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* LoongArch: Fix build errors for tinyconfigHuacai Chen2022-07-071-0/+1
| | | | | | | | | | | | | Building loongarch:tinyconfig fails with the following error. ./arch/loongarch/include/asm/page.h: In function 'pfn_valid': ./arch/loongarch/include/asm/page.h:42:32: error: 'PHYS_OFFSET' undeclared Add the missing include file and fix succeeding vdso errors. Fixes: 09cfefb7fa70 ("LoongArch: Add memory management") Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
* LoongArch: Add VDSO and VSYSCALL supportHuacai Chen2022-06-037-0/+267
| | | | | | | | | Add VDSO and VSYSCALL support (sigreturn, gettimeofday and its friends) for LoongArch. Reviewed-by: WANG Xuerui <git@xen0n.name> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
* LoongArch: Add build infrastructureHuacai Chen2022-06-031-0/+2
Add Kbuild, Makefile, Kconfig and link script for LoongArch build infrastructure. Reviewed-by: Guo Ren <guoren@kernel.org> Reviewed-by: WANG Xuerui <git@xen0n.name> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>