1. 25 Jul, 2017 4 commits
    • Josh Poimboeuf's avatar
      x86/asm: Make objtool unreachable macros independent from GCC version · 1ee6f00d
      Josh Poimboeuf authored
      The ASM_UNREACHABLE macro isn't GCC version-specific, so move it outside
      the GCC 4.5+ check.  Otherwise the 0-day robot will report objtool
      warnings for uses of ASM_UNREACHABLE with GCC 4.4.
      
      Also move the annotate_unreachable() macro so the related macros can
      stay together.
      Reported-by: default avatarkbuild test robot <fengguang.wu@intel.com>
      Signed-off-by: default avatarJosh Poimboeuf <jpoimboe@redhat.com>
      Cc: Kees Cook <keescook@chromium.org>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Fixes: aa5d1b81 ("x86/asm: Add ASM_UNREACHABLE")
      Link: http://lkml.kernel.org/r/fb18337dbf230fd36450d9faf19a2b2533dbcba1.1500993873.git.jpoimboe@redhat.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      1ee6f00d
    • Kees Cook's avatar
      x86/asm: Add ASM_UNREACHABLE · aa5d1b81
      Kees Cook authored
      This creates an unreachable annotation in asm for CONFIG_STACK_VALIDATION=y.
      While here, adjust earlier uses of \t\n into \n\t.
      Suggested-by: default avatarJosh Poimboeuf <jpoimboe@redhat.com>
      Signed-off-by: default avatarKees Cook <keescook@chromium.org>
      Cc: Alexey Dobriyan <adobriyan@gmail.com>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: Arnd Bergmann <arnd@arndb.de>
      Cc: Christoph Hellwig <hch@infradead.org>
      Cc: David S. Miller <davem@davemloft.net>
      Cc: Davidlohr Bueso <dave@stgolabs.net>
      Cc: Elena Reshetova <elena.reshetova@intel.com>
      Cc: Eric Biggers <ebiggers3@gmail.com>
      Cc: Eric W. Biederman <ebiederm@xmission.com>
      Cc: Greg KH <gregkh@linuxfoundation.org>
      Cc: Hans Liljestrand <ishkamiel@gmail.com>
      Cc: James Bottomley <James.Bottomley@hansenpartnership.com>
      Cc: Jann Horn <jannh@google.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Manfred Spraul <manfred@colorfullife.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Serge E. Hallyn <serge@hallyn.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: arozansk@redhat.com
      Cc: axboe@kernel.dk
      Cc: kernel-hardening@lists.openwall.com
      Cc: linux-arch <linux-arch@vger.kernel.org>
      Link: http://lkml.kernel.org/r/1500921349-10803-3-git-send-email-keescook@chromium.orgSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      aa5d1b81
    • Kees Cook's avatar
      x86/asm: Add suffix macro for GEN_*_RMWcc() · df340524
      Kees Cook authored
      The coming x86 refcount protection needs to be able to add trailing
      instructions to the GEN_*_RMWcc() operations. This extracts the
      difference between the goto/non-goto cases so the helper macros
      can be defined outside the #ifdef cases. Additionally adds argument
      naming to the resulting asm for referencing from suffixed
      instructions, and adds clobbers for "cc", and "cx" to let suffixes
      use _ASM_CX, and retain any set flags.
      Signed-off-by: default avatarKees Cook <keescook@chromium.org>
      Cc: Alexey Dobriyan <adobriyan@gmail.com>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: Arnd Bergmann <arnd@arndb.de>
      Cc: Christoph Hellwig <hch@infradead.org>
      Cc: David S. Miller <davem@davemloft.net>
      Cc: Davidlohr Bueso <dave@stgolabs.net>
      Cc: Elena Reshetova <elena.reshetova@intel.com>
      Cc: Eric Biggers <ebiggers3@gmail.com>
      Cc: Eric W. Biederman <ebiederm@xmission.com>
      Cc: Greg KH <gregkh@linuxfoundation.org>
      Cc: Hans Liljestrand <ishkamiel@gmail.com>
      Cc: James Bottomley <James.Bottomley@hansenpartnership.com>
      Cc: Jann Horn <jannh@google.com>
      Cc: Josh Poimboeuf <jpoimboe@redhat.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Manfred Spraul <manfred@colorfullife.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Serge E. Hallyn <serge@hallyn.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: arozansk@redhat.com
      Cc: axboe@kernel.dk
      Cc: kernel-hardening@lists.openwall.com
      Cc: linux-arch <linux-arch@vger.kernel.org>
      Link: http://lkml.kernel.org/r/1500921349-10803-2-git-send-email-keescook@chromium.orgSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      df340524
    • Josh Poimboeuf's avatar
      objtool: Fix gcov check for older versions of GCC · 867ac9d7
      Josh Poimboeuf authored
      Objtool tries to silence 'unreachable instruction' warnings when it
      detects gcov is enabled, because gcov produces a lot of unreachable
      instructions and they don't really matter.
      
