# git rev-parse -q --verify 7fd5004bbade1bf77fbb7e73b2b5a9eda1e892ea^{commit} 7fd5004bbade1bf77fbb7e73b2b5a9eda1e892ea already have revision, skipping fetch # git checkout -q -f -B kisskb 7fd5004bbade1bf77fbb7e73b2b5a9eda1e892ea # git clean -qxdf # < git log -1 # commit 7fd5004bbade1bf77fbb7e73b2b5a9eda1e892ea # Author: Christophe Leroy # Date: Sat Jan 11 19:20:49 2020 +0000 # # powerpc/vdso: Switch VDSO to generic C implementation. # # For VDSO32 on PPC64, we create a fake 32 bits config, on the same # principle as MIPS architecture, in order to get the correct parts of # the different asm header files. # # With the C VDSO, the performance is slightly lower, but it is worth # it as it will ease maintenance and evolution, and also brings clocks # that are not supported with the ASM VDSO. # # On an 8xx at 132 MHz, vdsotest with the ASM VDSO: # gettimeofday: vdso: 828 nsec/call # clock-getres-realtime-coarse: vdso: 391 nsec/call # clock-gettime-realtime-coarse: vdso: 614 nsec/call # clock-getres-realtime: vdso: 460 nsec/call # clock-gettime-realtime: vdso: 876 nsec/call # clock-getres-monotonic-coarse: vdso: 399 nsec/call # clock-gettime-monotonic-coarse: vdso: 691 nsec/call # clock-getres-monotonic: vdso: 460 nsec/call # clock-gettime-monotonic: vdso: 1026 nsec/call # # On an 8xx at 132 MHz, vdsotest with the C VDSO: # gettimeofday: vdso: 955 nsec/call # clock-getres-realtime-coarse: vdso: 545 nsec/call # clock-gettime-realtime-coarse: vdso: 592 nsec/call # clock-getres-realtime: vdso: 545 nsec/call # clock-gettime-realtime: vdso: 941 nsec/call # clock-getres-monotonic-coarse: vdso: 545 nsec/call # clock-gettime-monotonic-coarse: vdso: 591 nsec/call # clock-getres-monotonic: vdso: 545 nsec/call # clock-gettime-monotonic: vdso: 940 nsec/call # # It is even better for gettime with monotonic clocks. # # Unsupported clocks with ASM VDSO: # clock-gettime-boottime: vdso: 3851 nsec/call # clock-gettime-tai: vdso: 3852 nsec/call # clock-gettime-monotonic-raw: vdso: 3396 nsec/call # # Same clocks with C VDSO: # clock-gettime-tai: vdso: 941 nsec/call # clock-gettime-monotonic-raw: vdso: 1001 nsec/call # clock-gettime-monotonic-coarse: vdso: 591 nsec/call # # On an 8321E at 333 MHz, vdsotest with the ASM VDSO: # gettimeofday: vdso: 220 nsec/call # clock-getres-realtime-coarse: vdso: 102 nsec/call # clock-gettime-realtime-coarse: vdso: 178 nsec/call # clock-getres-realtime: vdso: 129 nsec/call # clock-gettime-realtime: vdso: 235 nsec/call # clock-getres-monotonic-coarse: vdso: 105 nsec/call # clock-gettime-monotonic-coarse: vdso: 208 nsec/call # clock-getres-monotonic: vdso: 129 nsec/call # clock-gettime-monotonic: vdso: 274 nsec/call # # On an 8321E at 333 MHz, vdsotest with the C VDSO: # gettimeofday: vdso: 272 nsec/call # clock-getres-realtime-coarse: vdso: 160 nsec/call # clock-gettime-realtime-coarse: vdso: 184 nsec/call # clock-getres-realtime: vdso: 166 nsec/call # clock-gettime-realtime: vdso: 281 nsec/call # clock-getres-monotonic-coarse: vdso: 160 nsec/call # clock-gettime-monotonic-coarse: vdso: 184 nsec/call # clock-getres-monotonic: vdso: 169 nsec/call # clock-gettime-monotonic: vdso: 275 nsec/call # # Signed-off-by: Christophe Leroy # --- # v7: # - Split out preparatory changes in a new preceding patch # - Added -fasynchronous-unwind-tables to CC flags. # # v6: # - Added missing prototypes in asm/vdso/gettimeofday.h for __c_kernel_ functions. # - Using STACK_FRAME_OVERHEAD instead of INT_FRAME_SIZE # - Rebased on powerpc/merge as of 7 Apr 2020 # - Fixed build failure with gcc 9 # - Added a patch to create asm/vdso/processor.h and more cpu_relax() in it # < /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 7fd5004bbade1bf77fbb7e73b2b5a9eda1e892ea # < make -s -j 80 ARCH=powerpc O=/kisskb/build/chleroy_ppc6xx_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- ppc6xx_defconfig # < make -s -j 80 ARCH=powerpc O=/kisskb/build/chleroy_ppc6xx_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- help # make -s -j 80 ARCH=powerpc O=/kisskb/build/chleroy_ppc6xx_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- olddefconfig # make -s -j 80 ARCH=powerpc O=/kisskb/build/chleroy_ppc6xx_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:471:21: note: 'pdeo' was declared here /kisskb/src/kernel/trace/ftrace.c: In function 'pid_open': /kisskb/src/kernel/trace/ftrace.c:7166:6: warning: 'seq_ops' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/kernel/trace/ftrace.c: In function 'pid_write': /kisskb/src/kernel/trace/ftrace.c:7261:22: warning: 'other_pids' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/kernel/trace/ftrace.c:7244:6: warning: 'filtered_pids' 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:2189:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/ext4/extents.c: In function 