File bsc-1201335_02-compat-only-apply-bdi-pointer-pa... of Package drbd

Overview Repositories Revisions Requests Users Attributes Meta

File bsc-1201335_02-compat-only-apply-bdi-pointer-patch-if-bdi-is-in-req.patch of Package drbd

From eacd74206a8f48c3861de2096215790426331237 Mon Sep 17 00:00:00 2001
From: <christoph.boehmwalder@linbit.com>
Date: Wed, 6 Apr 2022 13:36:08 +0200
Subject: [PATCH] compat: only apply bdi pointer patch if bdi is in
 request_queue

The history is as follows:

1. In the beginning, request_queue.backing_dev_info was a regular member
2. Then, backing_dev_info became a pointer
3. Now the backing_dev_info pointer has moved to gendisk.bdi

So there is never a case where gendisk has a non-pointer
backing_dev_info. Thus, we only want to apply the pointer patch for old
kernels where backing_dev_info was still in request_queue.
---
 drbd/drbd-kernel-compat/gen_patch_names.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drbd/drbd-kernel-compat/gen_patch_names.c b/drbd/drbd-kernel-compat/gen_patch_names.c
index 9210d2c2eeb9..763652a8908b 100644
--- a/drbd/drbd-kernel-compat/gen_patch_names.c
+++ b/drbd/drbd-kernel-compat/gen_patch_names.c
@@ -400,8 +400,10 @@ int main(int argc, char **argv)
 	patch(1, "struct_gendisk", true, false,
 	      COMPAT_STRUCT_GENDISK_HAS_BACKING_DEV_INFO, "has_backing_dev_info");
 
+#if !defined(COMPAT_STRUCT_GENDISK_HAS_BACKING_DEV_INFO)
 	patch(1, "backing_dev_info", true, false,
 	      COMPAT_HAVE_POINTER_BACKING_DEV_INFO, "is_pointer");
+#endif
 
 	patch(1, "sendpage_ok", true, false,
 	      COMPAT_HAVE_SENDPAGE_OK, "present");
-- 
2.34.1

Places

File bsc-1201335_02-compat-only-apply-bdi-pointer-patch-if-bdi-is-in-req.patch of Package drbd

Places