Rename variable 'LINUX' to 'KERNELSRC'

Variable name 'LINUX' is very ambiguous for its purpose in the makefile.
Also, this project builds as a part of COHT project which uses another
variable name 'KERNELSRC' for the same purpose. Hence, this change makes
this project uniform with others.

Signed-off-by: Vaibhav Gupta <vaibhav.gupta@cern.ch>

.gitlab-ci.yml

@@ -35,7 +35,7 @@ build:
   stage: build
   script:
     - yum install -y kernel-devel
-    - LINUX=/usr/src/kernels/*/ make modules
+    - KERNELSRC=/usr/src/kernels/*/ make modules
 
 build_dkms_rpm:
   stage: dkms
@@ -47,7 +47,7 @@ build_srpm:
   stage: srpm
   script:
     - yum-builddep -y ${DIST_PATH}/*.spec
-    - LINUX=/usr/src/kernels/*/ make -C distribution srpm
+    - KERNELSRC=/usr/src/kernels/*/ make -C distribution srpm
   artifacts:
     paths:
       - distribution/build/SRPMS/${CI_PROJECT_NAME}*src.rpm

Documentation/fmc/Makefile

@@ -7,7 +7,7 @@
 # REPO_PARENT ?=
 # -include $(REPO_PARENT)/parent_common.mk
 
-LINUX ?= /lib/modules/$(shell uname -r)/build
+KERNELSRC ?= /lib/modules/$(shell uname -r)/build
 
 SPHINXOPTS    = -Drelease=$(shell git describe) -Dversion=$(shell git describe | cut -d "-" -f 1 | tr -d "v")
 SPHINXBUILD   ?= sphinx-build
@@ -23,4 +23,4 @@ help:
 # Catch-all target: route all unknown targets to Sphinx using the new
 # "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
 %: Makefile
-	LINUX=$(LINUX) $(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+	KERNELSRC=$(KERNELSRC) $(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)

Documentation/fmc/conf.py

@@ -16,9 +16,9 @@ import sphinx
 # the Docs). In a normal build, these are supplied from the Makefile via command
 # line arguments.
 
-linux = os.getenv("LINUX", None)
+linux = os.getenv("KERNELSRC", None)
 if linux is None:
-    raise Exception("Missing LINUX environment variable")
+    raise Exception("Missing KERNELSRC environment variable")
 
 kerneldoc_bin = os.path.join(linux, 'scripts/kernel-doc')
 kerneldoc_srctree = '../../'

drivers/fmc/Makefile

@@ -8,13 +8,13 @@
 REPO_PARENT ?= $(shell /bin/pwd)/../..
 -include $(REPO_PARENT)/parent_common.mk
 
-LINUX ?= /lib/modules/$(shell uname -r)/build
+KERNELSRC ?= /lib/modules/$(shell uname -r)/build
 
 export CONFIG_FMC=m
 
 all: modules
 
 clean modules help modules_install coccicheck:
-	make -C $(LINUX) M=$(shell pwd) $@
+	make -C $(KERNELSRC) M=$(shell pwd) $@
 
 .PHONY: all modules clean help install modules_install