linux-kernel - Re: [PATCH v4 10/12] fs, dax: kill IS

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Date:   Tue, 27 Feb 2018 18:06:29 +0100
From:   Jan Kara <jack@...e.cz>
To:     Dan Williams <dan.j.williams@...el.com>
Cc:     linux-nvdimm@...ts.01.org, Matthew Wilcox <mawilcox@...rosoft.com>,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        linux-mm@...ck.org, Jan Kara <jack@...e.com>,
        linux-fsdevel@...r.kernel.org,
        Ross Zwisler <ross.zwisler@...ux.intel.com>
Subject: Re: [PATCH v4 10/12] fs, dax: kill IS_DAX()

On Mon 26-02-18 20:20:48, Dan Williams wrote:
> In preparation for fixing the broken definition of S_DAX in the
> CONFIG_FS_DAX=n + CONFIG_DEV_DAX=y case, convert all the remaining
> IS_DAX() usages to use explicit tests for FSDAX.
> 
> Cc: Jan Kara <jack@...e.com>
> Cc: Matthew Wilcox <mawilcox@...rosoft.com>
> Cc: Ross Zwisler <ross.zwisler@...ux.intel.com>
> Cc: <stable@...r.kernel.org>
> Fixes: dee410792419 ("/dev/dax, core: file operations and dax-mmap")
> Signed-off-by: Dan Williams <dan.j.williams@...el.com>

Looks good. You can add:

Reviewed-by: Jan Kara <jack@...e.cz>

								Honza

> ---
>  fs/iomap.c          |    2 +-
>  include/linux/dax.h |    2 +-
>  include/linux/fs.h  |    3 +--
>  3 files changed, 3 insertions(+), 4 deletions(-)
> 
> diff --git a/fs/iomap.c b/fs/iomap.c
> index afd163586aa0..fe379d8949fd 100644
> --- a/fs/iomap.c
> +++ b/fs/iomap.c
> @@ -377,7 +377,7 @@ iomap_zero_range_actor(struct inode *inode, loff_t pos, loff_t count,
>  		offset = pos & (PAGE_SIZE - 1); /* Within page */
>  		bytes = min_t(loff_t, PAGE_SIZE - offset, count);
>  
> -		if (IS_DAX(inode))
> +		if (IS_FSDAX(inode))
>  			status = iomap_dax_zero(pos, offset, bytes, iomap);
>  		else
>  			status = iomap_zero(inode, pos, offset, bytes, iomap);
> diff --git a/include/linux/dax.h b/include/linux/dax.h
> index 47edbce4fc52..ce520e932adc 100644
> --- a/include/linux/dax.h
> +++ b/include/linux/dax.h
> @@ -124,7 +124,7 @@ static inline ssize_t dax_iomap_rw(struct kiocb *iocb, struct iov_iter *iter,
>  
>  static inline bool dax_mapping(struct address_space *mapping)
>  {
> -	return mapping->host && IS_DAX(mapping->host);
> +	return mapping->host && IS_FSDAX(mapping->host);
>  }
>  
>  struct writeback_control;
> diff --git a/include/linux/fs.h b/include/linux/fs.h
> index 4a5aa8761011..8021f10068d3 100644
> --- a/include/linux/fs.h
> +++ b/include/linux/fs.h
> @@ -1903,7 +1903,6 @@ static inline bool sb_rdonly(const struct super_block *sb) { return sb->s_flags
>  #define IS_IMA(inode)		((inode)->i_flags & S_IMA)
>  #define IS_AUTOMOUNT(inode)	((inode)->i_flags & S_AUTOMOUNT)
>  #define IS_NOSEC(inode)		((inode)->i_flags & S_NOSEC)
> -#define IS_DAX(inode)		((inode)->i_flags & S_DAX)
>  #define IS_ENCRYPTED(inode)	((inode)->i_flags & S_ENCRYPTED)
>  
>  #define IS_WHITEOUT(inode)	(S_ISCHR(inode->i_mode) && \
> @@ -3203,7 +3202,7 @@ extern int file_update_time(struct file *file);
>  
>  static inline bool io_is_direct(struct file *filp)
>  {
> -	return (filp->f_flags & O_DIRECT) || IS_DAX(filp->f_mapping->host);
> +	return (filp->f_flags & O_DIRECT) || IS_FSDAX(filp->f_mapping->host);
>  }
>  
>  static inline bool vma_is_dax(struct vm_area_struct *vma)
> 
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR