# git rev-parse -q --verify 7c8db8431b5bc1c37f6d2ce73d2e18a42b52c87d^{commit} 7c8db8431b5bc1c37f6d2ce73d2e18a42b52c87d already have revision, skipping fetch # git checkout -q -f -B kisskb 7c8db8431b5bc1c37f6d2ce73d2e18a42b52c87d # git clean -qxdf # < git log -1 # commit 7c8db8431b5bc1c37f6d2ce73d2e18a42b52c87d # Author: Michael Ellerman # Date: Thu Apr 12 22:24:45 2018 +1000 # # powerpc/64s: Fix CPU_FTRS_ALWAYS vs DT CPU features # # The cpu_has_feature() mechanism has an optimisation where at build # time we construct a mask of the CPU feature bits that will always be # true for the given .config, based on the platform/bitness/etc. that we # are building for. # # That is incompatible with DT CPU features, where the set of CPU # features is dependent on feature flags that are given to us by # firmware. # # The result is that some feature bits can not be *disabled* by DT CPU # features. Or more accurately, they can be disabled but they will still # appear in the ALWAYS mask, meaning cpu_has_feature() will always # return true for them. # # In the past this hasn't really been a problem because on Book3S # 64 (where we support DT CPU features), the set of ALWAYS bits has been # very small. That was because we always built for POWER4 and later, # meaning the set of common bits was small. # # The only bit that could be cleared by DT CPU features that was also in # the ALWAYS mask was CPU_FTR_NODSISRALIGN, and that was only used in # the alignment handler to create a fake DSISR. That code was itself # deleted in 31bfdb036f12 ("powerpc: Use instruction emulation # infrastructure to handle alignment faults") (Sep 2017). # # However the set of ALWAYS features changed with the recent commit # db5ae1c155af ("powerpc/64s: Refine feature sets for little endian # builds") which restricted the set of feature flags when building # little endian to Power7 or later. That caused the ALWAYS mask to # become much larger for little endian builds. # # The result is that the following feature bits can currently not # be *disabled* by DT CPU features: # # CPU_FTR_REAL_LE, CPU_FTR_MMCRA, CPU_FTR_CTRL, CPU_FTR_SMT, # CPU_FTR_PURR, CPU_FTR_SPURR, CPU_FTR_DSCR, CPU_FTR_PKEY, # CPU_FTR_VMX_COPY, CPU_FTR_CFAR, CPU_FTR_HAS_PPR. # # To fix it we need to mask the set of ALWAYS features with the base set # of DT CPU features, ie. the features that are always enabled by DT CPU # features. That way there are no bits in the ALWAYS mask that are not # also always set by DT CPU features. # # Fixes: db5ae1c155af ("powerpc/64s: Refine feature sets for little endian builds") # Signed-off-by: Michael Ellerman # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version # < git log --format=%s --max-count=1 7c8db8431b5bc1c37f6d2ce73d2e18a42b52c87d # < make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc85xx_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- mpc85xx_defconfig # make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc85xx_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- /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/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl': /kisskb/src/kernel/printk/printk.c:182:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/base/regmap/regmap.c: In function 'regmap_raw_read': /kisskb/src/drivers/base/regmap/regmap.c:2497:6: 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:1819:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/kernel/cgroup/cgroup-v1.c: In function 'cgroup1_mount': /kisskb/src/kernel/cgroup/cgroup-v1.c:1268:20: warning: 'root' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/sound/soc/codecs/wm8960.c: In function 'wm8960_configure_clocking': /kisskb/src/sound/soc/codecs/wm8960.c:803:70: warning: 'j' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/sound/soc/codecs/wm8960.c:800:68: warning: 'i' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c: In function 'allocate_bd': /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c:139:6: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] /kisskb/src/drivers/tty/serial/8250/8250_core.c: In function 'univ8250_release_irq': /kisskb/src/drivers/tty/serial/8250/8250_core.c:251:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/tty/serial/8250/8250_core.c:231:19: note: 'i' was declared here arch/powerpc/boot/mpc8555cds.dtb: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0) arch/powerpc/boot/mpc8541cds.dtb: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0) arch/powerpc/boot/tqm8548.dtb: Warning (pci_bridge): /pcie@e000a000/pcie@0: missing bus-range for PCI bridge arch/powerpc/boot/tqm8548.dtb: Warning (pci_device_bus_num): Failed prerequisite 'pci_bridge' arch/powerpc/boot/mpc8548cds_32b.dtb: Warning (pci_bridge): /pcie@e000a000/pcie@0: missing bus-range for PCI bridge arch/powerpc/boot/mpc8548cds_32b.dtb: Warning (pci_device_bus_num): Failed prerequisite 'pci_bridge' arch/powerpc/boot/mpc8544ds.dtb: Warning (pci_bridge): /pcie@e0009000/pcie@0: missing bus-range for PCI bridge arch/powerpc/boot/mpc8544ds.dtb: Warning (pci_bridge): /pcie@e000a000/pcie@0: missing bus-range for PCI bridge arch/powerpc/boot/mpc8544ds.dtb: Warning (pci_bridge): /pcie@e000b000/pcie@0: missing bus-range for PCI