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From:   Peter Xu <peterx@redhat.com>
To:     linux-mm@kvack.org, linux-kernel@vger.kernel.org
Cc:     Peter Xu <peterx@redhat.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Gerald Schaefer <gerald.schaefer@de.ibm.com>,
        Andrea Arcangeli <aarcange@redhat.com>,
        Will Deacon <will@kernel.org>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>,
        linuxppc-dev@lists.ozlabs.org
Subject: [PATCH 16/26] mm/powerpc: Use general page fault accounting
Date:   Fri, 26 Jun 2020 18:36:22 -0400
Message-Id: <20200626223622.199765-1-peterx@redhat.com>
In-Reply-To: <20200626223130.199227-1-peterx@redhat.com>
References: <20200626223130.199227-1-peterx@redhat.com>
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Use the general page fault accounting by passing regs into handle_mm_fault().

CC: Michael Ellerman <mpe@ellerman.id.au>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: Paul Mackerras <paulus@samba.org>
CC: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Peter Xu <peterx@redhat.com>
---
 arch/powerpc/mm/fault.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index 992b10c3761c..e325d13efaf5 100644
--- a/arch/powerpc/mm/fault.c
+++ b/arch/powerpc/mm/fault.c
@@ -563,7 +563,7 @@ static int __do_page_fault(struct pt_regs *regs, unsigned long address,
 	 * make sure we exit gracefully rather than endlessly redo
 	 * the fault.
 	 */
-	fault = handle_mm_fault(vma, address, flags, NULL);
+	fault = handle_mm_fault(vma, address, flags, regs);
 
 #ifdef CONFIG_PPC_MEM_KEYS
 	/*
@@ -604,14 +604,9 @@ static int __do_page_fault(struct pt_regs *regs, unsigned long address,
 	/*
 	 * Major/minor page fault accounting.
 	 */
-	if (major) {
-		current->maj_flt++;
-		perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1, regs, address);
+	if (major)
 		cmo_account_page_fault();
-	} else {
-		current->min_flt++;
-		perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, 1, regs, address);
-	}
+
 	return 0;
 }
 NOKPROBE_SYMBOL(__do_page_fault);
-- 
2.26.2