linux-kernel - [PATCH 05/10] kernel/fork: use vfree

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Message-Id: <1479474236-4139-6-git-send-email-hch@lst.de>
Date:   Fri, 18 Nov 2016 14:03:51 +0100
From:   Christoph Hellwig <hch@....de>
To:     akpm@...ux-foundation.org
Cc:     aryabinin@...tuozzo.com, joelaf@...gle.com, jszhang@...vell.com,
        chris@...is-wilson.co.uk, joaodias@...gle.com, linux-mm@...ck.org,
        linux-rt-users@...r.kernel.org, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 05/10] kernel/fork: use vfree_atomic() to free thread stack

From: Andrey Ryabinin <aryabinin@...tuozzo.com>

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@...tuozzo.com>
---
 kernel/fork.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/fork.c b/kernel/fork.c
index 997ac1d..cfee5ec 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
-- 
2.1.4