linux-kernel - Re: [PATCH 2/8] mm: Prefix vma_ to vaddr_to_offset() and offset_to

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Date:   Tue, 13 Mar 2018 16:38:59 -0400
From:   Jerome Glisse <jglisse@...hat.com>
To:     Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
Cc:     mhiramat@...nel.org, oleg@...hat.com, peterz@...radead.org,
        srikar@...ux.vnet.ibm.com, acme@...nel.org,
        ananth@...ux.vnet.ibm.com, akpm@...ux-foundation.org,
        alexander.shishkin@...ux.intel.com, alexis.berlemont@...il.com,
        corbet@....net, dan.j.williams@...el.com,
        gregkh@...uxfoundation.org, huawei.libin@...wei.com,
        hughd@...gle.com, jack@...e.cz, jolsa@...hat.com,
        kan.liang@...el.com, kirill.shutemov@...ux.intel.com,
        kjlx@...pleofstupid.com, kstewart@...uxfoundation.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, mhocko@...e.com, milian.wolff@...b.com,
        mingo@...hat.com, namhyung@...nel.org,
        naveen.n.rao@...ux.vnet.ibm.com, pc@...ibm.com,
        pombredanne@...b.com, rostedt@...dmis.org, tglx@...utronix.de,
        tmricht@...ux.vnet.ibm.com, willy@...radead.org,
        yao.jin@...ux.intel.com, fengguang.wu@...el.com
Subject: Re: [PATCH 2/8] mm: Prefix vma_ to vaddr_to_offset() and
 offset_to_vaddr()

On Tue, Mar 13, 2018 at 06:25:57PM +0530, Ravi Bangoria wrote:
> No functionality changes.
> 
> Signed-off-by: Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>

Doing this with coccinelle would have been nicer but this is small
enough to review without too much fatigue :)

Reviewed-by: Jérôme Glisse <jglisse@...hat.com>

> ---
>  include/linux/mm.h      |  4 ++--
>  kernel/events/uprobes.c | 14 +++++++-------
>  2 files changed, 9 insertions(+), 9 deletions(-)
> 
> diff --git a/include/linux/mm.h b/include/linux/mm.h
> index 95909f2..d7ee526 100644
> --- a/include/linux/mm.h
> +++ b/include/linux/mm.h
> @@ -2275,13 +2275,13 @@ struct vm_unmapped_area_info {
>  }
>  
>  static inline unsigned long
> -offset_to_vaddr(struct vm_area_struct *vma, loff_t offset)
> +vma_offset_to_vaddr(struct vm_area_struct *vma, loff_t offset)
>  {
>  	return vma->vm_start + offset - ((loff_t)vma->vm_pgoff << PAGE_SHIFT);
>  }
>  
>  static inline loff_t
> -vaddr_to_offset(struct vm_area_struct *vma, unsigned long vaddr)
> +vma_vaddr_to_offset(struct vm_area_struct *vma, unsigned long vaddr)
>  {
>  	return ((loff_t)vma->vm_pgoff << PAGE_SHIFT) + (vaddr - vma->vm_start);
>  }
> diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
> index bd6f230..535fd39 100644
> --- a/kernel/events/uprobes.c
> +++ b/kernel/events/uprobes.c
> @@ -748,7 +748,7 @@ static inline struct map_info *free_map_info(struct map_info *info)
>  		curr = info;
>  
>  		info->mm = vma->vm_mm;
> -		info->vaddr = offset_to_vaddr(vma, offset);
> +		info->vaddr = vma_offset_to_vaddr(vma, offset);
>  	}
>  	i_mmap_unlock_read(mapping);
>  
> @@ -807,7 +807,7 @@ static inline struct map_info *free_map_info(struct map_info *info)
>  			goto unlock;
>  
>  		if (vma->vm_start > info->vaddr ||
> -		    vaddr_to_offset(vma, info->vaddr) != uprobe->offset)
> +		    vma_vaddr_to_offset(vma, info->vaddr) != uprobe->offset)
>  			goto unlock;
>  
>  		if (is_register) {
> @@ -977,7 +977,7 @@ static int unapply_uprobe(struct uprobe *uprobe, struct mm_struct *mm)
>  		    uprobe->offset >= offset + vma->vm_end - vma->vm_start)
>  			continue;
>  
> -		vaddr = offset_to_vaddr(vma, uprobe->offset);
> +		vaddr = vma_offset_to_vaddr(vma, uprobe->offset);
>  		err |= remove_breakpoint(uprobe, mm, vaddr);
>  	}
>  	up_read(&mm->mmap_sem);
> @@ -1023,7 +1023,7 @@ static void build_probe_list(struct inode *inode,
>  	struct uprobe *u;
>  
>  	INIT_LIST_HEAD(head);
> -	min = vaddr_to_offset(vma, start);
> +	min = vma_vaddr_to_offset(vma, start);
>  	max = min + (end - start) - 1;
>  
>  	spin_lock(&uprobes_treelock);
> @@ -1076,7 +1076,7 @@ int uprobe_mmap(struct vm_area_struct *vma)
>  	list_for_each_entry_safe(uprobe, u, &tmp_list, pending_list) {
>  		if (!fatal_signal_pending(current) &&
>  		    filter_chain(uprobe, UPROBE_FILTER_MMAP, vma->vm_mm)) {
> -			unsigned long vaddr = offset_to_vaddr(vma, uprobe->offset);
> +			unsigned long vaddr = vma_offset_to_vaddr(vma, uprobe->offset);
>  			install_breakpoint(uprobe, vma->vm_mm, vma, vaddr);
>  		}
>  		put_uprobe(uprobe);
> @@ -1095,7 +1095,7 @@ int uprobe_mmap(struct vm_area_struct *vma)
>  
>  	inode = file_inode(vma->vm_file);
>  
> -	min = vaddr_to_offset(vma, start);
> +	min = vma_vaddr_to_offset(vma, start);
>  	max = min + (end - start) - 1;
>  
>  	spin_lock(&uprobes_treelock);
> @@ -1730,7 +1730,7 @@ static struct uprobe *find_active_uprobe(unsigned long bp_vaddr, int *is_swbp)
>  	if (vma && vma->vm_start <= bp_vaddr) {
>  		if (valid_vma(vma, false)) {
>  			struct inode *inode = file_inode(vma->vm_file);
> -			loff_t offset = vaddr_to_offset(vma, bp_vaddr);
> +			loff_t offset = vma_vaddr_to_offset(vma, bp_vaddr);
>  
>  			uprobe = find_uprobe(inode, offset);
>  		}
> -- 
> 1.8.3.1
>