[Ocfs2-devel] [PATCH 29/30] ocfs2: Handle older prototype of bi_end_io_t

[Joel Becker <Joel.Becker@oracle.com>]

On Thu, Dec 20, 2007 at 03:29:46PM -0800, Sunil Mushran wrote:
> Commit 6712ecf8f648118c3363c142196418f89a510b90 in mainline
> dropped 'size' argument from bi_end_io(). This patch allows
> one to build ocfs2 with kernels having/not having this change.
> 
> Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>

Signed-off-by: Joel Becker <joel.becker@oracle.com>

> ---
>  Config.make.in               |    1 +
>  configure.in                 |    5 +++++
>  fs/ocfs2/cluster/Makefile    |    4 ++++
>  fs/ocfs2/cluster/heartbeat.c |    9 +++++++++
>  4 files changed, 19 insertions(+), 0 deletions(-)
> 
> diff --git a/Config.make.in b/Config.make.in
> index 89c1e94..f22473c 100644
> --- a/Config.make.in
> +++ b/Config.make.in
> @@ -73,6 +73,7 @@ SOP_IS_CONST = @SOP_IS_CONST@
>  IOP_IS_CONST = @IOP_IS_CONST@
>  VECTORED_FILE_AIO = @VECTORED_FILE_AIO@
>  SPLICE_FROM_PIPE = @SPLICE_FROM_PIPE@
> +OLD_BIO_END_IO = @OLD_BIO_END_IO@
>  
>  OCFS_DEBUG = @OCFS_DEBUG@
>  
> diff --git a/configure.in b/configure.in
> index 021b925..60fd68f 100644
> --- a/configure.in
> +++ b/configure.in
> @@ -292,6 +292,11 @@ OCFS2_CHECK_KERNEL([__splice_from_pipe() in splice.h], splice.h,
>    SPLICE_FROM_PIPE=yes, , [^extern ssize_t __splice_from_pipe(struct pipe_inode_info \*])
>  AC_SUBST(SPLICE_FROM_PIPE)
>  
> +OLD_BIO_END_IO=
> +OCFS2_CHECK_KERNEL([old bio_end_io_t in bio.h], bio.h,
> +  OLD_BIO_END_IO=yes, , [^typedef int (bio_end_io_t) (struct bio \*, unsigned int, int);])
> +AC_SUBST(OLD_BIO_END_IO)
> +
>  # using -include has two advantages:
>  #  the source doesn't need to know to include compat headers
>  #  the compat header file names don't go through the search path
> diff --git a/fs/ocfs2/cluster/Makefile b/fs/ocfs2/cluster/Makefile
> index ff57486..ccbddd0 100644
> --- a/fs/ocfs2/cluster/Makefile
> +++ b/fs/ocfs2/cluster/Makefile
> @@ -29,6 +29,10 @@ ifdef STRUCT_SUBSYSTEM_DEFINED
>  EXTRA_CFLAGS += -DSTRUCT_SUBSYSTEM_DEFINED
>  endif
>  
> +ifdef OLD_BIO_END_IO
> +EXTRA_CFLAGS += -DOLD_BIO_END_IO
> +endif
> +
>  SOURCES =			\
>  	heartbeat.c		\
>  	masklog.c		\
> diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
> index e610665..b41a7fb 100644
> --- a/fs/ocfs2/cluster/heartbeat.c
> +++ b/fs/ocfs2/cluster/heartbeat.c
> @@ -216,8 +216,14 @@ static void o2hb_wait_on_io(struct o2hb_region *reg,
>  	wait_for_completion(&wc->wc_io_complete);
>  }
>  
> +#ifdef OLD_BIO_END_IO
> +static int o2hb_bio_end_io(struct bio *bio,
> +			   unsigned int bytes_done,
> +			   int error)
> +#else
>  static void o2hb_bio_end_io(struct bio *bio,
>  			   int error)
> +#endif
>  {
>  	struct o2hb_bio_wait_ctxt *wc = bio->bi_private;
>  
> @@ -228,6 +234,9 @@ static void o2hb_bio_end_io(struct bio *bio,
>  
>  	o2hb_bio_wait_dec(wc, 1);
>  	bio_put(bio);
> +#ifdef OLD_BIO_END_IO
> +	return 0;
> +#endif
>  }
>  
>  /* Setup a Bio to cover I/O against num_slots slots starting at
> -- 
> 1.5.2.5
> 
> 
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-- 

Viro's Razor:
	Any race condition, no matter how unlikely, will occur just
	often enough to bite you.

Joel Becker
Principal Software Developer
Oracle
E-mail: joel.becker@oracle.com
Phone: (650) 506-8127