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[70.30.145.63]) by smtp.gmail.com with ESMTPSA id h26-20020ac8515a000000b003b82cb8748dsm5986545qtn.96.2023.02.05.15.17.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 05 Feb 2023 15:17:09 -0800 (PST) From: Peter Xu To: linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: peterx@redhat.com, Andrew Morton , linux-arm-kernel@lists.infradead.org, linux-s390@vger.kernel.org Subject: [PATCH 2/3] mm/arm64: Define private VM_FAULT_* reasons from top bits Date: Sun, 5 Feb 2023 18:17:03 -0500 Message-Id: <20230205231704.909536-3-peterx@redhat.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20230205231704.909536-1-peterx@redhat.com> References: <20230205231704.909536-1-peterx@redhat.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1757035216641237877?= X-GMAIL-MSGID: =?utf-8?q?1757035216641237877?= The current definition already collapse with the generic definition of vm_fault_reason. Move the private definitions to allocate bits from the top of uint so they won't collapse anymore. Signed-off-by: Peter Xu --- arch/arm64/mm/fault.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c index 596f46dabe4e..44fd16f58f94 100644 --- a/arch/arm64/mm/fault.c +++ b/arch/arm64/mm/fault.c @@ -480,8 +480,12 @@ static void do_bad_area(unsigned long far, unsigned long esr, } } -#define VM_FAULT_BADMAP 0x010000 -#define VM_FAULT_BADACCESS 0x020000 +/* + * Allocate private vm_fault_reason from top. Please make sure it won't + * collide with vm_fault_reason. + */ +#define VM_FAULT_BADMAP ((__force vm_fault_t)0x80000000) +#define VM_FAULT_BADACCESS ((__force vm_fault_t)0x40000000) static vm_fault_t __do_page_fault(struct mm_struct *mm, unsigned long addr, unsigned int mm_flags, unsigned long vm_flags,