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authorRalph Campbell <rcampbell@nvidia.com>2017-11-15 17:34:00 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-11-15 18:21:03 -0800
commit0bea803e9e6bf3836d5368a6426c30a8c0e5eab5 (patch)
tree6ea461225e701f2f8f5a9080f17f18a412121170
parent007ab7b49acb93af650f3acec0e51d2c6b843934 (diff)
downloadlinux-0bea803e9e6bf3836d5368a6426c30a8c0e5eab5.tar.bz2
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>
-rw-r--r--include/linux/hmm.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/hmm.h b/include/linux/hmm.h
index 96e69979f84d..325017ad9311 100644
--- a/include/linux/hmm.h
+++ b/include/linux/hmm.h
@@ -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];
}