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# Use the default kernel version if the Makefile doesn't override it
LINUX_RELEASE?=1
LINUX_VERSION-3.18 = .134
LINUX_VERSION-4.9 = .155
LINUX_VERSION-4.14 = .97
LINUX_VERSION-4.19 = .19
LINUX_KERNEL_HASH-3.18.134 = 36bdd04cab3b6c824a4b7e32ae02503f437e0916d5a4ff04c90aa22da2749c2f
LINUX_KERNEL_HASH-4.9.155 = a52ac60be33c0fe312d99361f8e30211599956e958ba415d93194c6c9d073c9d
LINUX_KERNEL_HASH-4.14.97 = 8dd2c831ddabfc6241ddca946e600376785fd6f225a24655bc36a0c6b4e945f4
LINUX_KERNEL_HASH-4.19.19 = 99afcaf670479d696eb039e8e0a074988a44d5bd159a9cda5bff214e824669bd
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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