[openwrt/openwrt] kernel: split kernel version to dedicated files

[LEDE Commits]

rsalvaterra pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/0765466a42f46f7357e260866a4284ed567bb7ad

commit 0765466a42f46f7357e260866a4284ed567bb7ad
Author: Ansuel Smith <ansuelsmth at gmail.com>
AuthorDate: Mon Jan 10 17:02:30 2022 +0100

    kernel: split kernel version to dedicated files
    
    Move the kernel versions and hash to dedicated files.
    This makes kernel bump quicker and fix some annoying
    problem with rebasing when multiple kernel bump are proposed.
    
    Signed-off-by: Ansuel Smith <ansuelsmth at gmail.com>
    [Rebased on top of current master]
    Signed-off-by: Rui Salvaterra <rsalvaterra at gmail.com>
---
 include/kernel-5.10       | 2 ++
 include/kernel-5.4        | 2 ++
 include/kernel-version.mk | 9 +++++----
 3 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/include/kernel-5.10 b/include/kernel-5.10
new file mode 100644
index 0000000000..e816698dec
--- /dev/null
+++ b/include/kernel-5.10
@@ -0,0 +1,2 @@
+LINUX_VERSION-5.10 = .90
+LINUX_KERNEL_HASH-5.10.90 = 945e4264c014a3d9dfc0a4639309dd1ec2fb545416556421f931b95da78c2725
diff --git a/include/kernel-5.4 b/include/kernel-5.4
new file mode 100644
index 0000000000..e85b7ad68e
--- /dev/null
+++ b/include/kernel-5.4
@@ -0,0 +1,2 @@
+LINUX_VERSION-5.4 = .170
+LINUX_KERNEL_HASH-5.4.170 = b09f74e0cf5fc7cf5de6aa932fe654c962cb10118bdbbdddb397022c6e6d382c
diff --git a/include/kernel-version.mk b/include/kernel-version.mk
index 677693ad08..1edb01df27 100644
--- a/include/kernel-version.mk
+++ b/include/kernel-version.mk
@@ -6,11 +6,12 @@ ifdef CONFIG_TESTING_KERNEL
   KERNEL_PATCHVER:=$(KERNEL_TESTING_PATCHVER)
 endif
 
-LINUX_VERSION-5.4 = .170
-LINUX_VERSION-5.10 = .90
+KERNEL_DETAILS_FILE=$(INCLUDE_DIR)/kernel-$(KERNEL_PATCHVER)
+ifeq ($(wildcard $(KERNEL_DETAILS_FILE)),)
+  $(error Missing kernel version/hash file for $(KERNEL_PATCHVER). Please create $(KERNEL_DETAILS_FILE))
+endif
 
-LINUX_KERNEL_HASH-5.4.170 = b09f74e0cf5fc7cf5de6aa932fe654c962cb10118bdbbdddb397022c6e6d382c
-LINUX_KERNEL_HASH-5.10.90 = 945e4264c014a3d9dfc0a4639309dd1ec2fb545416556421f931b95da78c2725
+include $(KERNEL_DETAILS_FILE)
 
 remove_uri_prefix=$(subst git://,,$(subst http://,,$(subst https://,,$(1))))
 sanitize_uri=$(call qstrip,$(subst @,_,$(subst :,_,$(subst .,_,$(subst -,_,$(subst /,_,$(1)))))))