Commit a211276a authored by Max Filippov's avatar Max Filippov
Browse files

xtensa: implement pgprot_noncached 



The default pgprot_noncached doesn't do anything. This leads to issues
when drivers rely on it to disable caching in userspace mappings.
Implement pgprot_noncached properly so that caching of userspace mappings
could be controlled.

Signed-off-by: default avatarMax Filippov <jcmvbkbc@gmail.com>
parent bfe01a5b

arch/xtensa/include/asm/pgtable.h

+2 −0
Original line number Diff line number Diff line
@@ -277,6 +277,8 @@ static inline pte_t pte_mkwrite(pte_t pte) 
static inline pte_t pte_mkspecial(pte_t pte)

	{ return pte; }



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



/*

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

 * and a page entry and page directory to the page they refer to.

CRA Git | Maintained and supported by SUSTech CRA and CCSE