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xtensa: fix pgprot_noncached assumptions

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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: Max Filippov <jcmvbkbc@gmail.com>
This commit is contained in:
Max Filippov 2021-02-17 01:36:57 -08:00
parent 4f22ca7e19
commit d4ff983e32
1 changed files with 3 additions and 1 deletions
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4
arch/xtensa/include/asm/pgtable.h
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@ -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,