Updated host/tools_support.c for new get_user_pages() function.

At some point the function prototype changed from this:

    long get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
                unsigned long start, unsigned long nr_pages,
                int write, int force, struct page **pages,
                struct vm_area_struct **vmas);

into this:

    long get_user_pages(unsigned long start, unsigned long nr_pages,
                    unsigned int gup_flags, struct page **pages,
                    struct vm_area_struct **vmas);

With the individual 'write' and 'force' flags transforming into gup_flags per
this patch:

    https://patchwork.kernel.org/project/linux-arm-kernel/patch/20161013002020.3062-7-lstoakes@gmail.com/

diff --git a/host/tools_support.c b/host/tools_support.c
index 49d37d4..38d6c21 100644 (file)
--- a/host/tools_support.c
+++ b/host/tools_support.c
@@ -89,8 +89,8 @@ mic_pin_user_pages (void *data, struct page **pages, uint32_t len, int32_t *nf_p
 
        // pin the user pages; use semaphores on linux for doing the same
        down_read(&current->mm->mmap_sem);
 
        // pin the user pages; use semaphores on linux for doing the same
        down_read(&current->mm->mmap_sem);

-       *nf_pages = (int32_t)get_user_pages(current, current->mm, (uint64_t)data,
-                         nr_pages, PROT_WRITE, 1, pages, NULL);
+       *nf_pages = (int32_t)get_user_pages((uint64_t)data, nr_pages,
+               (FOLL_WRITE | FOLL_FORCE), pages, NULL);

        up_read(&current->mm->mmap_sem);
 
        // compare if the no of final pages is equal to no of requested pages
        up_read(&current->mm->mmap_sem);
 
        // compare if the no of final pages is equal to no of requested pages