# git rev-parse -q --verify 4c6be9192dbbe4aff7d42057d7864df8a5f3baf2^{commit} 4c6be9192dbbe4aff7d42057d7864df8a5f3baf2 already have revision, skipping fetch # git checkout -q -f -B kisskb 4c6be9192dbbe4aff7d42057d7864df8a5f3baf2 # git clean -qxdf # < git log -1 # commit 4c6be9192dbbe4aff7d42057d7864df8a5f3baf2 # Author: Nicholas Piggin # Date: Fri Sep 13 22:07:01 2019 +1000 # # powerpc/64s: system call support for scv/rfscv instructions # # Add support for the scv instruction on POWER9 and later CPUs. # # For now this implements the zeroth scv vector 'scv 0', as identical # to 'sc' system calls, with the exception that lr is not preserved, and # it is 64-bit only. There may yet be changes made to this ABI, so it's # for testing only. # # rfscv is implemented to return from scv type system calls. It can not # be used to return from sc system calls because those are defined to # preserve lr. # # In a comparison of getpid syscall, the test program had scv taking # about 3 more cycles in user mode (92 vs 89 for sc), due to lr handling. # getpid syscall throughput on POWER9 is improved by 33%, mostly due to # reducing mtmsr and mtspr. # # Signed-off-by: Nicholas Piggin # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-ld --version # < git log --format=%s --max-count=1 4c6be9192dbbe4aff7d42057d7864df8a5f3baf2 # < make -s -j 8 ARCH=powerpc O=/kisskb/build/npiggin_mpc85xx_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- mpc85xx_defconfig # < make -s -j 8 ARCH=powerpc O=/kisskb/build/npiggin_mpc85xx_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- help # make -s -j 8 ARCH=powerpc O=/kisskb/build/npiggin_mpc85xx_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- olddefconfig # make -s -j 8 ARCH=powerpc O=/kisskb/build/npiggin_mpc85xx_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- /kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl': /kisskb/src/kernel/printk/printk.c:204:16: warning: 'old' 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:72:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c:338:21: note: 'pdeo' was declared here /kisskb/src/fs/ext4/extents.c: In function 'ext4_convert_unwritten_io_end_vec': /kisskb/src/fs/ext4/extents.c:5009:23: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/mm/hugetlb.c: In function 'alloc_pool_huge_page': /kisskb/src/mm/hugetlb.c:1426:5: warning: 'page' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/kernel/trace/trace_events.c: In function 'event_create_dir': /kisskb/src/kernel/trace/trace_events.c:2040:6: warning: 'ret' 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:800:70: warning: 'j' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/sound/soc/codecs/wm8960.c:797:68: warning: 'i' 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/base/regmap/regmap.c: In function 'regmap_raw_read': /kisskb/src/drivers/base/regmap/regmap.c:2598:6: 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:1859:6: 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/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/usb/core/devio.c: In function 'async_completed': /kisskb/src/drivers/usb/core/devio.c:625:23: warning: 'errno' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/io_uring.c: In function '__io_sqe_files_update': /kisskb/src/fs/io_uring.c:5819:13: warning: 'err' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/arch/powerpc/boot/dts/fsl/mpc8541cds.dts:330.3-21: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0) /kisskb/src/arch/powerpc/boot/dts/fsl/mpc8555cds.dts:330.3-21: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0) INFO: Uncompressed kernel (size 0xc92724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc92724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc92724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc92724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc92724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc92724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc92724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc81f8c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) Image Name: Linux-5.6.0-rc2-00404-g4c6be9192 