MIPS: Kconfig: Disable MIPS MT and SMP implementations for R6

This change “MIPS: Kconfig: Disable MIPS MT and SMP implementations for R6″ in Linux kernel is authored by Markos Chandras <markos.chandras [at] imgtec.com> on Thu Jul 9 10:40:38 2015 +0100.

MIPS: Kconfig: Disable MIPS MT and SMP implementations for R6

R6 does not support the MIPS MT ASE and the CMP/SMP options so
restrict them in order to prevent users from selecting incompatible
SMP configuration for R6 cores. We also disable the CPS/SMP option
because its support hasn't been added to the CPS code yet.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/10637/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

This Linux change may have been applied to various maintained Linux releases and you can find Linux releases including commit 5676319.

There are 6 lines of Linux source code added/deleted in this change. Code changes to Linux kernel are as follows.

 arch/mips/Kconfig | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 199a835..60d7ae7 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -2113,7 +2113,7 @@ config CPU_R4K_CACHE_TLB
 
 config MIPS_MT_SMP
 	bool "MIPS MT SMP support (1 TC on each available VPE)"
-	depends on SYS_SUPPORTS_MULTITHREADING
+	depends on SYS_SUPPORTS_MULTITHREADING && !CPU_MIPSR6
 	select CPU_MIPSR2_IRQ_VI
 	select CPU_MIPSR2_IRQ_EI
 	select SYNC_R4K
@@ -2214,7 +2214,7 @@ config MIPS_VPE_APSP_API_MT
 
 config MIPS_CMP
 	bool "MIPS CMP framework support (DEPRECATED)"
-	depends on SYS_SUPPORTS_MIPS_CMP
+	depends on SYS_SUPPORTS_MIPS_CMP && !CPU_MIPSR6
 	select MIPS_GIC_IPI
 	select SMP
 	select SYNC_R4K
@@ -2231,7 +2231,7 @@ config MIPS_CMP
 
 config MIPS_CPS
 	bool "MIPS Coherent Processing System support"
-	depends on SYS_SUPPORTS_MIPS_CPS
+	depends on SYS_SUPPORTS_MIPS_CPS && !CPU_MIPSR6
 	select MIPS_CM
 	select MIPS_CPC
 	select MIPS_CPS_PM if HOTPLUG_CPU

The commit for this change in Linux stable tree is 5676319 (patch).

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