bridge arch/powerpc/boot/mpc8544ds.dtb: Warning (pci_device_bus_num): Failed prerequisite 'pci_bridge' arch/powerpc/boot/sbc8548.dtb: Warning (pci_bridge): /pcie@e000a000/pcie@0: missing bus-range for PCI bridge arch/powerpc/boot/sbc8548.dtb: Warning (pci_device_bus_num): Failed prerequisite 'pci_bridge' arch/powerpc/boot/mpc8568mds.dtb: Warning (pci_bridge): arch/powerpc/boot/mpc8572ds.dtb: Warning (pci_bridge): /pcie@e000a000/pcie@0/pcie@ffe08000/pcie@0: : missing bus-range for PCI bridgemissing bus-range for PCI bridge arch/powerpc/boot/mpc8568mds.dtb: Warning (pci_device_bus_num): arch/powerpc/boot/mpc8572ds.dtb: Warning (pci_bridge): Failed prerequisite 'pci_bridge'/pcie@ffe09000/pcie@0 : missing bus-range for PCI bridge arch/powerpc/boot/mpc8572ds.dtb: Warning (pci_bridge): /pcie@ffe0a000/pcie@0: missing bus-range for PCI bridge arch/powerpc/boot/mpc8572ds.dtb: Warning (pci_device_bus_num): Failed prerequisite 'pci_bridge' INFO: Uncompressed kernel (size 0xb593dc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb593dc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb593dc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb593dc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb593dc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb593dc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb593dc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb593dc) overlaps the address of the wrapper(0x400000) INFO: Uncompressed kernel (size 0xb593dc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb593dc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb593dc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb593dc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb593dc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb593dc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb593dc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb48c90) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) Image Name: Linux-4.16.0-g7c8db84 Created: Fri Apr 13 00:14:47 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5491630 Bytes = 5362.92 kB = 5.24 MB Load Address: 00c00000 Entry Point: 00c00248 Image Name: Linux-4.16.0-g7c8db84 Created: Fri Apr 13 00:14:47 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5493503 Bytes = 5364.75 kB = 5.24 MB Load Address: 00c00000 Entry Point: 00c00248 Image Name: Linux-4.16.0-g7c8db84 Created: Fri Apr 13 00:14:47 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5491377 Bytes = 5362.67 kB = 5.24 MB Load Address: 00c00000 Entry Point: 00c00248 Image Name: Linux-4.16.0-g7c8db84 Created: Fri Apr 13 00:14:47 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5490652 Bytes = 5361.96 kB = 5.24 MB Load Address: 00c00000 Entry Point: 00c00288 Image Name: Linux-4.16.0-g7c8db84 Created: Fri Apr 13 00:14:47 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5491132 Bytes = 5362.43 kB = 5.24 MB Load Address: 00c00000 Entry Point: 00c00248 Image Name: Linux-4.16.0-g7c8db84 Created: Fri Apr 13 00:14:47 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5491091 Bytes = 5362.39 kB = 5.24 MB Load Address: 00c00000 Entry Point: 00c00288 Image Name: Linux-4.16.0-g7c8db84 Created: Fri Apr 13 00:14:47 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5493491 Bytes = 5364.74 kB = 5.24 MB Load Address: 00c00000 Entry Point: 00c00248 Image Name: Linux-4.16.0-g7c8db84 Created: Fri Apr 13 00:14:47 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5490957 Bytes = 5362.26 kB = 5.24 MB Load Address: 00c00000 Entry Point: 00c00248 Image Name: Linux-4.16.0-g7c8db84 Created: Fri Apr 13 00:14:47 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5491089 Bytes = 5362.39 kB = 5.24 MB Load Address: 00c00000 Entry Point: 00c00288 Image Name: Linux-4.16.0-g7c8db84 Created: Fri Apr 13 00:14:47 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5467833 Bytes = 5339.68 kB = 5.21 MB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-4.16.0-g7c8db84 Created: Fri Apr 13 00:14:47 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5491122 Bytes = 5362.42 kB = 5.24 MB Load Address: 00c00000 Entry Point: 00c00288 Image Name: Linux-4.16.0-g7c8db84 Created: Fri Apr 13 00:14:47 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5491035 Bytes = 5362.34 kB = 5.24 MB Load Address: 00c00000 Entry Point: 00c00288 Image Name: Linux-4.16.0-g7c8db84 Created: Fri Apr 13 00:14:47 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5492243 Bytes = 5363.52 kB = 5.24 MB Load Address: 00c00000 Entry Point: 00c00248 Image Name: Linux-4.16.0-g7c8db84 Created: Fri Apr 13 00:14:47 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5492405 Bytes = 5363.68 kB = 5.24 MB Load Address: 00c00000 Entry Point: 00c00248 Image Name: Linux-4.16.0-g7c8db84 Created: Fri Apr 13 00:14:47 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5490665 Bytes = 5361.98 kB = 5.24 MB Load Address: 00c00000 Entry Point: 00c00248 Image Name: Linux-4.16.0-g7c8db84 Created: Fri Apr 13 00:14:47 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5490664 Bytes = 5361.98 kB = 5.24 MB Load Address: 00c00000 Entry Point: 00c00248 Completed OK # rm -rf /kisskb/build/powerpc-fixes_mpc85xx_defconfig_powerpc # Build took: 0:01:37.619969