# git rev-parse -q --verify 4b78317679c4f3782a3cff0ddb269c1fcfde7621^{commit}
4b78317679c4f3782a3cff0ddb269c1fcfde7621
already have revision, skipping fetch
# git checkout -q -f -B kisskb 4b78317679c4f3782a3cff0ddb269c1fcfde7621
# git clean -qxdf
# < git log -1
# commit 4b78317679c4f3782a3cff0ddb269c1fcfde7621
# Merge: 880584176ed7 55a974021ec9
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sat Dec 1 12:35:48 2018 -0800
# 
#     Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
#     
#     Pull STIBP fallout fixes from Thomas Gleixner:
#      "The performance destruction department finally got it's act together
#       and came up with a cure for the STIPB regression:
#     
#        - Provide a command line option to control the spectre v2 user space
#          mitigations. Default is either seccomp or prctl (if seccomp is
#          disabled in Kconfig). prctl allows mitigation opt-in, seccomp
#          enables the migitation for sandboxed processes.
#     
#        - Rework the code to handle the conditional STIBP/IBPB control and
#          remove the now unused ptrace_may_access_sched() optimization
#          attempt
#     
#        - Disable STIBP automatically when SMT is disabled
#     
#        - Optimize the switch_to() logic to avoid MSR writes and invocations
#          of __switch_to_xtra().
#     
#        - Make the asynchronous speculation TIF updates synchronous to
#          prevent stale mitigation state.
#     
#       As a general cleanup this also makes retpoline directly depend on
#       compiler support and removes the 'minimal retpoline' option which just
#       pretended to provide some form of security while providing none"
#     
#     * 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (31 commits)
#       x86/speculation: Provide IBPB always command line options
#       x86/speculation: Add seccomp Spectre v2 user space protection mode
#       x86/speculation: Enable prctl mode for spectre_v2_user
#       x86/speculation: Add prctl() control for indirect branch speculation
#       x86/speculation: Prepare arch_smt_update() for PRCTL mode
#       x86/speculation: Prevent stale SPEC_CTRL msr content
#       x86/speculation: Split out TIF update
#       ptrace: Remove unused ptrace_may_access_sched() and MODE_IBRS
#       x86/speculation: Prepare for conditional IBPB in switch_mm()
#       x86/speculation: Avoid __switch_to_xtra() calls
#       x86/process: Consolidate and simplify switch_to_xtra() code
#       x86/speculation: Prepare for per task indirect branch speculation control
#       x86/speculation: Add command line control for indirect branch speculation
#       x86/speculation: Unify conditional spectre v2 print functions
#       x86/speculataion: Mark command line parser data __initdata
#       x86/speculation: Mark string arrays const correctly
#       x86/speculation: Reorder the spec_v2 code
#       x86/l1tf: Show actual SMT state
#       x86/speculation: Rework SMT state change
#       sched/smt: Expose sched_smt_present static key
#       ...
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version
# < git log --format=%s --max-count=1 4b78317679c4f3782a3cff0ddb269c1fcfde7621
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/linus_ps3_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  ps3_defconfig
# make -s -j 48 ARCH=powerpc O=/kisskb/build/linus_ps3_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  
/kisskb/src/kernel/rcu/srcutree.c: In function 'init_srcu_struct_fields':
/kisskb/src/kernel/rcu/srcutree.c:152:32: warning: 'levelspread[<U5820>]' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/rcu/srcutree.c:100:6: note: 'levelspread[<U5820>]' was declared here
/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/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/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:341:21: note: 'pdeo' was declared here
/kisskb/src/net/bluetooth/hidp/core.c: In function 'hidp_connection_add':
/kisskb/src/net/bluetooth/hidp/core.c:1381:18: warning: 'session' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/lib/mpi/mpicoder.c: In function 'mpi_read_raw_from_sgl':
/kisskb/src/lib/mpi/mpicoder.c:352:8: warning: 'buff' 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/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/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/dev.c: In function 'validate_xmit_skb_list':
/kisskb/src/net/core/dev.c:3379:15: warning: 'tail' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/net/mac80211/tx.c: In function 'ieee80211_build_hdr':
/kisskb/src/net/mac80211/tx.c:2502:27: warning: 'chanctx_conf' 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:1513:3: warning: 'pwr_level_cisco' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/net/mac80211/mlme.c:1470:6: note: 'pwr_level_cisco' was declared here
Completed OK
# rm -rf /kisskb/build/linus_ps3_defconfig_powerpc
# Build took: 0:01:22.601293