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riscv: Add pgprot_writecombine/device and PAGE_SHARED defination if NOMMU

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Some drivers use PAGE_SHARED, pgprot_writecombine()/pgprot_device(),
add the defination to fix build error if NOMMU.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
This commit is contained in:
Kefeng Wang 2020-05-11 10:19:54 +08:00 committed by Palmer Dabbelt
parent 0502bee37c
commit fa8174aa22
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2 changed files with 3 additions and 0 deletions
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2
arch/riscv/include/asm/mmio.h
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@ -16,6 +16,8 @@
#ifndef CONFIG_MMU
#define pgprot_noncached(x) (x)
#define pgprot_writecombine(x) (x)
#define pgprot_device(x) (x)
#endif /* CONFIG_MMU */
/* Generic IO read/write. These perform native-endian accesses. */

1
arch/riscv/include/asm/pgtable.h
View File

@ -470,6 +470,7 @@ static inline int ptep_clear_flush_young(struct vm_area_struct *vma,
#else /* CONFIG_MMU */
#define PAGE_SHARED __pgprot(0)
#define PAGE_KERNEL __pgprot(0)
#define swapper_pg_dir NULL
#define VMALLOC_START 0