      However, the 0-day bot is still reporting some unreachable instruction
      warnings with CONFIG_GCOV_KERNEL=y on GCC 4.6.4.
      
      As it turns out, objtool's gcov detection doesn't work with older
      versions of GCC because they don't create a bunch of symbols with the
      'gcov.' prefix like newer versions of GCC do.
      
      Move the gcov check out of objtool and instead just create a new
      '--no-unreachable' flag which can be passed in by the kernel Makefile
      when CONFIG_GCOV_KERNEL is defined.
      
      Also rename the 'nofp' variable to 'no_fp' for consistency with the new
      'no_unreachable' variable.
      Reported-by: default avatarkbuild test robot <fengguang.wu@intel.com>
      Signed-off-by: default avatarJosh Poimboeuf <jpoimboe@redhat.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Fixes: 9cfffb11 ("objtool: Skip all "unreachable instruction" warnings for gcov kernels")
      Link: http://lkml.kernel.org/r/c243dc78eb2ffdabb6e927844dea39b6033cd395.1500939244.git.jpoimboe@redhat.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      867ac9d7
  2. 24 Jul, 2017 5 commits
  3. 18 Jul, 2017 8 commits
  4. 17 Jul, 2017 7 commits
  5. 16 Jul, 2017 3 commits
  6. 15 Jul, 2017 13 commits
    • Linus Torvalds's avatar
      Linux v4.13-rc1 · 5771a8c0
      Linus Torvalds authored
      5771a8c0
    • Linus Torvalds's avatar
      Merge tag 'standardize-docs' of git://git.lwn.net/linux · 486088bc
      Linus Torvalds authored
      Pull documentation format standardization from Jonathan Corbet:
       "This series converts a number of top-level documents to the RST format
        without incorporating them into the Sphinx tree. The hope is to bring
        some uniformity to kernel documentation and, perhaps more importantly,
        have our existing docs serve as an example of the desired formatting
        for those that will be added later.
      
        Mauro has gone through and fixed up a lot of top-level documentation
        files to make them conform to the RST format, but without moving or
        renaming them in any way. This will help when we incorporate the ones
        we want to keep into the Sphinx doctree, but the real purpose is to
        bring a bit of uniformity to our documentation and let the top-level
        docs serve as examples for those writing new ones"
      
