# git rev-parse -q --verify 3719876809e745b9db5293d418600c194bbf5c23^{commit} 3719876809e745b9db5293d418600c194bbf5c23 already have revision, skipping fetch # git checkout -q -f -B kisskb 3719876809e745b9db5293d418600c194bbf5c23 # git clean -qxdf # < git log -1 # commit 3719876809e745b9db5293d418600c194bbf5c23 # Author: Steven Rostedt (VMware) # Date: Mon Jan 14 12:25:40 2019 -0500 # # sbitmap: Protect swap_lock from softirqs # # The swap_lock used by sbitmap has a chain with locks taken from softirq, # but the swap_lock is not protected from being preempted by softirqs. # # A chain exists of: # # sbq->ws[i].wait -> dispatch_wait_lock -> swap_lock # # Where the sbq->ws[i].wait lock can be taken from softirq context, which # means all locks below it in the chain must also be protected from # softirqs. # # Reported-by: Clark Williams # Fixes: 58ab5e32e6fd ("sbitmap: silence bogus lockdep IRQ warning") # Fixes: ea86ea2cdced ("sbitmap: amortize cost of clearing bits") # Cc: Jens Axboe # Cc: Ming Lei # Cc: Guenter Roeck # Signed-off-by: Steven Rostedt (VMware) # Signed-off-by: Linus Torvalds # < /opt/cross/kisskb/gcc-4.6.3-nolibc/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi-gcc --version # < /opt/cross/kisskb/gcc-4.6.3-nolibc/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi-ld --version # < git log --format=%s --max-count=1 3719876809e745b9db5293d418600c194bbf5c23 # < make -s -j 8 ARCH=arm O=/kisskb/build/linus_bcm2835_defconfig_arm CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi- bcm2835_defconfig # make -s -j 8 ARCH=arm O=/kisskb/build/linus_bcm2835_defconfig_arm CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi- /kisskb/src/arch/arm/kernel/patch.c: In function '__patch_text_real': /kisskb/src/arch/arm/include/asm/irqflags.h:171:2: warning: 'flags' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/arch/arm/kernel/patch.c:61:16: note: 'flags' was declared here /kisskb/src/ipc/shm.c: In function 'ksys_shmdt': /kisskb/src/ipc/shm.c:1686:59: warning: 'file' 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:186:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/mm/ksm.c: In function '__stable_node_chain': /kisskb/src/mm/ksm.c:1393:15: warning: 'found_rmap_hlist_len' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/mm/ksm.c:1365:6: note: 'found_rmap_hlist_len' was declared here /kisskb/src/lib/mpi/mpicoder.c: In function 'mpi_read_raw_from_sgl': /kisskb/src/lib/mpi/mpicoder.c:336:12: warning: 'buff' 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/lib/rhashtable.c: In function 'rht_deferred_worker': /kisskb/src/lib/rhashtable.c:264:2: warning: 'next' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/lib/rhashtable.c:229:28: note: 'next' was declared here /kisskb/src/net/core/gen_stats.c: In function '__gnet_stats_copy_basic': /kisskb/src/net/core/gen_stats.c:161:19: warning: 'seq' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/core/dev.c: In function 'validate_xmit_skb_list': /kisskb/src/net/core/dev.c:3405:15: warning: 'tail' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/ipv4/ip_output.c: In function '__ip_append_data': /kisskb/src/include/linux/skbuff.h:1338:6: warning: 'extra_uref' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/ipv4/ip_output.c:885:14: note: 'extra_uref' was declared here /kisskb/src/drivers/gpio/gpiolib-of.c: In function 'of_gpiochip_add': /kisskb/src/drivers/gpio/gpiolib-of.c:455:8: warning: 'dflags' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpio/gpiolib-of.c:441:19: note: 'dflags' was declared here /kisskb/src/drivers/gpio/gpiolib-of.c:455:8: warning: 'lflags' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpio/gpiolib-of.c:440:25: note: 'lflags' was declared here /kisskb/src/net/ipv6/ip6_output.c: In function '__ip6_append_data': /kisskb/src/include/linux/skbuff.h:1338:6: warning: 'extra_uref' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/ipv6/ip6_output.c:1270:14: note: 'extra_uref' was declared here /kisskb/src/drivers/gpu/drm/drm_dp_mst_topology.c: In function 'drm_dp_sideband_msg_build': /kisskb/src/drivers/gpu/drm/drm_dp_mst_topology.c:364:23: warning: 'hdrlen' 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/drivers/gpu/drm/drm_atomic.c: In function 'drm_atomic_check_only': /kisskb/src/drivers/gpu/drm/drm_atomic.c:420:38: warning: 'crtc_state' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/drm_atomic.c:399:25: note: 'crtc_state' was declared here /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 Completed OK # rm -rf /kisskb/build/linus_bcm2835_defconfig_arm # Build took: 0:01:52.679674