From: Christophe Leroy <christophe.leroy@xxxxxx>
commit 27da80719ef132cf8c80eb406d5aeb37dddf78cc upstream.
The commit identified below adds MC_BTB_FLUSH macro only when
CONFIG_PPC_FSL_BOOK3E is defined. This results in the following error
on some configs (seen several times with kisskb randconfig_defconfig)
arch/powerpc/kernel/exceptions-64e.S:576: Error: Unrecognized opcode: `mc_btb_flush'
make[3]: *** [scripts/Makefile.build:367: arch/powerpc/kernel/exceptions-64e.o] Error 1
make[2]: *** [scripts/Makefile.build:492: arch/powerpc/kernel] Error 2
make[1]: *** [Makefile:1043: arch/powerpc] Error 2
make: *** [Makefile:152: sub-make] Error 2
This patch adds a blank definition of MC_BTB_FLUSH for other cases.
Fixes: 10c5e83afd4a ("powerpc/fsl: Flush the branch predictor at each kernel entry (64bit)")
Cc: Diana Craciun <diana.craciun@xxxxxxx>
Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxx>
Reviewed-by: Daniel Axtens <dja@xxxxxxxxxx>
Reviewed-by: Diana Craciun <diana.craciun@xxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
---
arch/powerpc/kernel/exceptions-64e.S | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/kernel/exceptions-64e.S b/arch/powerpc/kernel/exceptions-64e.S
index 2acd18a903e9..2edc1b7b34cc 100644
--- a/arch/powerpc/kernel/exceptions-64e.S
+++ b/arch/powerpc/kernel/exceptions-64e.S
@@ -348,6 +348,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_EMB_HV)
#define GEN_BTB_FLUSH
#define CRIT_BTB_FLUSH
#define DBG_BTB_FLUSH
+#define MC_BTB_FLUSH
#define GDBELL_BTB_FLUSH
#endif
--
2.20.1
