The patch is needed to match the API kernel changes. This fixes:
zc.c:68:44: error: passing argument 7 of 'get_user_pages_remote' from incompatible pointer type [-Werror=incompatible-pointer-types]
(unsigned long)addr, pgcount, write, 0, pg, NULL);
^~
In file included from zc.c:28:0:
kernel-source/include/linux/mm.h:1276:6: note: expected 'struct vm_area_struct **' but argument is of type 'struct page **'
long get_user_pages_remote(struct task_struct *tsk, struct mm_struct *mm,
^~~~~~~~~~~~~~~~~~~~~
zc.c:63:8: error: too many arguments to function 'get_user_pages_remote'
ret = get_user_pages_remote(
^~~~~~~~~~~~~~~~~~~~~
In file included from zc.c:28:0:
kernel-source/include/linux/mm.h:1276:6: note: declared here
long get_user_pages_remote(struct task_struct *tsk, struct mm_struct *mm,
^~~~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
https://jira.digi.com/browse/DEL-5081
Signed-off-by: Jose Diaz de Grenu <Jose.DiazdeGrenu@digi.com>