From: Michael Ellerman mpe@ellerman.id.au
[ Upstream commit 4ee812f6143d78d8ba1399671d78c8d78bf2817c ]
In the vmx crypto Makefile we assign to a variable called TARGET and pass that to the aesp8-ppc.pl and ghashp8-ppc.pl scripts.
The variable is meant to describe what flavour of powerpc we're building for, eg. either 32 or 64-bit, and big or little endian.
Unfortunately TARGET is a fairly common name for a make variable, and if it happens that TARGET is specified as a command line parameter to make, the value specified on the command line will override our value.
In particular this can happen if the kernel Makefile is driven by an external Makefile that uses TARGET for something.
This leads to weird build failures, eg: nonsense at /build/linux/drivers/crypto/vmx/ghashp8-ppc.pl line 45. /linux/drivers/crypto/vmx/Makefile:20: recipe for target 'drivers/crypto/vmx/ghashp8-ppc.S' failed
Which shows that we passed an empty value for $(TARGET) to the perl script, confirmed with make V=1:
perl /linux/drivers/crypto/vmx/ghashp8-ppc.pl > drivers/crypto/vmx/ghashp8-ppc.S
We can avoid this confusion by using override, to tell make that we don't want anything to override our variable, even a value specified on the command line. We can also use a less common name, given the script calls it "flavour", let's use that.
Signed-off-by: Michael Ellerman mpe@ellerman.id.au Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- drivers/crypto/vmx/Makefile | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/crypto/vmx/Makefile b/drivers/crypto/vmx/Makefile index cab32cf..709670d 100644 --- a/drivers/crypto/vmx/Makefile +++ b/drivers/crypto/vmx/Makefile @@ -3,13 +3,13 @@ obj-$(CONFIG_CRYPTO_DEV_VMX_ENCRYPT) += vmx-crypto.o vmx-crypto-objs := vmx.o aesp8-ppc.o ghashp8-ppc.o aes.o aes_cbc.o aes_ctr.o aes_xts.o ghash.o
ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y) -TARGET := linux-ppc64le +override flavour := linux-ppc64le else -TARGET := linux-ppc64 +override flavour := linux-ppc64 endif
quiet_cmd_perl = PERL $@ - cmd_perl = $(PERL) $(<) $(TARGET) > $(@) + cmd_perl = $(PERL) $(<) $(flavour) > $(@)
targets += aesp8-ppc.S ghashp8-ppc.S