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Fri, 26 Apr 2024 11:50:56 +0000 (GMT) From: Claudio Imbrenda To: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org Cc: hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, svens@linux.ibm.com, gerald.schaefer@linux.ibm.com, borntraeger@de.ibm.com Subject: [PATCH v2 1/2] s390/pgtable: switch read and write softbits for puds Date: Fri, 26 Apr 2024 13:50:55 +0200 Message-ID: <20240426115056.31768-2-imbrenda@linux.ibm.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240426115056.31768-1-imbrenda@linux.ibm.com> References: <20240426115056.31768-1-imbrenda@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-GUID: CK6Nt_4wasmbzxJ_hgb3rzilyH1N7Joz X-Proofpoint-ORIG-GUID: CK6Nt_4wasmbzxJ_hgb3rzilyH1N7Joz X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1011,Hydra:6.0.650,FMLib:17.11.176.26 definitions=2024-04-26_12,2024-04-26_02,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 suspectscore=0 clxscore=1015 mlxscore=0 bulkscore=0 spamscore=0 lowpriorityscore=0 mlxlogscore=660 adultscore=0 impostorscore=0 phishscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2404010000 definitions=main-2404260079 Content-Type: text/plain; charset="utf-8" There is no reason for the read and write softbits to be swapped in the puds compared to pmds. They are different only because the softbits for puds were introduced at the same time when the softbits for pmds were swapped. The current implementation is not wrong per se, since the macros are defined correctly; only the documentation does not reflect reality. With this patch, the read and write softbits for large pmd and large puds will have the same layout, and will match the existing documentation. Signed-off-by: Claudio Imbrenda Reviewed-by: Heiko Carstens --- arch/s390/include/asm/pgtable.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtabl= e.h index 60950e7a25f5..3da2995fd196 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -266,8 +266,8 @@ static inline int is_module_addr(void *addr) #define _REGION3_ENTRY_DIRTY 0x2000 /* SW region dirty bit */ #define _REGION3_ENTRY_YOUNG 0x1000 /* SW region young bit */ #define _REGION3_ENTRY_LARGE 0x0400 /* RTTE-format control, large page */ -#define _REGION3_ENTRY_READ 0x0002 /* SW region read bit */ -#define _REGION3_ENTRY_WRITE 0x0001 /* SW region write bit */ +#define _REGION3_ENTRY_WRITE 0x0002 /* SW region write bit */ +#define _REGION3_ENTRY_READ 0x0001 /* SW region read bit */ =20 #ifdef CONFIG_MEM_SOFT_DIRTY #define _REGION3_ENTRY_SOFT_DIRTY 0x4000 /* SW region soft dirty bit */ --=20 2.44.0