According to the document "Minimal requirements to compile the Kernel [1], the minimal version of GCC is 5.1, -mr10k-cache-barrier=store is supported with GCC 5.1 [2], so just remove the unnecessary check to fix the build error [3]: arch/mips/sgi-ip22/Platform:28: *** gcc doesn't support needed option -mr10k-cache-barrier=store. Stop. [1] https://www.kernel.org/doc/html/latest/process/changes.html [2] https://gcc.gnu.org/onlinedocs/gcc-5.1.0/gcc/MIPS-Options.html [3] https://github.com/ClangBuiltLinux/linux/issues/1543 Reported-by: Ryutaroh Matsumoto <ryutaroh@xxxxxxxxxxxxxxxxxx> Suggested-by: Nathan Chancellor <nathan@xxxxxxxxxx> Signed-off-by: Tiezhu Yang <yangtiezhu@xxxxxxxxxxx> --- arch/mips/sgi-ip22/Platform | 5 ----- 1 file changed, 5 deletions(-) diff --git a/arch/mips/sgi-ip22/Platform b/arch/mips/sgi-ip22/Platform index 62fa30b..a4c46e3 100644 --- a/arch/mips/sgi-ip22/Platform +++ b/arch/mips/sgi-ip22/Platform @@ -23,10 +23,5 @@ endif # be 16kb aligned or the handling of the current variable will break. # Simplified: what IP22 does at 128MB+ in ksegN, IP28 does at 512MB+ in xkphys # -ifdef CONFIG_SGI_IP28 - ifeq ($(call cc-option-yn,-march=r10000 -mr10k-cache-barrier=store), n) - $(error gcc doesn't support needed option -mr10k-cache-barrier=store) - endif -endif cflags-$(CONFIG_SGI_IP28) += -mr10k-cache-barrier=store -I$(srctree)/arch/mips/include/asm/mach-ip28 load-$(CONFIG_SGI_IP28) += 0xa800000020004000 -- 2.1.0
