The patch titled
Subject: arch/c6x/include/asm/pgtable.h: define dummy pgprot_writecombine for !MMU
has been added to the -mm tree. Its filename is
c6x-asm-pgtable-define-dummy-pgprot_writecombine-for-mmu.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/c6x-asm-pgtable-define-dummy-pgprot_writecombine-for-mmu.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/c6x-asm-pgtable-define-dummy-pgprot_writecombine-for-mmu.patch
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------------------------------------------------------
From: Chen Gang <762976180@xxxxxx>
Subject: arch/c6x/include/asm/pgtable.h: define dummy pgprot_writecombine for !MMU
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@xxxxxxxxx>
Cc: Mark Salter <msalter@xxxxxxxxxx>
Cc: Aurelien Jacquiot <a-jacquiot@xxxxxx>
Cc: "Kirill A. Shutemov" <kirill@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/c6x/include/asm/pgtable.h | 5 +++++
1 file changed, 5 insertions(+)
diff -puN arch/c6x/include/asm/pgtable.h~c6x-asm-pgtable-define-dummy-pgprot_writecombine-for-mmu arch/c6x/include/asm/pgtable.h
--- a/arch/c6x/include/asm/pgtable.h~c6x-asm-pgtable-define-dummy-pgprot_writecombine-for-mmu
+++ a/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 */
_
Patches currently in -mm which might be from 762976180@xxxxxx are
c6x-asm-pgtable-define-dummy-pgprot_writecombine-for-mmu.patch
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