diff options
| author | Max Filippov <jcmvbkbc@gmail.com> | 2014-09-11 00:05:21 -0400 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2014-10-05 19:23:50 -0400 |
| commit | a211276a8e4dbafbcd492ae3bee84a4d6db3fb75 (patch) | |
| tree | 5712d9e5100127cfd230a6a21aba473aadef8bc1 /arch/xtensa | |
| parent | bfe01a5ba2490f299e1d2d5508cbbbadd897bbe9 (diff) | |
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: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'arch/xtensa')
| -rw-r--r-- | arch/xtensa/include/asm/pgtable.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/xtensa/include/asm/pgtable.h b/arch/xtensa/include/asm/pgtable.h index b2173e5da601..0383aed59121 100644 --- a/arch/xtensa/include/asm/pgtable.h +++ b/arch/xtensa/include/asm/pgtable.h | |||
| @@ -277,6 +277,8 @@ static inline pte_t pte_mkwrite(pte_t pte) | |||
| 277 | static inline pte_t pte_mkspecial(pte_t pte) | 277 | static inline pte_t pte_mkspecial(pte_t pte) |
| 278 | { return pte; } | 278 | { return pte; } |
| 279 | 279 | ||
| 280 | #define pgprot_noncached(prot) (__pgprot(pgprot_val(prot) & ~_PAGE_CA_MASK)) | ||
| 281 | |||
| 280 | /* | 282 | /* |
| 281 | * Conversion functions: convert a page and protection to a page entry, | 283 | * Conversion functions: convert a page and protection to a page entry, |
| 282 | * and a page entry and page directory to the page they refer to. | 284 | * and a page entry and page directory to the page they refer to. |