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-rw-r--r--kernel/sysproc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sysproc.c b/kernel/sysproc.c
index 61b715b..99a36a7 100644
--- a/kernel/sysproc.c
+++ b/kernel/sysproc.c
@@ -63,7 +63,7 @@ sys_sleep(void)
acquire(&tickslock);
ticks0 = ticks;
while(ticks - ticks0 < n){
- if(__sync_add_and_fetch(&(myproc()->killed), 0)){
+ if(killed(myproc())){
release(&tickslock);
return -1;
}