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configure.d: fix detecting and usage of cas_blk_rq_append_bio

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1. When generating cas_blk_rq_append_bio, check whether a
   version with double pointer compiles successfully. This
   is a better criteria than the version with single pointer
   since the latter may compile successfully regardless of
   kernel blk_rq_append_bio prototype.
2. Always provide single pointer to cas_blk_rq_append_bio
   macro - its up to cas_blk_rq_append_bio implementation to
   decide whether extra level of indirection is needed.

This fixes compilation with kernel 4.14.98.

Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>
This commit is contained in:
Adam Rutkowski 2019-07-02 14:40:51 -04:00
parent 3c94734d4e
commit ef223cfd47
2 changed files with 4 additions and 4 deletions
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6
configure.d/1_append_bio.conf
View File

@ -6,11 +6,11 @@
. `dirname $0`/conf_framework
if compile_module "struct bio b;blk_rq_append_bio(NULL, &b)" "linux/blkdev.h"
if compile_module "struct bio *b;blk_rq_append_bio(NULL, &b)" "linux/blkdev.h"
then
add_define "cas_blk_rq_append_bio(rq, bounce_bio) \\
blk_rq_append_bio(rq, bounce_bio)"
blk_rq_append_bio(rq, &bounce_bio)"
else
add_define "cas_blk_rq_append_bio(rq, bounce_bio) \\
blk_rq_append_bio(rq, &bounce_bio)"
blk_rq_append_bio(rq, bounce_bio)"
fi

2
configure.d/2_make_req.conf
View File

@ -28,7 +28,7 @@ static inline struct request *cas_blk_make_request(struct request_queue *q,
struct bio *bounce_bio = bio;
int ret;
cas_blk_queue_bounce(q, &bounce_bio);
ret = cas_blk_rq_append_bio(rq, &bounce_bio);
ret = cas_blk_rq_append_bio(rq, bounce_bio);
if (unlikely(ret)) {
blk_put_request(rq);
return ERR_PTR(ret);