Revert "Make oom_score_adjust_is_valid() static"

This reverts commit 6bf3c6c900.

src/basic/process-util.c

@@ -1037,6 +1037,10 @@ bool is_main_thread(void) {
         return cached > 0;
 }
 
+bool oom_score_adjust_is_valid(int oa) {
+        return oa >= OOM_SCORE_ADJ_MIN && oa <= OOM_SCORE_ADJ_MAX;
+}
+
 unsigned long personality_from_string(const char *p) {
         int architecture;
 

src/basic/process-util.h

@@ -82,6 +82,8 @@ int pid_from_same_root_fs(pid_t pid);
 
 bool is_main_thread(void);
 
+bool oom_score_adjust_is_valid(int oa);
+
 #ifndef PERSONALITY_INVALID
 /* personality(7) documents that 0xffffffffUL is used for querying the
  * current personality, hence let's use that here as error

src/core/dbus-execute.c

@@ -1,6 +1,5 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 
-#include <linux/oom.h>
 #include <sys/mount.h>
 #include <sys/prctl.h>
 
@@ -95,10 +94,6 @@ static int property_get_environment_files(
         return sd_bus_message_close_container(reply);
 }
 
-static bool oom_score_adjust_is_valid(int oa) {
-        return oa >= OOM_SCORE_ADJ_MIN && oa <= OOM_SCORE_ADJ_MAX;
-}
-
 static int property_get_oom_score_adjust(
                 sd_bus *bus,
                 const char *path,