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| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-08-23 22:15:02 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-08-24 09:43:49 +0200 |
| commit | 351243897b15aba02ad15317724d616aeaf00c7d (patch) | |
| tree | c37b5871c56714987cd19f78e91a180157504942 /include/linux/io-mapping.h | |
| parent | bcaaa0c4310ebe1ab04274594916bbb2d82a49c8 (diff) | |
| download | lwn-351243897b15aba02ad15317724d616aeaf00c7d.tar.gz lwn-351243897b15aba02ad15317724d616aeaf00c7d.zip | |
io-mapping: Fixup for different names of writecombine
Somehow architectures can't agree on this. And for good measure make
sure we have a fallback which should work everywhere (fingers
crossed).
v2: Make it compile properly, needs a defined() for the #elif.
Fixes: ac96b5566926 ("io-mapping.h: s/PAGE_KERNEL_IO/PAGE_KERNEL/")
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: linux-mm@kvack.org
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20160823202233.4681-1-daniel.vetter@ffwll.ch
(cherry picked from commit 80c33624e4723c4e22d9917cd676067ebf652dc2)
Diffstat (limited to 'include/linux/io-mapping.h')
| -rw-r--r-- | include/linux/io-mapping.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/io-mapping.h b/include/linux/io-mapping.h index a87dd7fffc0a..58df02bd93c9 100644 --- a/include/linux/io-mapping.h +++ b/include/linux/io-mapping.h @@ -123,7 +123,13 @@ io_mapping_init_wc(struct io_mapping *iomap, iomap->base = base; iomap->size = size; iomap->iomem = ioremap_wc(base, size); +#if defined(pgprot_noncached_wc) /* archs can't agree on a name ... */ + iomap->prot = pgprot_noncached_wc(PAGE_KERNEL); +#elif defined(pgprot_writecombine) iomap->prot = pgprot_writecombine(PAGE_KERNEL); +#else + iomap->prot = pgprot_noncached(PAGE_KERNEL); +#endif return iomap; } |