      * tag 'standardize-docs' of git://git.lwn.net/linux: (84 commits)
        docs: kprobes.txt: Fix whitespacing
        tee.txt: standardize document format
        cgroup-v2.txt: standardize document format
        dell_rbu.txt: standardize document format
        zorro.txt: standardize document format
        xz.txt: standardize document format
        xillybus.txt: standardize document format
        vfio.txt: standardize document format
        vfio-mediated-device.txt: standardize document format
        unaligned-memory-access.txt: standardize document format
        this_cpu_ops.txt: standardize document format
        svga.txt: standardize document format
        static-keys.txt: standardize document format
        smsc_ece1099.txt: standardize document format
        SM501.txt: standardize document format
        siphash.txt: standardize document format
        sgi-ioc4.txt: standardize document format
        SAK.txt: standardize document format
        rpmsg.txt: standardize document format
        robust-futexes.txt: standardize document format
        ...
      486088bc
    • Linus Torvalds's avatar
      Merge tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random · 52f6c588
      Linus Torvalds authored
      Pull random updates from Ted Ts'o:
       "Add wait_for_random_bytes() and get_random_*_wait() functions so that
        callers can more safely get random bytes if they can block until the
        CRNG is initialized.
      
        Also print a warning if get_random_*() is called before the CRNG is
        initialized. By default, only one single-line warning will be printed
        per boot. If CONFIG_WARN_ALL_UNSEEDED_RANDOM is defined, then a
        warning will be printed for each function which tries to get random
        bytes before the CRNG is initialized. This can get spammy for certain
        architecture types, so it is not enabled by default"
      
      * tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random:
        random: reorder READ_ONCE() in get_random_uXX
        random: suppress spammy warnings about unseeded randomness
        random: warn when kernel uses unseeded randomness
        net/route: use get_random_int for random counter
        net/neighbor: use get_random_u32 for 32-bit hash random
        rhashtable: use get_random_u32 for hash_rnd
        ceph: ensure RNG is seeded before using
        iscsi: ensure RNG is seeded before use
        cifs: use get_random_u32 for 32-bit lock random
        random: add get_random_{bytes,u32,u64,int,long,once}_wait family
        random: add wait_for_random_bytes() API
      52f6c588
    • Linus Torvalds's avatar
      Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 78dcf734
      Linus Torvalds authored
      Pull ->s_options removal from Al Viro:
       "Preparations for fsmount/fsopen stuff (coming next cycle). Everything
        gets moved to explicit ->show_options(), killing ->s_options off +
        some cosmetic bits around fs/namespace.c and friends. Basically, the
        stuff needed to work with fsmount series with minimum of conflicts
        with other work.
      
        It's not strictly required for this merge window, but it would reduce
        the PITA during the coming cycle, so it would be nice to have those
        bits and pieces out of the way"
      
      * 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        isofs: Fix isofs_show_options()
        VFS: Kill off s_options and helpers
        orangefs: Implement show_options
        9p: Implement show_options
        isofs: Implement show_options
        afs: Implement show_options
        affs: Implement show_options
        befs: Implement show_options
        spufs: Implement show_options
        bpf: Implement show_options
        ramfs: Implement show_options
        pstore: Implement show_options
        omfs: Implement show_options
        hugetlbfs: Implement show_options
        VFS: Don't use save/replace_mount_options if not using generic_show_options
        VFS: Provide empty name qstr
        VFS: Make get_filesystem() return the affected filesystem
        VFS: Clean up whitespace in fs/namespace.c and fs/super.c
        Provide a function to create a NUL-terminated string from unterminated data
      78dcf734
    • Linus Torvalds's avatar
      Merge branch 'work.__copy_to_user' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 93ff8185
      Linus Torvalds authored
      Pull more __copy_.._user elimination from Al Viro.
      
      * 'work.__copy_to_user' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        drm_dp_aux_dev: switch to read_iter/write_iter
      93ff8185
    • Linus Torvalds's avatar
      Merge branch 'work.uaccess-unaligned' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 89cbec71
      Linus Torvalds authored
      Pull uacess-unaligned removal from Al Viro:
       "That stuff had just one user, and an exotic one, at that - binfmt_flat
        on arm and m68k"
      
      * 'work.uaccess-unaligned' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        kill {__,}{get,put}_user_unaligned()
        binfmt_flat: flat_{get,put}_addr_from_rp() should be able to fail
      89cbec71
    • Linus Torvalds's avatar
      Merge branch 'misc.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 2173bd06
      Linus Torvalds authored
      Pull network field-by-field copy-in updates from Al Viro:
       "This part of the misc compat queue was held back for review from
        networking folks and since davem has jus ACKed those..."
      
