From: Michael Ellerman mpe@ellerman.id.au
commit 0c83b277ada72b585e6a3e52b067669df15bcedb upstream.
Recently random.h started including percpu.h (see commit f227e3ec3b5c ("random32: update the net random state on interrupt and activity")), which broke corenet64_smp_defconfig:
In file included from /linux/arch/powerpc/include/asm/paca.h:18, from /linux/arch/powerpc/include/asm/percpu.h:13, from /linux/include/linux/random.h:14, from /linux/lib/uuid.c:14: /linux/arch/powerpc/include/asm/mmu.h:139:22: error: unknown type name 'next_tlbcam_idx' 139 | DECLARE_PER_CPU(int, next_tlbcam_idx);
This is due to a circular header dependency: asm/mmu.h includes asm/percpu.h, which includes asm/paca.h, which includes asm/mmu.h
Which means DECLARE_PER_CPU() isn't defined when mmu.h needs it.
We can fix it by moving the include of paca.h below the include of asm-generic/percpu.h.
This moves the include of paca.h out of the #ifdef __powerpc64__, but that is OK because paca.h is almost entirely inside #ifdef CONFIG_PPC64 anyway.
It also moves the include of paca.h out of the #ifdef CONFIG_SMP, which could possibly break something, but seems to have no ill effects.
Fixes: f227e3ec3b5c ("random32: update the net random state on interrupt and activity") Cc: stable@vger.kernel.org # v5.8 Reported-by: Stephen Rothwell sfr@canb.auug.org.au Signed-off-by: Michael Ellerman mpe@ellerman.id.au Link: https://lore.kernel.org/r/20200804130558.292328-1-mpe@ellerman.id.au Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/powerpc/include/asm/percpu.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/powerpc/include/asm/percpu.h +++ b/arch/powerpc/include/asm/percpu.h @@ -9,8 +9,6 @@
#ifdef CONFIG_SMP
-#include <asm/paca.h> - #define __my_cpu_offset local_paca->data_offset
#endif /* CONFIG_SMP */ @@ -18,4 +16,6 @@
#include <asm-generic/percpu.h>
+#include <asm/paca.h> + #endif /* _ASM_POWERPC_PERCPU_H_ */