seem not to have checked the newest kernel.

Used by:

xen_do_set_identity_and_remap_chunk()
xen_remap_memory()

So: Nak.


Juergen

>
> Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
> ---
>   arch/x86/xen/mmu.c |    9 ---------
>   arch/x86/xen/mmu.h |    2 --
>   2 files changed, 11 deletions(-)
>
> diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
> index a8a1a3d..6959550 100644
> --- a/arch/x86/xen/mmu.c
> +++ b/arch/x86/xen/mmu.c
> @@ -281,15 +281,6 @@ static void xen_set_pmd(pmd_t *ptr, pmd_t val)
>   	xen_set_pmd_hyper(ptr, val);
>   }
>
> -/*
> - * Associate a virtual page frame with a given physical page frame
> - * and protection flags for that frame.
> - */
> -void set_pte_mfn(unsigned long vaddr, unsigned long mfn, pgprot_t flags)
> -{
> -	set_pte_vaddr(vaddr, mfn_pte(mfn, flags));
> -}
> -
>   static bool xen_batched_set_pte(pte_t *ptep, pte_t pteval)
>   {
>   	struct mmu_update u;
> diff --git a/arch/x86/xen/mmu.h b/arch/x86/xen/mmu.h
> index 73809bb..f2dcf79 100644
> --- a/arch/x86/xen/mmu.h
> +++ b/arch/x86/xen/mmu.h
> @@ -13,8 +13,6 @@ enum pt_level {
>
>   bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn);
>
> -void set_pte_mfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags);
> -
>   pte_t xen_ptep_modify_prot_start(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
>   void  xen_ptep_modify_prot_commit(struct mm_struct *mm, unsigned long addr,
>   				  pte_t *ptep, pte_t pte);
>

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