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# Use the default kernel version if the Makefile doesn't override it
LINUX_RELEASE?=1
LINUX_VERSION-3.18 = .135
LINUX_VERSION-4.9 = .159
LINUX_VERSION-4.14 = .102
LINUX_VERSION-4.19 = .23
LINUX_KERNEL_HASH-3.18.135 = d1853eb6e5438abb0b54d11478c0792554e39325d37a3f04b68f6c151ed8f8eb
LINUX_KERNEL_HASH-4.9.159 = 9f9df13168a090d12314e2e8dac040e71ce3f2ed89eafbece2b14dabb6771742
LINUX_KERNEL_HASH-4.14.102 = d8a982cfa2804edc2ae9d20792ab0e3897f3976ced5632f2392c2e1918562501
LINUX_KERNEL_HASH-4.19.23 = 2d9b25678aac7f3f109c52e6266fb6ee89cc424b597518a2875874bacb8f130a
remove_uri_prefix=$(subst git://,,$(subst http://,,$(subst https://,,$(1))))
sanitize_uri=$(call qstrip,$(subst @,_,$(subst :,_,$(subst .,_,$(subst -,_,$(subst /,_,$(1)))))))
ifneq ($(call qstrip,$(CONFIG_KERNEL_GIT_CLONE_URI)),)
LINUX_VERSION:=$(call sanitize_uri,$(call remove_uri_prefix,$(CONFIG_KERNEL_GIT_CLONE_URI)))
ifeq ($(call qstrip,$(CONFIG_KERNEL_GIT_REF)),)
CONFIG_KERNEL_GIT_REF:=HEAD
endif
LINUX_VERSION:=$(LINUX_VERSION)-$(call sanitize_uri,$(CONFIG_KERNEL_GIT_REF))
else
ifdef KERNEL_PATCHVER
LINUX_VERSION:=$(KERNEL_PATCHVER)$(strip $(LINUX_VERSION-$(KERNEL_PATCHVER)))
endif
endif
split_version=$(subst ., ,$(1))
merge_version=$(subst $(space),.,$(1))
KERNEL_BASE=$(firstword $(subst -, ,$(LINUX_VERSION)))
KERNEL=$(call merge_version,$(wordlist 1,2,$(call split_version,$(KERNEL_BASE))))
KERNEL_PATCHVER ?= $(KERNEL)
# disable the md5sum check for unknown kernel versions
LINUX_KERNEL_HASH:=$(LINUX_KERNEL_HASH-$(strip $(LINUX_VERSION)))
LINUX_KERNEL_HASH?=x
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