3.16.61-rc1 review patch. If anyone has any objections, please let me know.
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From: Michael Jeanson mjeanson@efficios.com
commit 69a8405999aa1c489de4b8d349468f0c2b83f093 upstream.
In binutils 2.26 a new opcode for the "wait" instruction was added for the POWER9 and has precedence over the one specific to the e500mc. Commit ebf714ff3756 ("powerpc/e500mc: Add support for the wait instruction in e500_idle") uses this instruction specifically on the e500mc to work around an erratum.
This results in an invalid instruction in idle_e500 when we build for the e500mc on bintutils >= 2.26 with the default assembler machine type.
Since multiplatform between e500 and non-e500 is not supported, set the assembler machine type globaly when CONFIG_PPC_E500MC=y.
Signed-off-by: Michael Jeanson mjeanson@efficios.com Reviewed-by: Mathieu Desnoyers mathieu.desnoyers@efficios.com CC: Benjamin Herrenschmidt benh@kernel.crashing.org CC: Paul Mackerras paulus@samba.org CC: Michael Ellerman mpe@ellerman.id.au CC: Kumar Gala galak@kernel.crashing.org CC: Vakul Garg vakul.garg@nxp.com CC: Scott Wood swood@redhat.com CC: Mathieu Desnoyers mathieu.desnoyers@efficios.com CC: linuxppc-dev@lists.ozlabs.org CC: linux-kernel@vger.kernel.org Signed-off-by: Michael Ellerman mpe@ellerman.id.au [bwh: Backported to 3.16: adjust context] Signed-off-by: Ben Hutchings ben@decadent.org.uk --- arch/powerpc/Makefile | 1 + 1 file changed, 1 insertion(+)
--- a/arch/powerpc/Makefile +++ b/arch/powerpc/Makefile @@ -205,6 +205,7 @@ endif cpu-as-$(CONFIG_4xx) += -Wa,-m405 cpu-as-$(CONFIG_ALTIVEC) += -Wa,-maltivec cpu-as-$(CONFIG_E200) += -Wa,-me200 +cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc)
KBUILD_AFLAGS += $(cpu-as-y) KBUILD_CFLAGS += $(cpu-as-y)