linux-kernel - [PATCH 07/25] mm/csky: Use mm_fault

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20200615221607.7764-8-peterx@redhat.com>
Date:   Mon, 15 Jun 2020 18:15:49 -0400
From:   Peter Xu <peterx@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     Gerald Schaefer <gerald.schaefer@...ibm.com>,
        Andrew Morton <akpm@...ux-foundation.org>, peterx@...hat.com,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Guo Ren <guoren@...nel.org>, linux-csky@...r.kernel.org
Subject: [PATCH 07/25] mm/csky: Use mm_fault_accounting()

Use the new mm_fault_accounting() helper for page fault accounting.
Also, move the accounting to be after release of mmap_sem.

CC: Guo Ren <guoren@...nel.org>
CC: linux-csky@...r.kernel.org
Signed-off-by: Peter Xu <peterx@...hat.com>
---
 arch/csky/mm/fault.c | 13 +------------
 1 file changed, 1 insertion(+), 12 deletions(-)

diff --git a/arch/csky/mm/fault.c b/arch/csky/mm/fault.c
index 4e6dc68f3258..8f8d34d27eca 100644
--- a/arch/csky/mm/fault.c
+++ b/arch/csky/mm/fault.c
@@ -111,8 +111,6 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long write,
 		return;
 	}
 #endif
-
-	perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address);
 	/*
 	 * If we're in an interrupt or have no user
 	 * context, we must not take the fault..
@@ -160,17 +158,8 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long write,
 			goto bad_area;
 		BUG();
 	}
-	if (fault & VM_FAULT_MAJOR) {
-		tsk->maj_flt++;
-		perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1, regs,
-			      address);
-	} else {
-		tsk->min_flt++;
-		perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, 1, regs,
-			      address);
-	}
-
 	up_read(&mm->mmap_sem);
+	mm_fault_accounting(tsk, regs, address, fault & VM_FAULT_MAJOR);
 	return;
 
 	/*
-- 
2.26.2