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(unknown [9.177.29.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.au.ibm.com (Postfix) with ESMTPSA id 1EBA5600EE; Wed, 21 Sep 2022 16:58:55 +1000 (AEST) From: Rohan McLure To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH v6 19/25] powerpc: Remove high-order word clearing on compat syscall entry Date: Wed, 21 Sep 2022 16:55:59 +1000 Message-Id: <20220921065605.1051927-20-rmclure@linux.ibm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220921065605.1051927-1-rmclure@linux.ibm.com> References: <20220921065605.1051927-1-rmclure@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: 4OTYxGFqqFSTxB9r5CEm1g0XA05BMxI6 X-Proofpoint-GUID: 5JOOwKXrctSbgqyMAmbI9DPJVWLsAxki X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.528,FMLib:17.11.122.1 definitions=2022-09-21_03,2022-09-20_02,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 mlxscore=0 mlxlogscore=786 suspectscore=0 priorityscore=1501 adultscore=0 spamscore=0 clxscore=1015 bulkscore=0 malwarescore=0 phishscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2209130000 definitions=main-2209210043 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Rohan McLure , Nicholas Piggin Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Remove explicit clearing of the high order-word of user parameters when handling compatibility syscalls in system_call_exception. The COMPAT_SYSCALL_DEFINEx macros handle this clearing through an explicit cast to the signature type of the target handler. Signed-off-by: Rohan McLure Reported-by: Nicholas Piggin Reviewed-by: Nicholas Piggin --- V6: New patch --- arch/powerpc/kernel/syscall.c | 8 -------- 1 file changed, 8 deletions(-) diff --git a/arch/powerpc/kernel/syscall.c b/arch/powerpc/kernel/syscall.c index 9875486f6168..15af0ed019a7 100644 --- a/arch/powerpc/kernel/syscall.c +++ b/arch/powerpc/kernel/syscall.c @@ -157,14 +157,6 @@ notrace long system_call_exception(long r3, long r4, long r5, if (unlikely(is_compat_task())) { f = (void *)compat_sys_call_table[r0]; - - r3 &= 0x00000000ffffffffULL; - r4 &= 0x00000000ffffffffULL; - r5 &= 0x00000000ffffffffULL; - r6 &= 0x00000000ffffffffULL; - r7 &= 0x00000000ffffffffULL; - r8 &= 0x00000000ffffffffULL; - } else { f = (void *)sys_call_table[r0]; }