kernel/proc: only expose `process_switch_any()`

other parts of the kernel don't need to care about which process exactly
gets switched into

1 files changed, 12 insertions, 9 deletions

diff --git a/src/kernel/proc.c b/src/kernel/proc.c
index 175377e..bb4509b 100644
--- a/src/kernel/proc.c
+++ b/src/kernel/proc.c
@@ -84,8 +84,7 @@ void process_free(struct process *p) {
 	kfree(p);
 }
 
-// TODO make process_switch private
-void process_switch(struct process *proc) {
+static _Noreturn void process_switch(struct process *proc) {
 	assert(proc->state == PS_RUNNING);
 	if (proc->deathbed) {
 		process_kill(proc, -1);
@@ -96,13 +95,8 @@ void process_switch(struct process *proc) {
 	sysexit(proc->regs);
 }
 
-_Noreturn void process_switch_any(void) {
-	struct process *found = process_find(PS_RUNNING);
-	if (found) process_switch(found);
-	process_idle();
-}
-
-_Noreturn void process_idle(void) {
+/** If there are any processes waiting for IRQs, wait with them. Otherwise, shut down */
+static _Noreturn void process_idle(void) {
 	struct process *procs[16];
 	size_t len = process_find_multiple(PS_WAITS4IRQ, procs, 16);
 
@@ -121,6 +115,15 @@ _Noreturn void process_idle(void) {
 	}
 }
 
+_Noreturn void process_switch_any(void) {
+	if (process_current && process_current->state == PS_RUNNING)
+		process_switch(process_current);
+
+	struct process *found = process_find(PS_RUNNING);
+	if (found) process_switch(found);
+	process_idle();
+}
+
 struct process *process_next(struct process *p) {
 	/* is a weird depth-first search, the search order is:
 	 *         1