[Scst-svn] [master] scst_lib: Port to Linux kernel v6.18

[Gleb C. <lna...@ya...>]

Commit: 6c73cc8
GitHub URL: https://github.com/SCST-project/scst/commit/6c73cc8d2ffb412c0c4173c39a2064510b1c9f24
Author: Ameer Hamza
Date: 2025-10-30T11:02:08+03:00
Log Message:
-----------
scst_lib: Port to Linux kernel v6.18

Support for the following block layer and memory management changes in
the Linux kernel v6.18:

  - d86eaa0f3c56 ("block: remove the bi_inline_vecs variable sized array
    from struct bio")
  - 84efbefa26df ("mm: remove nth_page()")

Modified Paths:
--------------
 scst/src/scst_lib.c | 17 ++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

===================================================================
diff --git a/scst/src/scst_lib.c b/scst/src/scst_lib.c
index 6b48030..d3fdd2d 100644
--- a/scst/src/scst_lib.c
+++ b/scst/src/scst_lib.c
@@ -8369,12 +8369,19 @@ scst_alloc_bio(unsigned short nr_vecs, gfp_t gfp_mask)
 	/*
 	 * See also commit 066ff571011d ("block: turn bio_kmalloc into a
 	 * simple kmalloc wrapper").
+	 * See also commit d86eaa0f3c56 ("block: remove the bi_inline_vecs
+	 * variable sized array from struct bio") # v6.18.
 	 */
 	struct bio *bio;
 
 	bio = bio_kmalloc(nr_vecs, gfp_mask);
-	if (bio)
+	if (bio) {
+#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 18, 0)
 		bio_init(bio, NULL, bio->bi_inline_vecs, nr_vecs, 0);
+#else
+		bio_init(bio, NULL, bio_inline_vecs(bio), nr_vecs, 0);
+#endif
+	}
 
 	return bio;
 #endif
@@ -8575,7 +8582,15 @@ static struct request *__blk_map_kern_sg(struct request_queue *q,
 				need_new_bio = false;
 				offset = 0;
 				len -= bytes;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 18, 0)
 				page = nth_page(page, 1);
+#else
+				/*
+				 * See also commit 84efbefa26df ("mm: remove nth_page()") # v6.18.
+				 * Use simple pointer arithmetic for contiguous pages.
+				 */
+				page = page + 1;
+#endif
 			}
 		}
 	}