Messages in this thread Patch in this message | | | Date | Tue, 03 Mar 2015 07:15:15 +0800 | From | Chen Gang S <> | Subject | Fwd: [PATCH] c6x: asm: pgtable: Define dummy pgprot_writecombine for !MMU |
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-------- Forwarded Message -------- Subject: [PATCH] c6x: asm: pgtable: Define dummy pgprot_writecombine for !MMU Date: Tue, 03 Mar 2015 07:06:25 +0800 From: Chen Gang <762976180@qq.com> To: msalter@redhat.com, a-jacquiot@ti.com CC: kirill.shutemov@linux.intel.com, Andrew Morton <akpm@linux-foundation.org>, linux-c6x-dev@linux-c6x.org <linux-c6x-dev@linux-c6x.org>, linux-kernel@vger.kernel.org <linux-kernel@vger.kernel.org>
When !MMU, asm-generic will not define default pgprot_writecombine, so c6x needs to define it by itself. The related error:
CC [M] fs/pstore/ram_core.o fs/pstore/ram_core.c: In function 'persistent_ram_vmap': fs/pstore/ram_core.c:399:10: error: implicit declaration of function 'pgprot_writecombine' [-Werror=implicit-function-declaration] prot = pgprot_writecombine(PAGE_KERNEL); ^ fs/pstore/ram_core.c:399:8: error: incompatible types when assigning to type 'pgprot_t {aka struct <anonymous>}' from type 'int' prot = pgprot_writecombine(PAGE_KERNEL); ^
Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com> --- arch/c6x/include/asm/pgtable.h | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/arch/c6x/include/asm/pgtable.h b/arch/c6x/include/asm/pgtable.h index 78d4483..ec4db6d 100644 --- a/arch/c6x/include/asm/pgtable.h +++ b/arch/c6x/include/asm/pgtable.h @@ -67,6 +67,11 @@ extern unsigned long empty_zero_page; */ #define pgtable_cache_init() do { } while (0) +/* + * c6x is !MMU, so define the simpliest implementation + */ +#define pgprot_writecombine pgprot_noncached + #include <asm-generic/pgtable.h> #endif /* _ASM_C6X_PGTABLE_H */ -- 1.9.3
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