retained_mem: add user thread support.

Fixes #61848. (cherry picked from commit c5b19cc) Original-Signed-off-by: Laczen JMS <laczenjms@gmail.com> GitOrigin-RevId: c5b19cc Change-Id: I46ca78c737d74420312884a2b207a3b865691628 Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/zephyr/+/4810700 Tested-by: ChromeOS Prod (Robot) <chromeos-ci-prod@chromeos-bot.iam.gserviceaccount.com> Reviewed-by: Fabio Baltieri <fabiobaltieri@google.com> Commit-Queue: Fabio Baltieri <fabiobaltieri@google.com> Tested-by: Fabio Baltieri <fabiobaltieri@google.com>
coreboot · Aug 24, 2023 · bc0fe94 · bc0fe94
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diff --git a/drivers/retained_mem/CMakeLists.txt b/drivers/retained_mem/CMakeLists.txt
@@ -3,5 +3,6 @@
 zephyr_syscall_header(${ZEPHYR_BASE}/include/zephyr/drivers/retained_mem.h)
 
 zephyr_library()
+zephyr_library_sources_ifdef(CONFIG_USERSPACE retained_mem_handlers.c)
 zephyr_library_sources_ifdef(CONFIG_RETAINED_MEM_NRF_GPREGRET retained_mem_nrf_gpregret.c)
 zephyr_library_sources_ifdef(CONFIG_RETAINED_MEM_ZEPHYR_RAM   retained_mem_zephyr_ram.c)
diff --git a/include/zephyr/drivers/retained_mem.h b/include/zephyr/drivers/retained_mem.h
@@ -75,7 +75,7 @@ typedef int (*retained_mem_clear_api)(const struct device *dev);
  *
  * Note that drivers must implement all functions, none of the functions are optional.
  */
-struct retained_mem_driver_api {
+__subsystem struct retained_mem_driver_api {
 	retained_mem_size_api size;
 	retained_mem_read_api read;
 	retained_mem_write_api write;