Created: Mon Mar 2 16:30:31 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6035071 Bytes = 5893.62 KiB = 5.76 MiB Load Address: 00000000 Entry Point: 00000000 INFO: Uncompressed kernel (size 0xc92724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) Image Name: Linux-5.6.0-rc2-00404-g4c6be9192 Created: Mon Mar 2 16:30:33 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6066860 Bytes = 5924.67 KiB = 5.79 MiB Load Address: 00d00000 Entry Point: 00d002a8 INFO: Uncompressed kernel (size 0xc92724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) Image Name: Linux-5.6.0-rc2-00404-g4c6be9192 Created: Mon Mar 2 16:30:33 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6068673 Bytes = 5926.44 KiB = 5.79 MiB Load Address: 00d00000 Entry Point: 00d002a8 INFO: Uncompressed kernel (size 0xc92724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) Image Name: Linux-5.6.0-rc2-00404-g4c6be9192 Created: Mon Mar 2 16:30:33 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6064825 Bytes = 5922.68 KiB = 5.78 MiB Load Address: 00d00000 Entry Point: 00d002a8 Image Name: Linux-5.6.0-rc2-00404-g4c6be9192 Created: Mon Mar 2 16:30:33 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6067401 Bytes = 5925.20 KiB = 5.79 MiB Load Address: 00d00000 Entry Point: 00d002a8 Image Name: Linux-5.6.0-rc2-00404-g4c6be9192 Created: Mon Mar 2 16:30:33 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6066891 Bytes = 5924.70 KiB = 5.79 MiB Load Address: 00d00000 Entry Point: 00d002e8 INFO: Uncompressed kernel (size 0xc92724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) Image Name: Linux-5.6.0-rc2-00404-g4c6be9192 Created: Mon Mar 2 16:30:33 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6066859 Bytes = 5924.67 KiB = 5.79 MiB Load Address: 00d00000 Entry Point: 00d002a8 INFO: Uncompressed kernel (size 0xc92724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) Image Name: Linux-5.6.0-rc2-00404-g4c6be9192 Created: Mon Mar 2 16:30:33 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6068001 Bytes = 5925.78 KiB = 5.79 MiB Load Address: 00d00000 Entry Point: 00d002a8 INFO: Uncompressed kernel (size 0xc92724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc92724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc92724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) Image Name: Linux-5.6.0-rc2-00404-g4c6be9192 Created: Mon Mar 2 16:30:34 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6068692 Bytes = 5926.46 KiB = 5.79 MiB Load Address: 00d00000 Entry Point: 00d002a8 Image Name: Linux-5.6.0-rc2-00404-g4c6be9192 Created: Mon Mar 2 16:30:35 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6064733 Bytes = 5922.59 KiB = 5.78 MiB Load Address: 00d00000 Entry Point: 00d002a8 Image Name: Linux-5.6.0-rc2-00404-g4c6be9192 Created: Mon Mar 2 16:30:35 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6064727 Bytes = 5922.58 KiB = 5.78 MiB Load Address: 00d00000 Entry Point: 00d002e8 Image Name: Linux-5.6.0-rc2-00404-g4c6be9192 Created: Mon Mar 2 16:30:36 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6066874 Bytes = 5924.68 KiB = 5.79 MiB Load Address: 00d00000 Entry Point: 00d002a8 Image Name: Linux-5.6.0-rc2-00404-g4c6be9192 Created: Mon Mar 2 16:30:36 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6064728 Bytes = 5922.59 KiB = 5.78 MiB Load Address: 00d00000 Entry Point: 00d002e8 Image Name: Linux-5.6.0-rc2-00404-g4c6be9192 Created: Mon Mar 2 16:30:36 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6066905 Bytes = 5924.71 KiB = 5.79 MiB Load Address: 00d00000 Entry Point: 00d002e8 Image Name: Linux-5.6.0-rc2-00404-g4c6be9192 Created: Mon Mar 2 16:30:36 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6067052 Bytes = 5924.86 KiB = 5.79 MiB Load Address: 00d00000 Entry Point: 00d002a8 Image Name: Linux-5.6.0-rc2-00404-g4c6be9192 Created: Mon Mar 2 16:30:36 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6064823 Bytes = 5922.68 KiB = 5.78 MiB Load Address: 00d00000 Entry Point: 00d002e8 Completed OK # rm -rf /kisskb/build/npiggin_mpc85xx_defconfig_powerpc-gcc4.6 # Build took: 0:02:41.734699