      * 'misc.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        get_compat_bpf_fprog(): don't copyin field-by-field
        get_compat_msghdr(): get rid of field-by-field copyin
        copy_msghdr_from_user(): get rid of field-by-field copyin
      2173bd06
    • Linus Torvalds's avatar
      Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus · 568d135d
      Linus Torvalds authored
      Pull MIPS updates from Ralf Baechle:
       "Boston platform support:
         - Document DT bindings
         - Add CLK driver for board clocks
      
        CM:
         - Avoid per-core locking with CM3 & higher
         - WARN on attempt to lock invalid VP, not BUG
      
        CPS:
         - Select CONFIG_SYS_SUPPORTS_SCHED_SMT for MIPSr6
         - Prevent multi-core with dcache aliasing
         - Handle cores not powering down more gracefully
         - Handle spurious VP starts more gracefully
      
        DSP:
         - Add lwx & lhx missaligned access support
      
        eBPF:
         - Add MIPS support along with many supporting change to add the
           required infrastructure
      
        Generic arch code:
         - Misc sysmips MIPS_ATOMIC_SET fixes
         - Drop duplicate HAVE_SYSCALL_TRACEPOINTS
         - Negate error syscall return in trace
         - Correct forced syscall errors
         - Traced negative syscalls should return -ENOSYS
         - Allow samples/bpf/tracex5 to access syscall arguments for sane
           traces
         - Cleanup from old Kconfig options in defconfigs
         - Fix PREF instruction usage by memcpy for MIPS R6
         - Fix various special cases in the FPU eulation
         - Fix some special cases in MIPS16e2 support
         - Fix MIPS I ISA /proc/cpuinfo reporting
         - Sort MIPS Kconfig alphabetically
         - Fix minimum alignment requirement of IRQ stack as required by
           ABI / GCC
         - Fix special cases in the module loader
         - Perform post-DMA cache flushes on systems with MAARs
         - Probe the I6500 CPU
         - Cleanup cmpxchg and add support for 1 and 2 byte operations
         - Use queued read/write locks (qrwlock)
         - Use queued spinlocks (qspinlock)
         - Add CPU shared FTLB feature detection
         - Handle tlbex-tlbp race condition
         - Allow storing pgd in C0_CONTEXT for MIPSr6
         - Use current_cpu_type() in m4kc_tlbp_war()
         - Support Boston in the generic kernel
      
        Generic platform:
         - yamon-dt: Pull YAMON DT shim code out of SEAD-3 board
         - yamon-dt: Support > 256MB of RAM
         - yamon-dt: Use serial* rather than uart* aliases
         - Abstract FDT fixup application
         - Set RTC_ALWAYS_BCD to 0
         - Add a MAINTAINERS entry
      
        core kernel:
         - qspinlock.c: include linux/prefetch.h
      
        Loongson 3:
         - Add support
      
        Perf:
         - Add I6500 support
      
        SEAD-3:
         - Remove GIC timer from DT
         - Set interrupt-parent per-device, not at root node
         - Fix GIC interrupt specifiers
      
        SMP:
         - Skip IPI setup if we only have a single CPU
      
        VDSO:
         - Make comment match reality
         - Improvements to time code in VDSO"
      
      * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (86 commits)
        locking/qspinlock: Include linux/prefetch.h
        MIPS: Fix MIPS I ISA /proc/cpuinfo reporting
        MIPS: Fix minimum alignment requirement of IRQ stack
        MIPS: generic: Support MIPS Boston development boards
        MIPS: DTS: img: Don't attempt to build-in all .dtb files
        clk: boston: Add a driver for MIPS Boston board clocks
        dt-bindings: Document img,boston-clock binding
        MIPS: Traced negative syscalls should return -ENOSYS
        MIPS: Correct forced syscall errors
        MIPS: Negate error syscall return in trace
        MIPS: Drop duplicate HAVE_SYSCALL_TRACEPOINTS select
        MIPS16e2: Provide feature overrides for non-MIPS16 systems
        MIPS: MIPS16e2: Report ASE presence in /proc/cpuinfo
        MIPS: MIPS16e2: Subdecode extended LWSP/SWSP instructions
        MIPS: MIPS16e2: Identify ASE presence
        MIPS: VDSO: Fix a mismatch between comment and preprocessor constant
        MIPS: VDSO: Add implementation of gettimeofday() fallback
        MIPS: VDSO: Add implementation of clock_gettime() fallback
        MIPS: VDSO: Fix conversions in do_monotonic()/do_monotonic_coarse()
        MIPS: Use current_cpu_type() in m4kc_tlbp_war()
        ...
      568d135d
    • Linus Torvalds's avatar
      Merge branch 'for-linus-4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml · 4ecd4ff5
      Linus Torvalds authored
      Pull UML updates from Richard Weinberger:
       "Mostly fixes for UML:
      
         - First round of fixes for PTRACE_GETRESET/SETREGSET
      
         - A printf vs printk cleanup
      
         - Minor improvements"
      
      * 'for-linus-4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
        um: Correctly check for PTRACE_GETRESET/SETREGSET
        um: v2: Use generic NOTES macro
        um: Add kerneldoc for userspace_tramp() and start_userspace()
        um: Add kerneldoc for segv_handler
        um: stub-data.h: remove superfluous include
        um: userspace - be more verbose in ptrace set regs error
        um: add dummy ioremap and iounmap functions
        um: Allow building and running on older hosts
        um: Avoid longjmp/setjmp symbol clashes with libpthread.a
        um: console: Ignore console= option
        um: Use os_warn to print out pre-boot warning/error messages
        um: Add os_warn() for pre-boot warning/error messages
        um: Use os_info for the messages on normal path
        um: Add os_info() for pre-boot information messages
        um: Use printk instead of printf in make_uml_dir
      4ecd4ff5
    • Linus Torvalds's avatar
      Merge tag 'upstream-4.13-rc1' of git://git.infradead.org/linux-ubifs · 966859b9
      Linus Torvalds authored
      Pull UBIFS updates from Richard Weinberger:
      
       - Updates and fixes for the file encryption mode
      
       - Minor improvements
      
       - Random fixes
      
      * tag 'upstream-4.13-rc1' of git://git.infradead.org/linux-ubifs:
        ubifs: Set double hash cookie also for RENAME_EXCHANGE
        ubifs: Massage assert in ubifs_xattr_set() wrt. init_xattrs
        ubifs: Don't leak kernel memory to the MTD
        ubifs: Change gfp flags in page allocation for bulk read
        ubifs: Fix oops when remounting with no_bulk_read.
        ubifs: Fail commit if TNC is obviously inconsistent
        ubifs: allow userspace to map mounts to volumes
        ubifs: Wire-up statx() support
        ubifs: Remove dead code from ubifs_get_link()
        ubifs: Massage debug prints wrt. fscrypt
        ubifs: Add assert to dent_key_init()
        ubifs: Fix unlink code wrt. double hash lookups
        ubifs: Fix data node size for truncating uncompressed nodes
        ubifs: Don't encrypt special files on creation
        ubifs: Fix memory leak in RENAME_WHITEOUT error path in do_rename
        ubifs: Fix inode data budget in ubifs_mknod
        ubifs: Correctly evict xattr inodes
        ubifs: Unexport ubifs_inode_slab
        ubifs: don't bother checking for encryption key in ->mmap()
        ubifs: require key for truncate(2) of encrypted file
      966859b9
    • Linus Torvalds's avatar
      Merge tag 'kvm-4.13-2' of git://git.kernel.org/pub/scm/virt/kvm/kvm · e37a07e0
      Linus Torvalds authored
      Pull more KVM updates from Radim Krčmář:
       "Second batch of KVM updates for v4.13
      
