Unlock mutexes on process death

kernel/amd64/proc.c

@@ -9,6 +9,7 @@
 #include <limine/requests.h>
 #include <mm/liballoc.h>
 #include <mm/pmm.h>
+#include <proc/mutex.h>
 #include <proc/proc.h>
 #include <proc/procgroup.h>
 #include <proc/resource.h>
@@ -118,6 +119,8 @@ void proc_cleanup (struct proc* proc) {
 
   spin_unlock (&proc->lock, &ctxpr);
 
+  proc_mutexes_cleanup (proc);
+
   pmm_free (proc->pdata.kernel_stack, KSTACK_SIZE / PAGE_SIZE);
   procgroup_unmap (proc->procgroup, proc->pdata.tls_vaddr, proc->procgroup->tls.tls_tmpl_pages);