[PATCH 1/3] kho: Add kunit static stubs

[Samiullah Khawaja <skhawaja@google.com>]

Add kunit stubs in kho_restore_folio() and kho_restore_pages() so the
users can mock these functions in kunit tests.

Signed-off-by: Samiullah Khawaja <skhawaja@google.com>
---
 kernel/liveupdate/kexec_handover.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/kernel/liveupdate/kexec_handover.c b/kernel/liveupdate/kexec_handover.c
index d5718bef6d4d..1375291d9b07 100644
--- a/kernel/liveupdate/kexec_handover.c
+++ b/kernel/liveupdate/kexec_handover.c
@@ -11,6 +11,7 @@
 #define pr_fmt(fmt) "KHO: " fmt
 
 #include <linux/cleanup.h>
+#include <kunit/static_stub.h>
 #include <linux/cma.h>
 #include <linux/kmemleak.h>
 #include <linux/count_zeros.h>
@@ -437,7 +438,11 @@ static struct page *kho_restore_page(phys_addr_t phys, bool is_folio)
  */
 struct folio *kho_restore_folio(phys_addr_t phys)
 {
-	struct page *page = kho_restore_page(phys, true);
+	struct page *page;
+
+	KUNIT_STATIC_STUB_REDIRECT(kho_restore_folio, phys);
+
+	page = kho_restore_page(phys, true);
 
 	return page ? page_folio(page) : NULL;
 }
@@ -459,6 +464,8 @@ struct page *kho_restore_pages(phys_addr_t phys, unsigned long nr_pages)
 	const unsigned long end_pfn = start_pfn + nr_pages;
 	unsigned long pfn = start_pfn;
 
+	KUNIT_STATIC_STUB_REDIRECT(kho_restore_pages, phys, nr_pages);
+
 	while (pfn < end_pfn) {
 		const unsigned int order =
 			min(count_trailing_zeros(pfn), ilog2(end_pfn - pfn));
-- 
2.54.0.563.g4f69b47b94-goog