# git rev-parse -q --verify 34f0ee3c18c1ba6b31eea86c1e154ef1a7f31d56^{commit} 34f0ee3c18c1ba6b31eea86c1e154ef1a7f31d56 already have revision, skipping fetch # git checkout -q -f -B kisskb 34f0ee3c18c1ba6b31eea86c1e154ef1a7f31d56 # git clean -qxdf # < git log -1 # commit 34f0ee3c18c1ba6b31eea86c1e154ef1a7f31d56 # Author: Gautham R. Shenoy # Date: Tue Jul 17 16:57:29 2018 +0530 # # powerpc/powernv: Save & Restore SPRG3 on entry/exit from stop (idle) # # On 64-bit Servers, SPRN_SPRG3 and its userspace read-only mirror # SPRN_USPRG3 are used as userspace VDSO write and read registers # respectively. # # SPRN_SPRG3 is lost when we enter stop4 and above, and is currently not # restored. As a result, any read from SPRN_USPRG3 returns zero on an # exit from stop4 and above. This affects Power9 only. # # Thus in this situation, any call from sched_getcpu() always returns # zero, as on powerpc, we call __kernel_getcpu() which relies upon # SPRN_USPRG3 to report the CPU and NUMA node information. # # Fix this by saving the SPRN_SPRG3 before entering a deep stop state, # and restoring it back on wakeup from the stop state. # # Fixes: e1c1cfed5432 ("powerpc/powernv: Save/Restore additional SPRs for stop4 cpuidle") # Cc: stable@vger.kernel.org # v4.14+ # Reported-by: Florian Weimer # Signed-off-by: Gautham R. Shenoy # 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 34f0ee3c18c1ba6b31eea86c1e154ef1a7f31d56 # < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc6xx_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- ppc6xx_defconfig # make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc6xx_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- /kisskb/src/net/Makefile:24: CC cannot link executables. Skipping bpfilter. /kisskb/src/net/Makefile:24: CC cannot link executables. Skipping bpfilter. /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:183:16: 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/net/bridge/br_netlink.c: In function 'br_afspec': /kisskb/src/net/bridge/br_netlink.c:637:7: warning: 'err' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/dma-buf/reservation.c: In function 'reservation_object_add_shared_fence': /kisskb/src/drivers/dma-buf/reservation.c:225:6: warning: 'k' 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:223:2: warning: 'speaker_vol' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/sound/ppc/awacs.c:886:36: note: 'speaker_vol' was declared here /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 /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:339:21: note: 'pdeo' was declared here /kisskb/src/net/mac80211/mlme.c: In function 'ieee80211_rx_mgmt_beacon': /kisskb/src/net/mac80211/mlme.c:1353:3: warning: 'pwr_level_cisco' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/mac80211/mlme.c:1310:6: note: 'pwr_level_cisco' was declared here /kisskb/src/fs/nfsd/nfs4xdr.c: In function 'nfsd4_encode_components_esc': /kisskb/src/fs/nfsd/nfs4xdr.c:2046:9: warning: 'str' 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/tun.c: In function 'tun_get_user': /kisskb/src/drivers/net/tun.c:1835:30: warning: 'copylen' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/net/tun.c:1745:46: warning: 'linear' may be used uninitialized in this function [-Wuninitialized] arch/powerpc/boot/mpc832x_rdb.dtb: Warning (interrupts_property): /qe@e0100000/mdio@3120/ethernet-phy@0:#interrupt-cells: size is (4), expected multiple of 8 arch/powerpc/boot/mpc832x_rdb.dtb: Warning (interrupts_property): /qe@e0100000/mdio@3120/ethernet-phy@4:#interrupt-cells: size is (4), expected multiple of 8 INFO: Uncompressed kernel (size 0xa4b1b0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa4b1b0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa4b1b0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa4b1b0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa4b1b0) overlaps the address of the wrapper(0x400000) INFO: Uncompressed kernel (size 0xa4b1b0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa4b1b0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa4b1b0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) Image Name: Linux-4.18.0-rc3+ Created: Wed Jul 18 00:29:07 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4896627 Bytes = 4781.86 kB = 4.67 MB Load Address: 00b00000 Entry Point: 00b007a0 Image Name: Linux-4.18.0-rc3+ Created: Wed Jul 18 00:29:07 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4896130 Bytes = 4781.38 kB = 4.67 MB Load Address: 00b00000 Entry Point: 00b00230 Image Name: Linux-4.18.0-rc3+ Created: Wed Jul 18 00:29:07 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4896450 Bytes = 4781.69 kB = 4.67 MB Load Address: 00b00000 Entry Point: 00b00230 INFO: Uncompressed kernel (size 0xa4b1b0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa3aa8c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa4b1b0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xa3aa8c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) Image Name: Linux-4.18.0-rc3+ Created: Wed Jul 18 00:29:10 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4872308 Bytes = 4758.11 kB = 4.65 MB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-4.18.0-rc3+ Created: Wed Jul 18 00:29:11 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4895210 Bytes = 4780.48 kB = 4.67 MB Load Address: 00b00000 Entry Point: 00b00230 Image Name: Linux-4.18.0-rc3+ Created: Wed Jul 18 00:29:12 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4894965 Bytes = 4780.24 kB = 4.67 MB Load Address: 00b00000 Entry Point: 00b00230 Image Name: Linux-4.18.0-rc3+ Created: Wed Jul 18 00:29:12 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4896118 Bytes = 4781.37 kB = 4.67 MB Load Address: 00b00000 Entry Point: 00b00230 Image Name: Linux-4.18.0-rc3+ Created: Wed Jul 18 00:29:12 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4895908 Bytes = 4781.16 kB = 4.67 MB Load Address: 00b00000 Entry Point: 00b00230 Image Name: Linux-4.18.0-rc3+ Created: Wed Jul 18 00:29:13 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4896962 Bytes = 4782.19 kB = 4.67 MB Load Address: 00b00000 Entry Point: 00b007a0 Completed OK # rm -rf /kisskb/build/powerpc-fixes_ppc6xx_defconfig_powerpc # Build took: 0:02:49.686745