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Thu, 06 Feb 2020 03:10:47 +0000 Received: from b03ledav005.gho.boulder.ibm.com (b03ledav005.gho.boulder.ibm.com [9.17.130.236]) by b03cxnp08027.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 0163AjOK42271104 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 6 Feb 2020 03:10:45 GMT Received: from b03ledav005.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 17D6DBE04F; Thu, 6 Feb 2020 03:10:45 +0000 (GMT) Received: from b03ledav005.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 26C9ABE051; Thu, 6 Feb 2020 03:10:28 +0000 (GMT) Received: from LeoBras.aus.stglabs.ibm.com (unknown [9.85.163.250]) by b03ledav005.gho.boulder.ibm.com (Postfix) with ESMTP; Thu, 6 Feb 2020 03:10:26 +0000 (GMT) From: Leonardo Bras To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Arnd Bergmann , Andrew Morton , "Aneesh Kumar K.V" , Nicholas Piggin , Christophe Leroy , Steven Price , Robin Murphy , Leonardo Bras , Mahesh Salgaonkar , Balbir Singh , Reza Arbab , Thomas Gleixner , Allison Randal , Greg Kroah-Hartman , Mike Rapoport , Michal Suchanek Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, kvm-ppc@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v6 04/11] powerpc/mce_power: Use functions to track lockless pgtbl walks Date: Thu, 6 Feb 2020 00:08:53 -0300 Message-Id: <20200206030900.147032-5-leonardo@linux.ibm.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200206030900.147032-1-leonardo@linux.ibm.com> References: <20200206030900.147032-1-leonardo@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.572 definitions=2020-02-05_06:2020-02-04,2020-02-05 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 malwarescore=0 phishscore=0 impostorscore=0 bulkscore=0 mlxscore=0 lowpriorityscore=0 adultscore=0 mlxlogscore=795 spamscore=0 priorityscore=1501 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2002060022 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Applies the new functions used for tracking lockless pgtable walks on addr_to_pfn(). local_irq_{save,restore} is already inside {begin,end}_lockless_pgtbl_walk, so there is no need to repeat it here. Signed-off-by: Leonardo Bras --- arch/powerpc/kernel/mce_power.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/kernel/mce_power.c b/arch/powerpc/kernel/mce_power.c index 1cbf7f1a4e3d..a9e38ef4e437 100644 --- a/arch/powerpc/kernel/mce_power.c +++ b/arch/powerpc/kernel/mce_power.c @@ -29,7 +29,7 @@ unsigned long addr_to_pfn(struct pt_regs *regs, unsigned long addr) { pte_t *ptep; unsigned int shift; - unsigned long pfn, flags; + unsigned long pfn, irq_mask; struct mm_struct *mm; if (user_mode(regs)) @@ -37,7 +37,7 @@ unsigned long addr_to_pfn(struct pt_regs *regs, unsigned long addr) else mm = &init_mm; - local_irq_save(flags); + irq_mask = begin_lockless_pgtbl_walk(); ptep = __find_linux_pte(mm->pgd, addr, NULL, &shift); if (!ptep || pte_special(*ptep)) { @@ -53,7 +53,7 @@ unsigned long addr_to_pfn(struct pt_regs *regs, unsigned long addr) } out: - local_irq_restore(flags); + end_lockless_pgtbl_walk(irq_mask); return pfn; }