Buildresult: powerpc-fixes/ppc64_defconfig+UP/powerpc-gcc4.6 built on Nov 8 2018, 00:07

kisskb

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Status:	OK
Date/Time:	Nov 8 2018, 00:07
Duration:	0:01:02.409653
Builder:	ka4
Revision:	powerpc/io: Fix the IO workarounds code to work with Radix (`6d3350efdc57b346112536c8e413e88940233642)`
Target:	powerpc-fixes/ppc64_defconfig+UP/powerpc-gcc4.6
Branch:	powerpc-fixes
Compiler:	powerpc-gcc4.6 (powerpc-linux-gcc (GCC) 4.6.3)
Config:	ppc64_defconfig+UP (download)
Log:	Download original Possible warnings (13) kernel/cgroup/cgroup-v1.c:1256:20: warning: 'root' may be used uninitialized in this function [-Wuninitialized] kernel/printk/printk.c:186:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] fs/nfsd/nfs4xdr.c:2076:9: warning: 'str' may be used uninitialized in this function [-Wuninitialized] mm/hugetlb.c:1433:5: warning: 'page' may be used uninitialized in this function [-Wuninitialized] include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] drivers/base/regmap/regmap.c:2594:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] drivers/base/regmap/regmap.c:1855:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] net/bridge/br_netlink.c:647:7: warning: 'err' may be used uninitialized in this function [-Wuninitialized] drivers/i2c/i2c-core-base.c:235:5: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] fs/udf/unicode.c:132:8: warning: 'c' may be used uninitialized in this function [-Wuninitialized] drivers/tty/serial/8250/8250_core.c:247:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized] drivers/net/tun.c:1819:30: warning: 'copylen' may be used uninitialized in this function [-Wuninitialized] drivers/net/tun.c:1729:46: warning: 'linear' may be used uninitialized in this function [-Wuninitialized] Full Log # git rev-parse -q --verify 6d3350efdc57b346112536c8e413e88940233642^{commit} 6d3350efdc57b346112536c8e413e88940233642 already have revision, skipping fetch # git checkout -q -f -B kisskb 6d3350efdc57b346112536c8e413e88940233642 # git clean -qxdf # < git log -1 # commit 6d3350efdc57b346112536c8e413e88940233642 # Author: Michael Ellerman <mpe@ellerman.id.au> # Date: Tue Nov 6 23:37:58 2018 +1100 # # powerpc/io: Fix the IO workarounds code to work with Radix # # Back in 2006 Ben added some workarounds for a misbehaviour in the # Spider IO bridge used on early Cell machines, see commit # 014da7ff47b5 ("[POWERPC] Cell "Spider" MMIO workarounds"). Later these # were made to be generic, ie. not tied specifically to Spider. # # The code stashes a token in the high bits (59-48) of virtual addresses # used for IO (eg. returned from ioremap()). This works fine when using # the Hash MMU, but when we're using the Radix MMU the bits used for the # token overlap with some of the bits of the virtual address. # # This is because the maximum virtual address is larger with Radix, up # to c00fffffffffffff, and in fact we use that high part of the address # range for ioremap(), see RADIX_KERN_IO_START. # # As it happens the bits that are used overlap with the bits that # differentiate an IO address vs a linear map address. If the resulting # address lies outside the linear mapping we will crash (see below), if # not we just corrupt memory. # # virtio-pci 0000:00:00.0: Using 64-bit direct DMA at offset 800000000000000 # Unable to handle kernel paging request for data at address 0xc000000080000014 # ... # CFAR: c000000000626b98 DAR: c000000080000014 DSISR: 42000000 IRQMASK: 0 # GPR00: c0000000006c54fc c00000003e523378 c0000000016de600 0000000000000000 # GPR04: c00c000080000014 0000000000000007 0fffffff000affff 0000000000000030 # ^^^^ # ... # NIP [c000000000626c5c] .iowrite8+0xec/0x100 # LR [c0000000006c992c] .vp_reset+0x2c/0x90 # Call Trace: # .pci_bus_read_config_dword+0xc4/0x120 (unreliable) # .register_virtio_device+0x13c/0x1c0 # .virtio_pci_probe+0x148/0x1f0 # .local_pci_probe+0x68/0x140 # .pci_device_probe+0x164/0x220 # .really_probe+0x274/0x3b0 # .driver_probe_device+0x80/0x170 # .