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MIPS: paravirt: Fix undefined reference to smp_bootstrap

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If the paravirt machine is compiles without CONFIG_SMP, the following
linker error occurs

arch/mips/kernel/head.o: In function `kernel_entry':
(.ref.text+0x10): undefined reference to `smp_bootstrap'

due to the kernel entry macro always including SMP startup code.
Wrap this code in CONFIG_SMP to fix the error.

Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: stable@vger.kernel.org # 3.16+
Patchwork: https://patchwork.linux-mips.org/patch/14212/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Matt Redfearn 2016-09-05 15:43:40 +01:00 committed by Ralf Baechle
parent b03c1e3b8e
commit 951c39cd3b
1 changed files with 2 additions and 0 deletions
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2
arch/mips/include/asm/mach-paravirt/kernel-entry-init.h
View File

@ -11,11 +11,13 @@
#define CP0_EBASE $15, 1
.macro kernel_entry_setup
#ifdef CONFIG_SMP
mfc0 t0, CP0_EBASE
andi t0, t0, 0x3ff # CPUNum
beqz t0, 1f
# CPUs other than zero goto smp_bootstrap
j smp_bootstrap
#endif /* CONFIG_SMP */
1:
.endm