From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Dominik Dingel Subject: [PATCH 1/2] mm: fixup_userfault returns VM_FAULT_RETRY if asked Date: Thu, 19 Nov 2015 00:49:57 +0100 Message-Id: <1447890598-56860-2-git-send-email-dingel@linux.vnet.ibm.com> In-Reply-To: <1447890598-56860-1-git-send-email-dingel@linux.vnet.ibm.com> References: <1447890598-56860-1-git-send-email-dingel@linux.vnet.ibm.com> Sender: owner-linux-mm@kvack.org List-Archive: List-Post: To: linux-s390@vger.kernel.org, linux-mm@kvack.org Cc: Andrew Morton , "Kirill A. Shutemov" , Andrea Arcangeli , David Rientjes , Eric B Munson , Naoya Horiguchi , Mel Gorman , Martin Schwidefsky , Heiko Carstens , Dominik Dingel , Christian Borntraeger , Paolo Bonzini , "Jason J. Herne" , linux-kernel@vger.kernel.org List-ID: When calling fixup_userfault with FAULT_FLAG_ALLOW_RETRY, fixup_userfault didn't care about VM_FAULT_RETRY and returned 0. If the VM_FAULT_RETRY flag is set we will return the complete result of handle_mm_fault. Signed-off-by: Dominik Dingel --- mm/gup.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/gup.c b/mm/gup.c index deafa2c..2af3b31 100644 --- a/mm/gup.c +++ b/mm/gup.c @@ -609,6 +609,8 @@ int fixup_user_fault(struct task_struct *tsk, struct mm_struct *mm, return -EFAULT; BUG(); } + if (ret & VM_FAULT_RETRY) + return ret; if (tsk) { if (ret & VM_FAULT_MAJOR) tsk->maj_flt++; -- 2.3.9 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org