[PATCH 2/3] kernel/fork: use vfree_atomic() to free thread stack

[Andrey Ryabinin]

vfree() is going to use sleeping lock. Thread stack freed in atomic
context, therefore we must use vfree_atomic() here.

Signed-off-by: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Joel Fernandes <joelaf@xxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Jisheng Zhang <jszhang@xxxxxxxxxxx>
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: John Dias <joaodias@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: x86@xxxxxxxxxx
---
 kernel/fork.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/fork.c b/kernel/fork.c
index fd85c68..417e94f 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -229,7 +229,7 @@ static inline void free_thread_stack(struct task_struct *tsk)
 		}
 		local_irq_restore(flags);
 
-		vfree(tsk->stack);
+		vfree_atomic(tsk->stack);
 		return;
 	}
 #endif
-- 
2.7.3