Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Peter Xu <peterx@redhat.com>
To:     linux-mm@kvack.org, linux-kernel@vger.kernel.org
Cc:     Peter Xu <peterx@redhat.com>, Martin Cracauer <cracauer@cons.org>,
        Mike Rapoport <rppt@linux.vnet.ibm.com>,
        Hugh Dickins <hughd@google.com>,
        Jerome Glisse <jglisse@redhat.com>,
        "Kirill A . Shutemov" <kirill@shutemov.name>,
        Matthew Wilcox <willy@infradead.org>,
        Pavel Emelyanov <xemul@virtuozzo.com>,
        Brian Geffon <bgeffon@google.com>,
        Maya Gokhale <gokhale2@llnl.gov>,
        Denis Plotnikov <dplotnikov@virtuozzo.com>,
        Andrea Arcangeli <aarcange@redhat.com>,
        Johannes Weiner <hannes@cmpxchg.org>,
        "Dr . David Alan Gilbert" <dgilbert@redhat.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Mike Kravetz <mike.kravetz@oracle.com>,
        Marty McFadden <mcfadden8@llnl.gov>,
        David Hildenbrand <david@redhat.com>,
        Bobby Powers <bobbypowers@gmail.com>,
        Mel Gorman <mgorman@suse.de>
Subject: [PATCH RESEND v6 07/16] powerpc/mm: Use helper fault_signal_pending()
Date:   Thu, 20 Feb 2020 11:02:22 -0500
Message-Id: <20200220160222.9422-1-peterx@redhat.com>
In-Reply-To: <20200220155353.8676-1-peterx@redhat.com>
References: 
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Let powerpc code to use the new helper, by moving the signal handling
earlier before the retry logic.

Signed-off-by: Peter Xu <peterx@redhat.com>
---
 arch/powerpc/mm/fault.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index 8db0507619e2..0868172ce4e3 100644
--- a/arch/powerpc/mm/fault.c
+++ b/arch/powerpc/mm/fault.c
@@ -582,6 +582,9 @@ static int __do_page_fault(struct pt_regs *regs, unsigned long address,
 
 	major |= fault & VM_FAULT_MAJOR;
 
+	if (fault_signal_pending(fault, regs))
+		return user_mode(regs) ? 0 : SIGBUS;
+
 	/*
 	 * Handle the retry right now, the mmap_sem has been released in that
 	 * case.
@@ -595,15 +598,8 @@ static int __do_page_fault(struct pt_regs *regs, unsigned long address,
 			 */
 			flags &= ~FAULT_FLAG_ALLOW_RETRY;
 			flags |= FAULT_FLAG_TRIED;
-			if (!fatal_signal_pending(current))
-				goto retry;
+			goto retry;
 		}
-
-		/*
-		 * User mode? Just return to handle the fatal exception otherwise
-		 * return to bad_page_fault
-		 */
-		return is_user ? 0 : SIGBUS;
 	}
 
 	up_read(&current->mm->mmap_sem);
-- 
2.24.1