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mm/hmm: constify hmm_devmem_page_get_drvdata() parameter 

Constify pointer parameter to avoid issue when use from code that only
has const struct page pointer to use in the first place.

Link: http://lkml.kernel.org/r/1506972774-10191-1-git-send-email-jglisse@redhat.com
Signed-off-by: Ralph Campbell <rcampbell@nvidia.com>
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ralph Campbell 2017-11-15 17:34:00 -08:00 committed by Linus Torvalds
parent 007ab7b49a
commit 0bea803e9e
1 changed files with 2 additions and 2 deletions
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4
include/linux/hmm.h
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@ -471,9 +471,9 @@ static inline void hmm_devmem_page_set_drvdata(struct page *page,
* @page: pointer to struct page
* Return: driver data value
*/
static inline unsigned long hmm_devmem_page_get_drvdata(struct page *page)
static inline unsigned long hmm_devmem_page_get_drvdata(const struct page *page)
{
unsigned long *drvdata = (unsigned long *)&page->pgmap;
const unsigned long *drvdata = (const unsigned long *)&page->pgmap;
return drvdata[1];
}