__driver_attach+0x14c/0x150 # .bus_for_each_dev+0xb8/0x130 # .driver_attach+0x34/0x50 # .bus_add_driver+0x178/0x2f0 # .driver_register+0x90/0x1a0 # .__pci_register_driver+0x6c/0x90 # .virtio_pci_driver_init+0x2c/0x40 # .do_one_initcall+0x64/0x280 # .kernel_init_freeable+0x36c/0x474 # .kernel_init+0x24/0x160 # .ret_from_kernel_thread+0x58/0x7c # # This hasn't been a problem because CONFIG_PPC_IO_WORKAROUNDS which # enables this code is usually not enabled. It is only enabled when it's # selected by PPC_CELL_NATIVE which is only selected by # PPC_IBM_CELL_BLADE and that in turn depends on BIG_ENDIAN. So in order # to hit the bug you need to build a big endian kernel, with IBM Cell # Blade support enabled, as well as Radix MMU support, and then boot # that on Power9 using Radix MMU. # # Still we can fix the bug, so let's do that. We simply use fewer bits # for the token, taking the union of the restrictions on the address # from both Hash and Radix, we end up with 8 bits we can use for the # token. The only user of the token is iowa_mem_find_bus() which only # supports 8 token values, so 8 bits is plenty for that. # # Fixes: 566ca99af026 ("powerpc/mm/radix: Add dummy radix_enabled()") # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version # < git log --format=%s --max-count=1 6d3350efdc57b346112536c8e413e88940233642 # < make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc64_defconfig+UP_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- ppc64_defconfig # Added to kconfig CONFIG_SMP=n # yes \n \| make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc64_defconfig+UP_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- oldconfig yes: standard output: Broken pipe # make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc64_defconfig+UP_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- /kisskb/src/kernel/cgroup/cgroup-v1.c: In function 'cgroup1_mount': /kisskb/src/kernel/cgroup/cgroup-v1.c:1256:20: warning: 'root' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl': /kisskb/src/kernel/printk/printk.c:186:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/nfsd/nfs4xdr.c: In function 'nfsd4_encode_components_esc': /kisskb/src/fs/nfsd/nfs4xdr.c:2076:9: warning: 'str' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/mm/hugetlb.c: In function 'alloc_pool_huge_page': /kisskb/src/mm/hugetlb.c:1433:5: warning: 'page' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c: In function 'proc_reg_open': /kisskb/src/include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c:341:21: note: 'pdeo' was declared here /kisskb/src/drivers/base/regmap/regmap.c: In function 'regmap_raw_read': /kisskb/src/drivers/base/regmap/regmap.c:2594:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/base/regmap/regmap.c: In function '_regmap_raw_write': /kisskb/src/drivers/base/regmap/regmap.c:1855:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/bridge/br_netlink.c: In function 'br_afspec': /kisskb/src/net/bridge/br_netlink.c:647:7: warning: 'err' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/i2c/i2c-core-base.c: In function 'i2c_generic_scl_recovery': /kisskb/src/drivers/i2c/i2c-core-base.c:235:5: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/udf/unicode.c: In function 'udf_name_conv_char': /kisskb/src/fs/udf/unicode.c:132:8: warning: 'c' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/tty/serial/8250/8250_core.c: In function 'univ8250_release_irq': /kisskb/src/drivers/tty/serial/8250/8250_core.c:247:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/tty/serial/8250/8250_core.c:227:19: note: 'i' was declared here /kisskb/src/drivers/net/tun.c: In function 'tun_get_user': /kisskb/src/drivers/net/tun.c:1819:30: warning: 'copylen' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/net/tun.c:1729:46: warning: 'linear' may be used uninitialized in this function [-Wuninitialized] Completed OK # rm -rf /kisskb/build/powerpc-fixes_ppc64_defconfig+UP_powerpc # Build took: 0:01:02.409653

© Michael Ellerman 2006-2018.