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

[Sunil Mushran]

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 at 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