Commit d4ff983e authored by Max Filippov's avatar Max Filippov
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xtensa: fix pgprot_noncached assumptions 



pgprot_noncached assumes that cache bypass attribute is represented as
zero. This may not always be true. Fix pgprot_noncached definition by
adding _PAGE_CA_BYPASS to the result.

Signed-off-by: default avatarMax Filippov <jcmvbkbc@gmail.com>
parent 4f22ca7e

arch/xtensa/include/asm/pgtable.h

+3 −1
Original line number Diff line number Diff line
@@ -280,7 +280,9 @@ static inline pte_t pte_mkyoung(pte_t pte) 
static inline pte_t pte_mkwrite(pte_t pte)

	{ pte_val(pte) |= _PAGE_WRITABLE; return pte; }



#define pgprot_noncached(prot) (__pgprot(pgprot_val(prot) & ~_PAGE_CA_MASK))

#define pgprot_noncached(prot) \

		((__pgprot((pgprot_val(prot) & ~_PAGE_CA_MASK) | \

			   _PAGE_CA_BYPASS)))



/*

 * Conversion functions: convert a page and protection to a page entry,