# git rev-parse -q --verify fe76fc6aaf538df27708ffa3e5d549a6c8e16142^{commit} fe76fc6aaf538df27708ffa3e5d549a6c8e16142 already have revision, skipping fetch # git checkout -q -f -B kisskb fe76fc6aaf538df27708ffa3e5d549a6c8e16142 # git clean -qxdf # < git log -1 # commit fe76fc6aaf538df27708ffa3e5d549a6c8e16142 # Author: Ming Lei # Date: Tue Jan 15 11:59:52 2019 +0800 # # sbitmap: Protect swap_lock from hardirq # # Because we may call blk_mq_get_driver_tag() directly from # blk_mq_dispatch_rq_list() without holding any lock, then HARDIRQ may # come and the above DEADLOCK is triggered. # # Commit ab53dcfb3e7b ("sbitmap: Protect swap_lock from hardirq") tries to # fix this issue by using 'spin_lock_bh', which isn't enough because we # complete request from hardirq context direclty in case of multiqueue. # # Cc: Clark Williams # Fixes: ab53dcfb3e7b ("sbitmap: Protect swap_lock from hardirq") # Cc: Jens Axboe # Cc: Ming Lei # Cc: Guenter Roeck # Cc: Steven Rostedt (VMware) # Signed-off-by: Ming Lei # Signed-off-by: Linus Torvalds # < /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 fe76fc6aaf538df27708ffa3e5d549a6c8e16142 # < make -s -j 10 ARCH=powerpc O=/kisskb/build/linus_ppc40x_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- ppc40x_defconfig # make -s -j 10 ARCH=powerpc O=/kisskb/build/linus_ppc40x_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:186:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/i2c/i2c-core-base.c: In function 'i2c_generic_scl_recovery': /kisskb/src/drivers/i2c/i2c-core-base.c:235:5: warning: 'ret' 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: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/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 INFO: Uncompressed kernel (size 0x5415a0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x5415a0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x5415a0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x5415a0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x530f2c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) Image Name: Linux-5.0.0-rc2-gfe76fc6aaf53 Created: Tue Jan 15 17:46:48 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2671756 Bytes = 2609.14 KiB = 2.55 MiB Load Address: 00600000 Entry Point: 006019cc Image Name: Linux-5.0.0-rc2-gfe76fc6aaf53 Created: Tue Jan 15 17:46:48 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2639760 Bytes = 2577.89 KiB = 2.52 MiB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-5.0.0-rc2-gfe76fc6aaf53 Created: Tue Jan 15 17:46:48 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2671415 Bytes = 2608.80 KiB = 2.55 MiB Load Address: 00600000 Entry Point: 00601758 Completed OK # rm -rf /kisskb/build/linus_ppc40x_defconfig_powerpc-gcc4.6 # Build took: 0:00:48.003497