# git rev-parse -q --verify 3bb61aa61828499a7d0f5e560051625fd02ae7e4^{commit} 3bb61aa61828499a7d0f5e560051625fd02ae7e4 already have revision, skipping fetch # git checkout -q -f -B kisskb 3bb61aa61828499a7d0f5e560051625fd02ae7e4 # git clean -qxdf # < git log -1 # commit 3bb61aa61828499a7d0f5e560051625fd02ae7e4 # Merge: 2c6ffa9e9b11 9e5344e0ffc3 # Author: Linus Torvalds # Date: Wed Dec 2 12:27:37 2020 -0800 # # Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux # # Pull arm64 fixes from Will Deacon: # "I'm sad to say that we've got an unusually large arm64 fixes pull for # rc7 which addresses numerous significant instrumentation issues with # our entry code. # # Without these patches, lockdep is hopelessly unreliable in some # configurations [1,2] and syzkaller is therefore not a lot of use # because it's so noisy. # # Although much of this has always been broken, it appears to have been # exposed more readily by other changes such as 044d0d6de9f5 ("lockdep: # Only trace IRQ edges") and general lockdep improvements around IRQ # tracing and NMIs. # # Fixing this properly required moving much of the instrumentation hooks # from our entry assembly into C, which Mark has been working on for the # last few weeks. We're not quite ready to move to the recently added # generic functions yet, but the code here has been deliberately written # to mimic that closely so we can look at cleaning things up once we # have a bit more breathing room. # # Having said all that, the second version of these patches was posted # last week and I pushed it into our CI (kernelci and cki) along with a # commit which forced on PROVE_LOCKING, NOHZ_FULL and # CONTEXT_TRACKING_FORCE. The result? We found a real bug in the # md/raid10 code [3]. # # Oh, and there's also a really silly typo patch that's unrelated. # # Summary: # # - Fix numerous issues with instrumentation and exception entry # # - Fix hideous typo in unused register field definition" # # [1] https://lore.kernel.org/r/CACT4Y+aAzoJ48Mh1wNYD17pJqyEcDnrxGfApir=-j171TnQXhw@mail.gmail.com # [2] https://lore.kernel.org/r/20201119193819.GA2601289@elver.google.com # [3] https://lore.kernel.org/r/94c76d5e-466a-bc5f-e6c2-a11b65c39f83@redhat.com # # * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: # arm64: mte: Fix typo in macro definition # arm64: entry: fix EL1 debug transitions # arm64: entry: fix NMI {user, kernel}->kernel transitions # arm64: entry: fix non-NMI kernel<->kernel transitions # arm64: ptrace: prepare for EL1 irq/rcu tracking # arm64: entry: fix non-NMI user<->kernel transitions # arm64: entry: move el1 irq/nmi logic to C # arm64: entry: prepare ret_to_user for function call # arm64: entry: move enter_from_user_mode to entry-common.c # arm64: entry: mark entry code as noinstr # arm64: mark idle code as noinstr # arm64: syscall: exit userspace before unmasking exceptions # < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux-ld --version # < git log --format=%s --max-count=1 3bb61aa61828499a7d0f5e560051625fd02ae7e4 # < make -s -j 48 ARCH=ia64 O=/kisskb/build/linus_ia64-defconfig_ia64-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux- defconfig arch/ia64/configs/generic_defconfig:58:warning: override: reassigning to symbol ATA arch/ia64/configs/generic_defconfig:59:warning: override: reassigning to symbol ATA_PIIX # < make -s -j 48 ARCH=ia64 O=/kisskb/build/linus_ia64-defconfig_ia64-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux- help # make -s -j 48 ARCH=ia64 O=/kisskb/build/linus_ia64-defconfig_ia64-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux- olddefconfig # make -s -j 48 ARCH=ia64 O=/kisskb/build/linus_ia64-defconfig_ia64-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux- :1511:2: warning: #warning syscall clone3 not implemented [-Wcpp] In file included from /kisskb/src/arch/ia64/include/uapi/asm/intrinsics.h:22:0, from /kisskb/src/arch/ia64/include/asm/intrinsics.h:11, from /kisskb/src/arch/ia64/include/asm/timex.h:14, from /kisskb/src/include/linux/timex.h:65, from /kisskb/src/include/linux/time32.h:13, from /kisskb/src/include/linux/time.h:73, from /kisskb/src/fs/nfs/read.c:11: /kisskb/src/fs/nfs/read.c: In function 'nfs_read_completion': /kisskb/src/arch/ia64/include/uapi/asm/cmpxchg.h:57:2: warning: value computed is not used [-Wunused-value] ((__typeof__(*(ptr))) __xchg((unsigned long) (x), (ptr), sizeof(*(ptr)))) ^ /kisskb/src/fs/nfs/read.c:196:5: note: in expansion of macro 'xchg' xchg(&nfs_req_openctx(req)->error, error); ^ /kisskb/src/fs/nfs/read.c: In function 'nfs_readpage': /kisskb/src/arch/ia64/include/uapi/asm/cmpxchg.h:57:2: warning: value computed is not used [-Wunused-value] ((__typeof__(*(ptr))) __xchg((unsigned long) (x), (ptr), sizeof(*(ptr)))) ^ /kisskb/src/fs/nfs/read.c:355:2: note: in expansion of macro 'xchg' xchg(&ctx->error, 0); ^ No errors detected in 22334 functions. Completed OK # rm -rf /kisskb/build/linus_ia64-defconfig_ia64-gcc4.9 # Build took: 0:02:17.960240