        Common:
         - add uevents for VM creation/destruction
         - annotate and properly access RCU-protected objects
      
        s390:
         - rename IOCTL added in the first v4.13 merge
      
        x86:
         - emulate VMLOAD VMSAVE feature in SVM
         - support paravirtual asynchronous page fault while nested
         - add Hyper-V userspace interfaces for better migration
         - improve master clock corner cases
         - extend internal error reporting after EPT misconfig
         - correct single-stepping of emulated instructions in SVM
         - handle MCE during VM entry
         - fix nVMX VM entry checks and nVMX VMCS shadowing"
      
      * tag 'kvm-4.13-2' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (28 commits)
        kvm: x86: hyperv: make VP_INDEX managed by userspace
        KVM: async_pf: Let guest support delivery of async_pf from guest mode
        KVM: async_pf: Force a nested vmexit if the injected #PF is async_pf
        KVM: async_pf: Add L1 guest async_pf #PF vmexit handler
        KVM: x86: Simplify kvm_x86_ops->queue_exception parameter list
        kvm: x86: hyperv: add KVM_CAP_HYPERV_SYNIC2
        KVM: x86: make backwards_tsc_observed a per-VM variable
        KVM: trigger uevents when creating or destroying a VM
        KVM: SVM: Enable Virtual VMLOAD VMSAVE feature
        KVM: SVM: Add Virtual VMLOAD VMSAVE feature definition
        KVM: SVM: Rename lbr_ctl field in the vmcb control area
        KVM: SVM: Prepare for new bit definition in lbr_ctl
        KVM: SVM: handle singlestep exception when skipping emulated instructions
        KVM: x86: take slots_lock in kvm_free_pit
        KVM: s390: Fix KVM_S390_GET_CMMA_BITS ioctl definition
        kvm: vmx: Properly handle machine check during VM-entry
        KVM: x86: update master clock before computing kvmclock_offset
        kvm: nVMX: Shadow "high" parts of shadowed 64-bit VMCS fields
        kvm: nVMX: Fix nested_vmx_check_msr_bitmap_controls
        kvm: nVMX: Validate the I/O bitmaps on nested VM-entry
        ...
      e37a07e0
    • Sebastian Andrzej Siewior's avatar
      random: reorder READ_ONCE() in get_random_uXX · 72e5c740
      Sebastian Andrzej Siewior authored
      Avoid the READ_ONCE in commit 4a072c71 ("random: silence compiler
      warnings and fix race") if we can leave the function after
      arch_get_random_XXX().
      
      Cc: Jason A. Donenfeld <Jason@zx2c4.com>
      Signed-off-by: default avatarSebastian Andrzej Siewior <bigeasy@linutronix.de>
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      72e5c740
    • Theodore Ts'o's avatar
      random: suppress spammy warnings about unseeded randomness · eecabf56
      Theodore Ts'o authored
      Unfortunately, on some models of some architectures getting a fully
      seeded CRNG is extremely difficult, and so this can result in dmesg
      getting spammed for a surprisingly long time.  This is really bad from
      a security perspective, and so architecture maintainers really need to
      do what they can to get the CRNG seeded sooner after the system is
      booted.  However, users can't do anything actionble to address this,
      and spamming the kernel messages log will only just annoy people.
      
      For developers who want to work on improving this situation,
      CONFIG_WARN_UNSEEDED_RANDOM has been renamed to
      CONFIG_WARN_ALL_UNSEEDED_RANDOM.  By default the kernel will always
      print the first use of unseeded randomness.  This way, hopefully the
      security obsessed will be happy that there is _some_ indication when
      the kernel boots there may be a potential issue with that architecture
      or subarchitecture.  To see all uses of unseeded randomness,
      developers can enable CONFIG_WARN_ALL_UNSEEDED_RANDOM.
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      eecabf56