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powerpc: make ALTIVEC select PPC_FPU
On a kernel config with ALTIVEC=y and PPC_FPU not set/enabled, there are build errors: drivers/cpufreq/pmac32-cpufreq.c:262:2: error: implicit declaration of function 'enable_kernel_fp' [-Werror,-Wimplicit-function-declaration] enable_kernel_fp(); ../arch/powerpc/lib/sstep.c: In function 'do_vec_load': ../arch/powerpc/lib/sstep.c:637:3: error: implicit declaration of function 'put_vr' [-Werror=implicit-function-declaration] 637 | put_vr(rn, &u.v); | ^~~~~~ ../arch/powerpc/lib/sstep.c: In function 'do_vec_store': ../arch/powerpc/lib/sstep.c:660:3: error: implicit declaration of function 'get_vr'; did you mean 'get_oc'? [-Werror=implicit-function-declaration] 660 | get_vr(rn, &u.v); | ^~~~~~ In theory ALTIVEC is independent of PPC_FPU but in practice nobody is going to build such a machine, so make ALTIVEC require PPC_FPU by selecting it. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210421210647.20836-1-rdunlap@infradead.org
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@ -308,6 +308,7 @@ config PHYS_64BIT
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config ALTIVEC
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bool "AltiVec Support"
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depends on PPC_BOOK3S_32 || PPC_BOOK3S_64 || (PPC_E500MC && PPC64)
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select PPC_FPU
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help
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This option enables kernel support for the Altivec extensions to the
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PowerPC processor. The kernel currently supports saving and restoring
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