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# Use the default kernel version if the Makefile doesn't override it
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LINUX_RELEASE?=1
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LINUX_VERSION-3.18 = .71
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LINUX_VERSION-4.4 = .121
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LINUX_VERSION-4.9 = .100
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LINUX_VERSION-4.14 = .41
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LINUX_KERNEL_HASH-3.18.71 = 5abc9778ad44ce02ed6c8ab52ece8a21c6d20d21f6ed8a19287b4a38a50c1240
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LINUX_KERNEL_HASH-4.4.121 = 44a88268b5088dc326b30c9b9133ac35a9a200b636b7268d08f32abeae6ca729
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LINUX_KERNEL_HASH-4.9.100 = c5bb6f3a7113e05cbaf6e48b2b485dea4f7edae5e42b3fe81c963ba63413a77c
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LINUX_KERNEL_HASH-4.14.41 = ccf1147a9b05c986728bc9fa1b407e029c23a16c9f915134dc3f6f8663d8ce6d
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remove_uri_prefix=$(subst git://,,$(subst http://,,$(subst https://,,$(1))))
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sanitize_uri=$(call qstrip,$(subst @,_,$(subst :,_,$(subst .,_,$(subst -,_,$(subst /,_,$(1)))))))
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ifneq ($(call qstrip,$(CONFIG_KERNEL_GIT_CLONE_URI)),)
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LINUX_VERSION:=$(call sanitize_uri,$(call remove_uri_prefix,$(CONFIG_KERNEL_GIT_CLONE_URI)))
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ifeq ($(call qstrip,$(CONFIG_KERNEL_GIT_REF)),)
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CONFIG_KERNEL_GIT_REF:=HEAD
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endif
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LINUX_VERSION:=$(LINUX_VERSION)-$(call sanitize_uri,$(CONFIG_KERNEL_GIT_REF))
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else
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ifdef KERNEL_PATCHVER
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LINUX_VERSION:=$(KERNEL_PATCHVER)$(strip $(LINUX_VERSION-$(KERNEL_PATCHVER)))
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endif
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endif
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split_version=$(subst ., ,$(1))
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merge_version=$(subst $(space),.,$(1))
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KERNEL_BASE=$(firstword $(subst -, ,$(LINUX_VERSION)))
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KERNEL=$(call merge_version,$(wordlist 1,2,$(call split_version,$(KERNEL_BASE))))
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KERNEL_PATCHVER ?= $(KERNEL)
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# disable the md5sum check for unknown kernel versions
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LINUX_KERNEL_HASH:=$(LINUX_KERNEL_HASH-$(strip $(LINUX_VERSION)))
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LINUX_KERNEL_HASH?=x
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