From aec711d563c135186639443af1c2f0d8452b9709 Mon Sep 17 00:00:00 2001 From: "Maciej W. Rozycki" Date: Sat, 15 Nov 2014 22:08:23 +0000 Subject: [PATCH] MIPS: Kconfig: Only allow 32-bit microMIPS builds Only allow 32-bit microMIPS builds, we're not ready yet for 64-bit microMIPS support. QEMU does have support for the 64-bit microMIPS ISA and with minor tweaks it is possible to have a 64-bit processor emulated there that runs microMIPS code, so despite the lack of actual 64-bit microMIPS hardware there is a way to run 64-bit microMIPS Linux, but it can all be considered early development and we are not there yet. Userland tools are lacking too, e.g. GCC produces bad code: {standard input}: Assembler messages: {standard input}:380: Warning: wrong size instruction in a 16-bit branch delay slot And our build fails early on, so disable the configuration, for the sake of automatic random config checkers if nothing else. Whoever needs to experiment with 64-bit microMIPS support can revert this change easily. Signed-off-by: Maciej W. Rozycki Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/8481/ Signed-off-by: Ralf Baechle --- arch/mips/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 0bc8112c5486..d9393963e6d6 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -2143,7 +2143,7 @@ config CPU_HAS_SMARTMIPS here. config CPU_MICROMIPS - depends on SYS_SUPPORTS_MICROMIPS + depends on 32BIT && SYS_SUPPORTS_MICROMIPS bool "Build kernel using microMIPS ISA" help When this option is enabled the kernel will be built using the -- 2.20.1