# 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 <ming.lei@redhat.com>
# 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 <williams@redhat.com>
#     Fixes: ab53dcfb3e7b ("sbitmap: Protect swap_lock from hardirq")
#     Cc: Jens Axboe <axboe@kernel.dk>
#     Cc: Ming Lei <ming.lei@redhat.com>
#     Cc: Guenter Roeck <linux@roeck-us.net>
#     Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
#     Signed-off-by: Ming Lei <ming.lei@redhat.com>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/mips-linux/bin/mips-linux-gcc --version
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/mips-linux/bin/mips-linux-ld --version
# < git log --format=%s --max-count=1 fe76fc6aaf538df27708ffa3e5d549a6c8e16142
# < make -s -j 24 ARCH=mips O=/kisskb/build/linus_malta_defconfig_mips CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/mips-linux/bin/mips-linux-  malta_defconfig
# make -s -j 24 ARCH=mips O=/kisskb/build/linus_malta_defconfig_mips CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/mips-linux/bin/mips-linux-  
/kisskb/src/arch/mips/vdso/Makefile:38: MIPS VDSO requires binutils >= 2.25
/kisskb/src/arch/mips/vdso/Makefile:38: MIPS VDSO requires binutils >= 2.25
/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/kernel/rcu/srcutree.c: In function 'init_srcu_struct_fields':
/kisskb/src/kernel/rcu/srcutree.c:152:32: warning: 'levelspread[<Ueaa0>]' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/rcu/srcutree.c:100:6: note: 'levelspread[<Ueaa0>]' was declared here
/kisskb/src/drivers/base/regmap/regmap.c: In function 'regmap_raw_read':
/kisskb/src/drivers/base/regmap/regmap.c:2594:6: 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:1855:6: 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/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/net/bridge/br_netlink.c: In function 'br_afspec.isra.21':
/kisskb/src/net/bridge/br_netlink.c:652:7: warning: 'err' 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:1843:30: warning: 'copylen' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/net/tun.c:1753:46: 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:1522:3: warning: 'pwr_level_cisco' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/net/mac80211/mlme.c:1479:6: note: 'pwr_level_cisco' 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
Completed OK
# rm -rf /kisskb/build/linus_malta_defconfig_mips
# Build took: 0:01:37.994374