1. 23 Jan, 2022 4 commits
    • Linus Torvalds's avatar
      Merge tag 'trace-v5.17-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace · 67bfce0e
      Linus Torvalds authored
      Pull ftrace fix from Steven Rostedt:
       "Fix s390 breakage from sorting mcount tables.
      
        The latest merge of the tracing tree sorts the mcount table at build
        time. But s390 appears to do things differently (like always) and
        replaces the sorted table back to the original unsorted one. As the
        ftrace algorithm depends on it being sorted, bad things happen when it
        is not, and s390 experienced those bad things.
      
        Add a new config to tell the boot if the mcount table is sorted or
        not, and allow s390 to opt out of it"
      
      * tag 'trace-v5.17-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
        ftrace: Fix assuming build time sort works for s390
      67bfce0e
    • Steven Rostedt (Google)'s avatar
      ftrace: Fix assuming build time sort works for s390 · 6b9b6413
      Steven Rostedt (Google) authored
      To speed up the boot process, as mcount_loc needs to be sorted for ftrace
      to work properly, sorting it at build time is more efficient than boot up
      and can save milliseconds of time. Unfortunately, this change broke s390
      as it will modify the mcount_loc location after the sorting takes place
      and will put back the unsorted locations. Since the sorting is skipped at
      boot up if it is believed that it was sorted at run time, ftrace can crash
      as its algorithms are dependent on the list being sorted.
      
      Add a new config BUILDTIME_MCOUNT_SORT that is set when
      BUILDTIME_TABLE_SORT but not if S390 is set. Use this config to determine
      if sorting should take place at boot up.
      
      Link: https://lore.kernel.org/all/yt9dee51ctfn.fsf@linux.ibm.com/
      
      Fixes: 72b3942a ("scripts: ftrace - move the sort-processing in ftrace_init")
      Reported-by: default avatarSven Schnelle <svens@linux.ibm.com>
      Tested-by: default avatarHeiko Carstens <hca@linux.ibm.com>
      Signed-off-by: default avatarSteven Rostedt (Google) <rostedt@goodmis.org>
      6b9b6413
    • Linus Torvalds's avatar
      Merge tag 'kbuild-fixes-v5.17' of... · 473aec0e
      Linus Torvalds authored
      Merge tag 'kbuild-fixes-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
      
      Pull Kbuild fixes from Masahiro Yamada:
      
       - Bring include/uapi/linux/nfc.h into the UAPI compile-test coverage
      
       - Revert the workaround of CONFIG_CC_IMPLICIT_FALLTHROUGH
      
       - Fix build errors in certs/Makefile
      
      * tag 'kbuild-fixes-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
        certs: Fix build error when CONFIG_MODULE_SIG_KEY is empty
        certs: Fix build error when CONFIG_MODULE_SIG_KEY is PKCS#11 URI
        Revert "Makefile: Do not quote value for CONFIG_CC_IMPLICIT_FALLTHROUGH"
        usr/include/Makefile: add linux/nfc.h to the compile-test coverage
      473aec0e
    • Linus Torvalds's avatar
      Merge tag 'bitmap-5.17-rc1' of git://github.com/norov/linux · 3689f9f8
      Linus Torvalds authored
      Pull bitmap updates from Yury Norov:
      
       - introduce for_each_set_bitrange()
      
       - use find_first_*_bit() instead of find_next_*_bit() where possible
      
       - unify for_each_bit() macros
      
      * tag 'bitmap-5.17-rc1' of git://github.com/norov/linux:
        vsprintf: rework bitmap_list_string
        lib: bitmap: add performance test for bitmap_print_to_pagebuf
        bitmap: unify find_bit operations
        mm/percpu: micro-optimize pcpu_is_populated()
        Replace for_each_*_bit_from() with for_each_*_bit() where appropriate
        find: micro-optimize for_each_{set,clear}_bit()
        include/linux: move for_each_bit() macros from bitops.h to find.h
        cpumask: replace cpumask_next_* with cpumask_first_* where appropriate
        tools: sync tools/bitmap with mother linux
        all: replace find_next{,_zero}_bit with find_first{,_zero}_bit where appropriate
        cpumask: use find_first_and_bit()
        lib: add find_first_and_bit()
        arch: remove GENERIC_FIND_FIRST_BIT entirely
        include: move find.h from asm_generic to linux
        bitops: move find_bit_*_le functions from le.h to find.h
        bitops: protect find_first_{,zero}_bit properly
      3689f9f8
  2. 22 Jan, 2022 36 commits