# git rev-parse -q --verify 4b820e167bf6f410ace479d8df5b15a574000e75^{commit} 4b820e167bf6f410ace479d8df5b15a574000e75 already have revision, skipping fetch # git checkout -q -f -B kisskb 4b820e167bf6f410ace479d8df5b15a574000e75 # git clean -qxdf # < git log -1 # commit 4b820e167bf6f410ace479d8df5b15a574000e75 # Author: Linus Torvalds # Date: Fri Jul 2 22:05:52 2021 -0700 # # Revert "ALSA: usb-audio: Reduce latency at playback start" # # This reverts commit 9ce650a75a3b262c90789b42aedee8fc2ee04d53. # # This commit causes watchdog lockups on my machine, and while I have no # idea what the cause is, it bisected right to this commit, and reverting # the change promptly fixes it. # # At least occasionally one of the watchdog call traces was # # Call Trace: # _raw_spin_lock_irqsave+0x35/0x40 # snd_pcm_period_elapsed+0x1b/0xa0 [snd_pcm] # snd_usb_endpoint_start+0x1a0/0x3c0 [snd_usb_audio] # start_endpoints+0x23/0x90 [snd_usb_audio] # snd_usb_substream_playback_trigger+0x7b/0x1a0 [snd_usb_audio] # snd_pcm_common_ioctl+0x1c44/0x2360 [snd_pcm] # snd_pcm_ioctl+0x2e/0x40 [snd_pcm] # __se_sys_ioctl+0x72/0xc0 # do_syscall_64+0x4c/0xa0 # entry_SYSCALL_64_after_hwframe+0x44/0xae # # so presumably it's a locking error on that substream spinlock that # snd_pcm_period_elapsed() takes. But at this point I just want to have a # working system so that I can continue the merge window work tomorrow. # # Cc: Takashi Iwai # Signed-off-by: Linus Torvalds # < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version # < git log --format=%s --max-count=1 4b820e167bf6f410ace479d8df5b15a574000e75 # < make -s -j 24 ARCH=powerpc O=/kisskb/build/linus_mpc83xx_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- mpc83xx_defconfig # < make -s -j 24 ARCH=powerpc O=/kisskb/build/linus_mpc83xx_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- help # make -s -j 24 ARCH=powerpc O=/kisskb/build/linus_mpc83xx_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- olddefconfig # make -s -j 24 ARCH=powerpc O=/kisskb/build/linus_mpc83xx_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- /kisskb/src/net/sched/sch_frag.c: In function 'sch_fragment': /kisskb/src/net/sched/sch_frag.c:93:10: warning: missing braces around initializer [-Wmissing-braces] struct rtable sch_frag_rt = { 0 }; ^ /kisskb/src/net/sched/sch_frag.c:93:10: warning: (near initialization for 'sch_frag_rt.dst') [-Wmissing-braces] /kisskb/src/block/genhd.c: In function 'diskstats_show': /kisskb/src/block/genhd.c:1182:1: warning: the frame size of 1120 bytes is larger than 1024 bytes [-Wframe-larger-than=] } ^ INFO: Uncompressed kernel (size 0x820e14) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x900000) INFO: Uncompressed kernel (size 0x820e14) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x900000) INFO: Uncompressed kernel (size 0x820e14) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x900000) INFO: Uncompressed kernel (size 0x820e14) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x900000) INFO: Uncompressed kernel (size 0x820e14) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x900000) INFO: Uncompressed kernel (size 0x820e14) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x900000) INFO: Uncompressed kernel (size 0x810804) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x900000) INFO: Uncompressed kernel (size 0x820e14) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x900000) Image Name: Linux-5.13.0-g4b820e167bf6 Created: Sat Jul 3 16:23:18 2021 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3671246 Bytes = 3585.20 KiB = 3.50 MiB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-5.13.0-g4b820e167bf6 Created: Sat Jul 3 16:23:18 2021 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3701045 Bytes = 3614.30 KiB = 3.53 MiB Load Address: 00900000 Entry Point: 00900294 Image Name: Linux-5.13.0-g4b820e167bf6 Created: Sat Jul 3 16:23:18 2021 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3701393 Bytes = 3614.64 KiB = 3.53 MiB Load Address: 00900000 Entry Point: 00900294 Image Name: Linux-5.13.0-g4b820e167bf6 Created: Sat Jul 3 16:23:18 2021 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3702041 Bytes = 3615.27 KiB = 3.53 MiB Load Address: 00900000 Entry Point: 00900294 Image Name: Linux-5.13.0-g4b820e167bf6 Created: Sat Jul 3 16:23:18 2021 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3701390 Bytes = 3614.64 KiB = 3.53 MiB Load Address: 00900000 Entry Point: 00900294 Image Name: Linux-5.13.0-g4b820e167bf6 Created: Sat Jul 3 16:23:18 2021 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3701369 Bytes = 3614.62 KiB = 3.53 MiB Load Address: 00900000 Entry Point: 00900294 Image Name: Linux-5.13.0-g4b820e167bf6 Created: Sat Jul 3 16:23:18 2021 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3701271 Bytes = 3614.52 KiB = 3.53 MiB Load Address: 00900000 Entry Point: 00900294 Completed OK # rm -rf /kisskb/build/linus_mpc83xx_defconfig_powerpc-gcc4.9 # Build took: 0:01:09.384274