[PATCH] MIPS: launch.h: add include guard to prevent build errors

From: Randy Dunlap
Date: Fri May 21 2021 - 01:13:49 EST


arch/mips/include/asm/mips-boards/launch.h needs an include guard
to prevent it from being #included more than once.
Prevents these build errors:

In file included from ../arch/mips/mti-malta/malta-amon.c:16:
../arch/mips/include/asm/mips-boards/launch.h:8:8: error: redefinition of 'struct cpulaunch'
8 | struct cpulaunch {
| ^~~~~~~~~
In file included from ../arch/mips/include/asm/mips-cps.h:13,
from ../arch/mips/include/asm/smp-ops.h:16,
from ../arch/mips/include/asm/smp.h:21,
from ../include/linux/smp.h:114,
from ../arch/mips/mti-malta/malta-amon.c:12:
../arch/mips/include/asm/mips-boards/launch.h:8:8: note: originally defined here
8 | struct cpulaunch {
| ^~~~~~~~~
make[3]: [../scripts/Makefile.build:273: arch/mips/mti-malta/malta-amon.o] Error 1 (ignored)

Fixes: 6decd1aad15f ("MIPS: add support for buggy MT7621S core detection")
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Cc: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
Cc: linux-mips@xxxxxxxxxxxxxxx
Cc: Ilya Lipnitskiy <ilya.lipnitskiy@xxxxxxxxx>
---
arch/mips/include/asm/mips-boards/launch.h | 5 +++++
1 file changed, 5 insertions(+)

--- linux-next-20210520.orig/arch/mips/include/asm/mips-boards/launch.h
+++ linux-next-20210520/arch/mips/include/asm/mips-boards/launch.h
@@ -3,6 +3,9 @@
*
*/

+#ifndef _ASM_MIPS_BOARDS_LAUNCH_H
+#define _ASM_MIPS_BOARDS_LAUNCH_H
+
#ifndef _ASSEMBLER_

struct cpulaunch {
@@ -34,3 +37,5 @@ struct cpulaunch {

/* Polling period in count cycles for secondary CPU's */
#define LAUNCHPERIOD 10000
+
+#endif /* _ASM_MIPS_BOARDS_LAUNCH_H */