gcc-15 bug fixed

Makefile

@@ -85,7 +85,7 @@ LD = $(TOOLPREFIX)ld
 OBJCOPY = $(TOOLPREFIX)objcopy
 OBJDUMP = $(TOOLPREFIX)objdump
 
-CFLAGS = -Wall -Werror -O -fno-omit-frame-pointer -ggdb -gdwarf-2
+CFLAGS = -Wall -Werror -O1 -fno-omit-frame-pointer -ggdb -gdwarf-2
 
 ifdef LAB
 LABUPPER = $(shell echo $(LAB) | tr a-z A-Z)
@@ -238,10 +238,10 @@ $U/_uthread: $U/uthread.o $U/uthread_switch.o $(ULIB)
 	$(OBJDUMP) -S $U/_uthread > $U/uthread.asm
 
 ph: notxv6/ph.c
-	gcc -o ph -g -O2 $(XCFLAGS) notxv6/ph.c -pthread
+	gcc -o ph -g -Ofast $(XCFLAGS) notxv6/ph.c -pthread
 
 barrier: notxv6/barrier.c
-	gcc -o barrier -g -O2 $(XCFLAGS) notxv6/barrier.c -pthread
+	gcc -o barrier -g -Ofast $(XCFLAGS) notxv6/barrier.c -pthread
 endif
 
 ifeq ($(LAB),pgtbl)

user/usertests.c

@@ -244,7 +244,7 @@ copyinstr3(char *s)
 // See if the kernel refuses to read/write user memory that the
 // application doesn't have anymore, because it returned it.
 void
-rwsbrk()
+rwsbrk(char* arg)
 {
   int fd, n;