cr50_fuzz: Fix build errors related to nvmem_wipe_cache.

The declaration of nvmem_wipe_cache is now inside the extern "C"
section and a definition was added to cr50_fuzz.

BRANCH=None
BUG=None
TEST=make -j buildall

Change-Id: Ie7401d8880e7982c84fa6a5df5015cbd145fc6d1
Signed-off-by: Allen Webb <allenwebb@google.com>
Reviewed-on: https://chromium-review.googlesource.com/1370746
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>

1 files changed, 8 insertions, 4 deletions

diff --git a/fuzz/cr50_fuzz.cc b/fuzz/cr50_fuzz.cc
index 4c842631bd..e891ee5d85 100644
--- a/fuzz/cr50_fuzz.cc
+++ b/fuzz/cr50_fuzz.cc
@@ -56,6 +56,14 @@ extern "C" uint8_t get_current_pcr_digest(const uint8_t bitmask[2],
   return 0;
 }
 
+extern "C" int DCRYPTO_ladder_is_enabled(void) {
+  return 1;
+}
+
+extern "C" void nvmem_wipe_cache(void) {
+  // Nothing to do since there is no cache in this implementation.
+}
+
 // Needed for test targets to build.
 extern "C" void run_test(void) {}
 
@@ -139,7 +147,3 @@ extern "C" int test_fuzz_one_input(const uint8_t* data, unsigned int size) {
   }
   return 0;
 }
-
-extern "C" int DCRYPTO_ladder_is_enabled(void) {
-  return 1;
-}