4.19-stable review patch. If anyone has any objections, please let me know.
------------------
From: Christophe Leroy <christophe.le...@c-s.fr>
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.crac...@nxp.com>
Signed-off-by: Christophe Leroy <christophe.le...@c-s.fr>
Reviewed-by: Daniel Axtens <d...@axtens.net>
Reviewed-by: Diana Craciun <diana.crac...@nxp.com>
Signed-off-by: Michael Ellerman <m...@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
arch/powerpc/kernel/exceptions-64e.S | 1 +
1 file changed, 1 insertion(+)
--- a/arch/powerpc/kernel/exceptions-64e.S
+++ b/arch/powerpc/kernel/exceptions-64e.S
@@ -349,6 +349,7 @@ ret_from_mc_except:
#define GEN_BTB_FLUSH
#define CRIT_BTB_FLUSH
#define DBG_BTB_FLUSH
+#define MC_BTB_FLUSH
#define GDBELL_BTB_FLUSH
#endif
