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([2601:1c0:6280:3f0::19c2]) by smtp.gmail.com with ESMTPSA id y10sm11749397pgi.54.2020.06.22.08.37.17 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 22 Jun 2020 08:37:18 -0700 (PDT) Subject: Re: mmotm 2020-06-20-21-36 uploaded (lkdtm/bugs.c) To: akpm@linux-foundation.org, broonie@kernel.org, mhocko@suse.cz, sfr@canb.auug.org.au, linux-next@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, mm-commits@vger.kernel.org, Kees Cook , "open list:KERNEL SELFTEST FRAMEWORK" References: <20200621043737.pb6JV%akpm@linux-foundation.org> From: Randy Dunlap Organization: nil Message-ID: <20a39fd4-622d-693c-c8d6-1fbab12af62a@gmail.com> Date: Mon, 22 Jun 2020 08:37:17 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 MIME-Version: 1.0 In-Reply-To: <20200621043737.pb6JV%akpm@linux-foundation.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 6/20/20 9:37 PM, akpm@linux-foundation.org wrote: > The mm-of-the-moment snapshot 2020-06-20-21-36 has been uploaded to > > http://www.ozlabs.org/~akpm/mmotm/ > > mmotm-readme.txt says > > README for mm-of-the-moment: > > http://www.ozlabs.org/~akpm/mmotm/ > > This is a snapshot of my -mm patch queue. Uploaded at random hopefully > more than once a week. drivers/misc/lkdtm/bugs.c has build errors when building UML for i386 (allmodconfig or allyesconfig): In file included from ../drivers/misc/lkdtm/bugs.c:17:0: ../arch/x86/um/asm/desc.h:7:0: warning: "LDT_empty" redefined #define LDT_empty(info) (\ In file included from ../arch/um/include/asm/mmu.h:10:0, from ../include/linux/mm_types.h:18, from ../include/linux/sched/signal.h:13, from ../drivers/misc/lkdtm/bugs.c:11: ../arch/x86/um/asm/mm_context.h:65:0: note: this is the location of the previous definition #define LDT_empty(info) (_LDT_empty(info)) ../drivers/misc/lkdtm/bugs.c: In function ‘lkdtm_DOUBLE_FAULT’: ../drivers/misc/lkdtm/bugs.c:428:9: error: variable ‘d’ has initializer but incomplete type struct desc_struct d = { ^~~~~~~~~~~ ../drivers/misc/lkdtm/bugs.c:429:4: error: ‘struct desc_struct’ has no member named ‘type’ .type = 3, /* expand-up, writable, accessed data */ ^~~~ ../drivers/misc/lkdtm/bugs.c:429:11: warning: excess elements in struct initializer .type = 3, /* expand-up, writable, accessed data */ ^ ../drivers/misc/lkdtm/bugs.c:429:11: note: (near initialization for ‘d’) ../drivers/misc/lkdtm/bugs.c:430:4: error: ‘struct desc_struct’ has no member named ‘p’ .p = 1, /* present */ ^ ../drivers/misc/lkdtm/bugs.c:430:8: warning: excess elements in struct initializer .p = 1, /* present */ ^ ../drivers/misc/lkdtm/bugs.c:430:8: note: (near initialization for ‘d’) ../drivers/misc/lkdtm/bugs.c:431:4: error: ‘struct desc_struct’ has no member named ‘d’ .d = 1, /* 32-bit */ ^ ../drivers/misc/lkdtm/bugs.c:431:8: warning: excess elements in struct initializer .d = 1, /* 32-bit */ ^ ../drivers/misc/lkdtm/bugs.c:431:8: note: (near initialization for ‘d’) ../drivers/misc/lkdtm/bugs.c:432:4: error: ‘struct desc_struct’ has no member named ‘g’ .g = 0, /* limit in bytes */ ^ ../drivers/misc/lkdtm/bugs.c:432:8: warning: excess elements in struct initializer .g = 0, /* limit in bytes */ ^ ../drivers/misc/lkdtm/bugs.c:432:8: note: (near initialization for ‘d’) ../drivers/misc/lkdtm/bugs.c:433:4: error: ‘struct desc_struct’ has no member named ‘s’ .s = 1, /* not system */ ^ ../drivers/misc/lkdtm/bugs.c:433:8: warning: excess elements in struct initializer .s = 1, /* not system */ ^ ../drivers/misc/lkdtm/bugs.c:433:8: note: (near initialization for ‘d’) ../drivers/misc/lkdtm/bugs.c:428:21: error: storage size of ‘d’ isn’t known struct desc_struct d = { ^ ../drivers/misc/lkdtm/bugs.c:437:2: error: implicit declaration of function ‘write_gdt_entry’; did you mean ‘init_wait_entry’? [-Werror=implicit-function-declaration] write_gdt_entry(get_cpu_gdt_rw(smp_processor_id()), ^~~~~~~~~~~~~~~ init_wait_entry ../drivers/misc/lkdtm/bugs.c:437:18: error: implicit declaration of function ‘get_cpu_gdt_rw’; did you mean ‘get_cpu_ptr’? [-Werror=implicit-function-declaration] write_gdt_entry(get_cpu_gdt_rw(smp_processor_id()), ^~~~~~~~~~~~~~ get_cpu_ptr ../drivers/misc/lkdtm/bugs.c:438:27: error: ‘DESCTYPE_S’ undeclared (first use in this function) GDT_ENTRY_TLS_MIN, &d, DESCTYPE_S); ^~~~~~~~~~ ../drivers/misc/lkdtm/bugs.c:438:27: note: each undeclared identifier is reported only once for each function it appears in ../drivers/misc/lkdtm/bugs.c:428:21: warning: unused variable ‘d’ [-Wunused-variable] struct desc_struct d = { ^ cc1: some warnings being treated as errors -- ~Randy Reported-by: Randy Dunlap