'ext4_convert_unwritten_io_end_vec': /kisskb/src/fs/ext4/extents.c:4774:23: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/sound/ppc/awacs.c: In function 'snd_pmac_awacs_init': /kisskb/src/include/sound/control.h:218:2: warning: 'speaker_vol' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/sound/ppc/awacs.c:873:36: note: 'speaker_vol' was declared here /kisskb/src/fs/gfs2/lops.c: In function 'gfs2_find_jhead': /kisskb/src/fs/gfs2/lops.c:568:8: warning: 'off' 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/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/fs/namei.c: In function 'handle_dots': /kisskb/src/fs/namei.c:1805:10: warning: 'inode' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/namei.c:1805:10: warning: 'seq' 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: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/nfsd/nfs4xdr.c: In function 'nfsd4_encode_components_esc': /kisskb/src/fs/nfsd/nfs4xdr.c:2151:9: warning: 'str' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/bridge/br_netlink.c: In function 'br_process_vlan_info': /kisskb/src/net/bridge/br_netlink.c:571:6: warning: 'err' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/drm_dp_mst_topology.c: In function 'drm_dp_mst_dsc_aux_for_port': /kisskb/src/drivers/gpu/drm/drm_dp_mst_topology.c:5497:9: warning: missing braces around initializer [-Wmissing-braces] /kisskb/src/drivers/gpu/drm/drm_dp_mst_topology.c:5497:9: warning: (near initialization for 'desc.ident') [-Wmissing-braces] /kisskb/src/fs/io_uring.c: In function '__io_sqe_files_update.isra.70': /kisskb/src/fs/io_uring.c:6673:13: warning: 'err' may be used uninitialized in this function [-Wuninitialized] /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/drivers/net/tun.c: In function 'tun_get_user': /kisskb/src/drivers/net/tun.c:1801:30: warning: 'copylen' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/net/tun.c:1714:46: warning: 'linear' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/mac80211/mlme.c: In function 'ieee80211_rx_mgmt_beacon': /kisskb/src/net/mac80211/mlme.c:1603:3: warning: 'pwr_level_cisco' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/mac80211/mlme.c:1560:6: note: 'pwr_level_cisco' was declared here INFO: Uncompressed kernel (size 0xa2a388) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa2a388) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa2a388) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa2a388) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa2a388) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa2a388) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa2a388) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa2a388) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa2a388) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa2a388) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa19cd4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa19cd4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) Image Name: Linux-5.7.0-rc1+ Created: Fri Apr 17 00:16:56 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4812685 Bytes = 4699.89 KiB = 4.59 MiB Load Address: 00b00000 Entry Point: 00b00290 Image Name: Linux-5.7.0-rc1+ Created: Fri Apr 17 00:16:56 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4782056 Bytes = 4669.98 KiB = 4.56 MiB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-5.7.0-rc1+ Created: Fri Apr 17 00:16:56 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4813143 Bytes = 4700.33 KiB = 4.59 MiB Load Address: 00b00000 Entry Point: 00b00888 Image Name: Linux-5.7.0-rc1+ Created: Fri Apr 17 00:16:56 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4812847 Bytes = 4700.05 KiB = 4.59 MiB Load Address: 00b00000 Entry Point: 00b00888 Image Name: Linux-5.7.0-rc1+ Created: Fri Apr 17 00:16:56 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4812498 Bytes = 4699.71 KiB = 4.59 MiB Load Address: 00b00000 Entry Point: 00b00290 Image Name: Linux-5.7.0-rc1+ Created: Fri Apr 17 00:16:56 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4812757 Bytes = 4699.96 KiB = 4.59 MiB Load Address: 00b00000 Entry Point: 00b00290 Image Name: Linux-5.7.0-rc1+ Created: Fri Apr 17 00:16:56 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4812600 Bytes = 4699.80 KiB = 4.59 MiB Load Address: 00b00000 Entry Point: 00b00290 Image Name: Linux-5.7.0-rc1+ Created: Fri Apr 17 00:16:56 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4812443 Bytes = 4699.65 KiB = 4.59 MiB Load Address: 00b00000 Entry Point: 00b00290 Image Name: Linux-5.7.0-rc1+ Created: Fri Apr 17 00:16:56 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4812137 Bytes = 4699.35 KiB = 4.59 MiB Load Address: 00b00000 Entry Point: 00b00290 Completed OK # rm -rf /kisskb/build/chleroy_ppc6xx_defconfig_powerpc-gcc4.6 # Build took: 0:03:05.939205