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arm, kbuild: make "make install" not depend on vmlinux
Install targets (install, zinstall, uinstall) on arm have a dependency
to vmlinux. This may cause parts of the kernel to be rebuilt during
installation. We must avoid this since this may run as root. Install
targets "ABSOLUTELY MUST NOT MODIFY THE SOURCE TREE." as Linus
emphasized this in:
http://lkml.org/lkml/2013/7/10/600
So on arm and maybe other archs we need the same as for x86:
1648e4f8
x86, kbuild: make "make install" not depend on vmlinux
This patch fixes this for arm. Dependencies are removed and instead a
check to install.sh is added for the files that are needed.
This issue was uncovered by this build error where the -j option is
used in conjunction with install targets:
$ make <makeflags>
$ make <makeflags> zinstall
...
DEPMOD
Usage: .../scripts/depmod.sh /sbin/depmod <kernelrelease>
(INSTALL_MOD_PATH and INSTALL_PATH variables set, so no root perms
required in this case.)
The problem is that zinstall on arm due to its dependency to vmlinux
does a prepare/prepare3 and finally does a forced rewrite of
kernel.release even if it exists already.
Rebuilding kernel.release removes it first and then recreates it. This
might race with another parallel make job running depmod.
So this patch should fix this one too.
Also quoting $(KERNELRELEASE) arg for install.sh as this messes
argument order in case it is empty (which is the case if the kernel
was not built yet).
Signed-off-by: Robert Richter <robert.richter@linaro.org>
Signed-off-by: Robert Richter <rric@kernel.org>
Acked-by: Michal Marek <mmarek@suse.cz>.
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Michal Marek <mmarek@suse.cz>
This commit is contained in:
parent
272b98c645
commit
19514fc665
@ -296,10 +296,15 @@ archprepare:
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# Convert bzImage to zImage
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# Convert bzImage to zImage
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bzImage: zImage
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bzImage: zImage
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zImage Image xipImage bootpImage uImage: vmlinux
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BOOT_TARGETS = zImage Image xipImage bootpImage uImage
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INSTALL_TARGETS = zinstall uinstall install
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PHONY += bzImage $(BOOT_TARGETS) $(INSTALL_TARGETS)
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$(BOOT_TARGETS): vmlinux
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$(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/$@
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$(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/$@
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zinstall uinstall install: vmlinux
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$(INSTALL_TARGETS):
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$(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $@
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$(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $@
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%.dtb: | scripts
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%.dtb: | scripts
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@ -95,24 +95,24 @@ initrd:
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@test "$(INITRD)" != "" || \
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@test "$(INITRD)" != "" || \
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(echo You must specify INITRD; exit -1)
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(echo You must specify INITRD; exit -1)
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install: $(obj)/Image
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install:
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$(CONFIG_SHELL) $(srctree)/$(src)/install.sh $(KERNELRELEASE) \
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$(CONFIG_SHELL) $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" \
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$(obj)/Image System.map "$(INSTALL_PATH)"
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$(obj)/Image System.map "$(INSTALL_PATH)"
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zinstall: $(obj)/zImage
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zinstall:
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$(CONFIG_SHELL) $(srctree)/$(src)/install.sh $(KERNELRELEASE) \
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$(CONFIG_SHELL) $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" \
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$(obj)/zImage System.map "$(INSTALL_PATH)"
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$(obj)/zImage System.map "$(INSTALL_PATH)"
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uinstall: $(obj)/uImage
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uinstall:
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$(CONFIG_SHELL) $(srctree)/$(src)/install.sh $(KERNELRELEASE) \
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$(CONFIG_SHELL) $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" \
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$(obj)/uImage System.map "$(INSTALL_PATH)"
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$(obj)/uImage System.map "$(INSTALL_PATH)"
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zi:
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zi:
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$(CONFIG_SHELL) $(srctree)/$(src)/install.sh $(KERNELRELEASE) \
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$(CONFIG_SHELL) $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" \
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$(obj)/zImage System.map "$(INSTALL_PATH)"
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$(obj)/zImage System.map "$(INSTALL_PATH)"
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i:
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i:
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$(CONFIG_SHELL) $(srctree)/$(src)/install.sh $(KERNELRELEASE) \
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$(CONFIG_SHELL) $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" \
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$(obj)/Image System.map "$(INSTALL_PATH)"
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$(obj)/Image System.map "$(INSTALL_PATH)"
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subdir- := bootp compressed dts
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subdir- := bootp compressed dts
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@ -20,6 +20,20 @@
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# $4 - default install path (blank if root directory)
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# $4 - default install path (blank if root directory)
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#
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#
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verify () {
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if [ ! -f "$1" ]; then
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echo "" 1>&2
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echo " *** Missing file: $1" 1>&2
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echo ' *** You need to run "make" before "make install".' 1>&2
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echo "" 1>&2
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exit 1
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fi
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}
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# Make sure the files actually exist
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verify "$2"
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verify "$3"
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# User may have a custom install script
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# User may have a custom install script
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if [ -x ~/bin/${INSTALLKERNEL} ]; then exec ~/bin/${INSTALLKERNEL} "$@"; fi
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if [ -x ~/bin/${INSTALLKERNEL} ]; then exec ~/bin/${INSTALLKERNEL} "$@"; fi
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if [ -x /sbin/${INSTALLKERNEL} ]; then exec /sbin/${INSTALLKERNEL} "$@"; fi
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if [ -x /sbin/${INSTALLKERNEL} ]; then exec /sbin/${INSTALLKERNEL} "$@"; fi
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