sched: Improve the scheduler

This change is for general scheduler improvements.

Change-Id: I3842c589378ce5bcc54e4c35ebcbfbdfa1f88a8f
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>

kernel/sched/core.c

@@ -4917,8 +4917,10 @@ unsigned int sched_lib_mask_force;
 bool is_sched_lib_based_app(pid_t pid)
 {
 	const char *name = NULL;
+	char *libname, *lib_list;
 	struct vm_area_struct *vma;
 	char path_buf[LIB_PATH_LENGTH];
+	char *tmp_lib_name;
 	bool found = false;
 	struct task_struct *p;
 	struct mm_struct *mm;
@@ -4926,11 +4928,16 @@ bool is_sched_lib_based_app(pid_t pid)
 	if (strnlen(sched_lib_name, LIB_PATH_LENGTH) == 0)
 		return false;
 
+	tmp_lib_name = kmalloc(LIB_PATH_LENGTH, GFP_KERNEL);
+	if (!tmp_lib_name)
+		return false;
+
 	rcu_read_lock();
 
 	p = find_process_by_pid(pid);
 	if (!p) {
 		rcu_read_unlock();
+		kfree(tmp_lib_name);
 		return false;
 	}
 
@@ -4950,10 +4957,15 @@ bool is_sched_lib_based_app(pid_t pid)
 			if (IS_ERR(name))
 				goto release_sem;
 
-			if (strnstr(name, sched_lib_name,
+			strlcpy(tmp_lib_name, sched_lib_name, LIB_PATH_LENGTH);
+			lib_list = tmp_lib_name;
+			while ((libname = strsep(&lib_list, ","))) {
+				libname = skip_spaces(libname);
+				if (strnstr(name, libname,
 					strnlen(name, LIB_PATH_LENGTH))) {
-				found = true;
-				break;
+					found = true;
+					goto release_sem;
+				}
 			}
 		}
 	}
@@ -4963,6 +4975,7 @@ release_sem:
 	mmput(mm);
 put_task_struct:
 	put_task_struct(p);
+	kfree(tmp_lib_name);
 	return found;
 }