Re: [PATCH] libxfs: turn the xfs_buf_incore stub into an inline function

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On Sun, Jan 26, 2020 at 10:17:17AM +0100, Christoph Hellwig wrote:
> Replace the macro with an inline function to avoid compiler warnings with new
> backports of kernel code.
> 
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>

HAH YES, thank you!!!  <giddy dance>

Reviewed-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>

--D

> ---
>  libxfs/libxfs_priv.h | 14 ++++++--------
>  1 file changed, 6 insertions(+), 8 deletions(-)
> 
> diff --git a/libxfs/libxfs_priv.h b/libxfs/libxfs_priv.h
> index 03edf0d3..2b73963c 100644
> --- a/libxfs/libxfs_priv.h
> +++ b/libxfs/libxfs_priv.h
> @@ -369,14 +369,12 @@ roundup_64(uint64_t x, uint32_t y)
>  #define XFS_BUF_UNDELAYWRITE(bp)	((bp)->b_flags &= ~LIBXFS_B_DIRTY)
>  #define XFS_BUF_SET_BDSTRAT_FUNC(a,b)	((void) 0)
>  
> -/* avoid gcc warning */
> -#define xfs_buf_incore(bt,blkno,len,lockit) ({		\
> -	typeof(blkno) __foo = (blkno);			\
> -	typeof(len) __bar = (len);			\
> -	(blkno) = __foo;				\
> -	(len) = __bar; /* no set-but-unused warning */	\
> -	NULL;						\
> -})
> +static inline struct xfs_buf *xfs_buf_incore(struct xfs_buftarg *target,
> +		xfs_daddr_t blkno, size_t numblks, xfs_buf_flags_t flags)
> +{
> +	return NULL;
> +}
> +
>  #define xfs_buf_relse(bp)		libxfs_putbuf(bp)
>  #define xfs_buf_get(devp,blkno,len)	(libxfs_getbuf((devp), (blkno), (len)))
>  #define xfs_bwrite(bp)			libxfs_writebuf((bp), 0)
> -- 
> 2.24.1
> 



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