linux-kernel - Re: [PATCH 3/8] Uprobe: Rename map_info to uprobe_map

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Date:   Tue, 13 Mar 2018 16:39:49 -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 3/8] Uprobe: Rename map_info to uprobe_map_info

On Tue, Mar 13, 2018 at 06:25:58PM +0530, Ravi Bangoria wrote:
> map_info is very generic name, rename it to uprobe_map_info.
> Renaming will help to export this structure outside of the
> file.
> 
> Also rename free_map_info() to uprobe_free_map_info() and
> build_map_info() to uprobe_build_map_info().
> 
> No functionality changes.
> 
> Signed-off-by: Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>

Same coccinelle comments as previously.

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

> ---
>  kernel/events/uprobes.c | 32 +++++++++++++++++---------------
>  1 file changed, 17 insertions(+), 15 deletions(-)
> 
> diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
> index 535fd39..081b88c1 100644
> --- a/kernel/events/uprobes.c
> +++ b/kernel/events/uprobes.c
> @@ -695,27 +695,29 @@ static void delete_uprobe(struct uprobe *uprobe)
>  	put_uprobe(uprobe);
>  }
>  
> -struct map_info {
> -	struct map_info *next;
> +struct uprobe_map_info {
> +	struct uprobe_map_info *next;
>  	struct mm_struct *mm;
>  	unsigned long vaddr;
>  };
>  
> -static inline struct map_info *free_map_info(struct map_info *info)
> +static inline struct uprobe_map_info *
> +uprobe_free_map_info(struct uprobe_map_info *info)
>  {
> -	struct map_info *next = info->next;
> +	struct uprobe_map_info *next = info->next;
>  	kfree(info);
>  	return next;
>  }
>  
> -static struct map_info *
> -build_map_info(struct address_space *mapping, loff_t offset, bool is_register)
> +static struct uprobe_map_info *
> +uprobe_build_map_info(struct address_space *mapping, loff_t offset,
> +		      bool is_register)
>  {
>  	unsigned long pgoff = offset >> PAGE_SHIFT;
>  	struct vm_area_struct *vma;
> -	struct map_info *curr = NULL;
> -	struct map_info *prev = NULL;
> -	struct map_info *info;
> +	struct uprobe_map_info *curr = NULL;
> +	struct uprobe_map_info *prev = NULL;
> +	struct uprobe_map_info *info;
>  	int more = 0;
>  
>   again:
> @@ -729,7 +731,7 @@ static inline struct map_info *free_map_info(struct map_info *info)
>  			 * Needs GFP_NOWAIT to avoid i_mmap_rwsem recursion through
>  			 * reclaim. This is optimistic, no harm done if it fails.
>  			 */
> -			prev = kmalloc(sizeof(struct map_info),
> +			prev = kmalloc(sizeof(struct uprobe_map_info),
>  					GFP_NOWAIT | __GFP_NOMEMALLOC | __GFP_NOWARN);
>  			if (prev)
>  				prev->next = NULL;
> @@ -762,7 +764,7 @@ static inline struct map_info *free_map_info(struct map_info *info)
>  	}
>  
>  	do {
> -		info = kmalloc(sizeof(struct map_info), GFP_KERNEL);
> +		info = kmalloc(sizeof(struct uprobe_map_info), GFP_KERNEL);
>  		if (!info) {
>  			curr = ERR_PTR(-ENOMEM);
>  			goto out;
> @@ -774,7 +776,7 @@ static inline struct map_info *free_map_info(struct map_info *info)
>  	goto again;
>   out:
>  	while (prev)
> -		prev = free_map_info(prev);
> +		prev = uprobe_free_map_info(prev);
>  	return curr;
>  }
>  
> @@ -782,11 +784,11 @@ static inline struct map_info *free_map_info(struct map_info *info)
>  register_for_each_vma(struct uprobe *uprobe, struct uprobe_consumer *new)
>  {
>  	bool is_register = !!new;
> -	struct map_info *info;
> +	struct uprobe_map_info *info;
>  	int err = 0;
>  
>  	percpu_down_write(&dup_mmap_sem);
> -	info = build_map_info(uprobe->inode->i_mapping,
> +	info = uprobe_build_map_info(uprobe->inode->i_mapping,
>  					uprobe->offset, is_register);
>  	if (IS_ERR(info)) {
>  		err = PTR_ERR(info);
> @@ -825,7 +827,7 @@ static inline struct map_info *free_map_info(struct map_info *info)
>  		up_write(&mm->mmap_sem);
>   free:
>  		mmput(mm);
> -		info = free_map_info(info);
> +		info = uprobe_free_map_info(info);
>  	}
>   out:
>  	percpu_up_write(&dup_mmap_sem);
> -- 
> 1.8.3.1
>