1. 28 Jun, 2018 3 commits
  2. 25 Jun, 2018 6 commits
    • Randy Dunlap's avatar
      kconfig: document Kconfig source file comments · bdb60101
      Randy Dunlap authored
      I saw this type of Kconfig construct on LKML:
      
      config SYMBOOL
      	#bool "prompt string"
      	default y
      
      and wondered what it does.  Then I wondered if '#' comments are
      even documented.  They aren't, so add a little doc for that.
      
      Ah, good.  kconfig says:
      arch/x86/Kconfig:2942:warning: config symbol defined without type
      Signed-off-by: default avatarRandy Dunlap <rdunlap@infradead.org>
      Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
      bdb60101
    • Dirk Gouders's avatar
      kconfig: fix line numbers for if-entries in menu tree · b2d00d7c
      Dirk Gouders authored
      The line numers for if-entries in the menu tree are off by one or more
      lines which is confusing when debugging for correctness of unrelated changes.
      
      According to the git log, commit a02f0570 (kconfig: improve
      error handling in the parser) was the last one that changed that part
      of the parser and replaced
      
      	"if_entry: T_IF expr T_EOL"
      by
      	"if_entry: T_IF expr nl"
      
      but the commit message does not state why this has been done.
      
      When reverting that part of the commit, only the line numers are
      corrected (checked with cdebug = DEBUG_PARSE in zconf.y), otherwise
      the menu tree remains unchanged (checked with zconfdump() enabled in
      conf.c).
      
      An example for the corrected line numbers:
      
      drivers/soc/Kconfig:15:source drivers/soc/tegra/Kconfig
      drivers/soc/tegra/Kconfig:4:if
      drivers/soc/tegra/Kconfig:6:if
      
      changes to:
      
      drivers/soc/Kconfig:15:source drivers/soc/tegra/Kconfig
      drivers/soc/tegra/Kconfig:1:if
      drivers/soc/tegra/Kconfig:4:if
      Signed-off-by: default avatarDirk Gouders <dirk@gouders.net>
      Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
      b2d00d7c
    • Sven Joachim's avatar
      stack-protector: Fix test with 32-bit userland and CONFIG_64BIT=y · 5391e536
      Sven Joachim authored
      When building a 64-bit 4.18-rc1 kernel with a 32-bit userland, I
      noticed that stack protection was silently disabled.  Adding -m64 in
      gcc-x86_64-has-stack-protector.sh fixed that, similar to what has been
      noticed in commit 2a61f474 ("stack-protector: test compiler
      capability in Kconfig and drop AUTO mode") for
      gcc-x86_32-has-stack-protector.sh.
      Signed-off-by: default avatarSven Joachim <svenjoac@gmx.de>
      Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
      5391e536
    • Paul Burton's avatar
      powerpc: Remove -Wattribute-alias pragmas · ac851744
      Paul Burton authored
      With SYSCALL_DEFINEx() disabling -Wattribute-alias generically, there's
      no need to duplicate that for PowerPC syscalls.
      
      This reverts commit 41552037 ("powerpc: fix build failure by
      disabling attribute-alias warning in pci_32") and commit 2479bfc9
      ("powerpc: Fix build by disabling attribute-alias warning for
      SYSCALL_DEFINEx").
      Signed-off-by: default avatarPaul Burton <paul.burton@mips.com>
      Acked-by: default avatarChristophe Leroy <christophe.leroy@c-s.fr>
      Acked-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
      ac851744
    • Arnd Bergmann's avatar
      disable -Wattribute-alias warning for SYSCALL_DEFINEx() · bee20031
      Arnd Bergmann authored
      gcc-8 warns for every single definition of a system call entry
      point, e.g.:
      
      include/linux/compat.h:56:18: error: 'compat_sys_rt_sigprocmask' alias between functions of incompatible types 'long int(int,  compat_sigset_t *, compat_sigset_t *, compat_size_t)' {aka 'long int(int,  struct <anonymous> *, struct <anonymous> *, unsigned int)'} and 'long int(long int,  long int,  long int,  long int)' [-Werror=attribute-alias]
        asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))\
                        ^~~~~~~~~~
      include/linux/compat.h:45:2: note: in expansion of macro 'COMPAT_SYSCALL_DEFINEx'
        COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)
        ^~~~~~~~~~~~~~~~~~~~~~
      kernel/signal.c:2601:1: note: in expansion of macro 'COMPAT_SYSCALL_DEFINE4'
       COMPAT_SYSCALL_DEFINE4(rt_sigprocmask, int, how, compat_sigset_t __user *, nset,
       ^~~~~~~~~~~~~~~~~~~~~~
      include/linux/compat.h:60:18: note: aliased declaration here
        asmlinkage long compat_SyS##name(__MAP(x,__SC_LONG,__VA_ARGS__))\
                        ^~~~~~~~~~
      
      The new warning seems reasonable in principle, but it doesn't
      help us here, since we rely on the type mismatch to sanitize the
      system call arguments. After I reported this as GCC PR82435, a new
      -Wno-attribute-alias option was added that could be used to turn the
      warning off globally on the command line, but I'd prefer to do it a
      little more fine-grained.
      
      Interestingly, turning a warning off and on again inside of
      a single macro doesn't always work, in this case I had to add
      an extra statement inbetween and decided to copy the __SC_TEST
      one from the native syscall to the compat syscall macro.  See
      https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83256 for more details
      about this.
      
      [paul.burton@mips.com:
        - Rebase atop current master.
        - Split GCC & version arguments to __diag_ignore() in order to match
          changes to the preceding patch.
        - Add the comment argument to match the preceding patch.]
      
      Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82435Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Signed-off-by: default avatarPaul Burton <paul.burton@mips.com>
      Tested-by: default avatarChristophe Leroy <christophe.leroy@c-s.fr>
      Tested-by: default avatarStafford Horne <shorne@gmail.com>
      Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
      bee20031
    • Arnd Bergmann's avatar
      kbuild: add macro for controlling warnings to linux/compiler.h · 8793bb7f
      Arnd Bergmann authored
      I have occasionally run into a situation where it would make sense to
      control a compiler warning from a source file rather than doing so from
      a Makefile using the $(cc-disable-warning, ...) or $(cc-option, ...)
      helpers.
      
      The approach here is similar to what glibc uses, using __diag() and
      related macros to encapsulate a _Pragma("GCC diagnostic ...") statement
      that gets turned into the respective "#pragma GCC diagnostic ..." by
      the preprocessor when the macro gets expanded.
      
      Like glibc, I also have an argument to pass the affected compiler
      version, but decided to actually evaluate that one. For now, this
      supports GCC_4_6, GCC_4_7, GCC_4_8, GCC_4_9, GCC_5, GCC_6, GCC_7,
      GCC_8 and GCC_9. Adding support for CLANG_5 and other interesting
      versions is straightforward here. GNU compilers starting with gcc-4.2
      could support it in principle, but "#pragma GCC diagnostic push"
      was only added in gcc-4.6, so it seems simpler to not deal with those
      at all. The same versions show a large number of warnings already,
      so it seems easier to just leave it at that and not do a more
      fine-grained control for them.
      
      The use cases I found so far include:
      
      - turning off the gcc-8 -Wattribute-alias warning inside of the
        SYSCALL_DEFINEx() macro without having to do it globally.
      
      - Reducing the build time for a simple re-make after a change,
        once we move the warnings from ./Makefile and
        ./scripts/Makefile.extrawarn into linux/compiler.h
      
      - More control over the warnings based on other configurations,
        using preprocessor syntax instead of Makefile syntax. This should make
        it easier for the average developer to understand and change things.
      
      - Adding an easy way to turn the W=1 option on unconditionally
        for a subdirectory or a specific file. This has been requested
        by several developers in the past that want to have their subsystems
        W=1 clean.
      
      - Integrating clang better into the build systems. Clang supports
        more warnings than GCC, and we probably want to classify them
        as default, W=1, W=2 etc, but there are cases in which the
        warnings should be classified differently due to excessive false
        positives from one or the other compiler.
      
      - Adding a way to turn the default warnings into errors (e.g. using
        a new "make E=0" tag) while not also turning the W=1 warnings into
        errors.
      
      This patch for now just adds the minimal infrastructure in order to
      do the first of the list above. As the #pragma GCC diagnostic
      takes precedence over command line options, the next step would be
      to convert a lot of the individual Makefiles that set nonstandard
      options to use __diag() instead.
      
      [paul.burton@mips.com:
        - Rebase atop current master.
        - Add __diag_GCC, or more generally __diag_<compiler>, abstraction to
          avoid code outside of linux/compiler-gcc.h needing to duplicate
          knowledge about different GCC versions.
        - Add a comment argument to __diag_{ignore,warn,error} which isn't
          used in the expansion of the macros but serves to push people to
          document the reason for using them - per feedback from Kees Cook.
        - Translate severity to GCC-specific pragmas in linux/compiler-gcc.h
          rather than using GCC-specific in linux/compiler_types.h.
        - Drop all but GCC 8 macros, since we only need to define macros for
          versions that we need to introduce pragmas for, and as of this
          series that's just GCC 8.
        - Capitalize comments in linux/compiler-gcc.h to match the style of
          the rest of the file.
        - Line up macro definitions with tabs in linux/compiler-gcc.h.]
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Signed-off-by: default avatarPaul Burton <paul.burton@mips.com>
      Tested-by: default avatarChristophe Leroy <christophe.leroy@c-s.fr>
      Tested-by: default avatarStafford Horne <shorne@gmail.com>
      Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
      8793bb7f
  3. 16 Jun, 2018 8 commits
    • Linus Torvalds's avatar
      Linux 4.18-rc1 · ce397d21
      Linus Torvalds authored
      ce397d21
    • Linus Torvalds's avatar
      Merge tag 'for-linus-20180616' of git://git.kernel.dk/linux-block · 265c5596
      Linus Torvalds authored
      Pull block fixes from Jens Axboe:
       "A collection of fixes that should go into -rc1. This contains:
      
         - bsg_open vs bsg_unregister race fix (Anatoliy)
      
         - NVMe pull request from Christoph, with fixes for regressions in
           this window, FC connect/reconnect path code unification, and a
           trace point addition.
      
         - timeout fix (Christoph)
      
         - remove a few unused functions (Christoph)
      
         - blk-mq tag_set reinit fix (Roman)"
      
      * tag 'for-linus-20180616' of git://git.kernel.dk/linux-block:
        bsg: fix race of bsg_open and bsg_unregister
        block: remov blk_queue_invalidate_tags
        nvme-fabrics: fix and refine state checks in __nvmf_check_ready
        nvme-fabrics: handle the admin-only case properly in nvmf_check_ready
        nvme-fabrics: refactor queue ready check
        blk-mq: remove blk_mq_tagset_iter
        nvme: remove nvme_reinit_tagset
        nvme-fc: fix nulling of queue data on reconnect
        nvme-fc: remove reinit_request routine
        blk-mq: don't time out requests again that are in the timeout handler
        nvme-fc: change controllers first connect to use reconnect path
        nvme: don't rely on the changed namespace list log
        nvmet: free smart-log buffer after use
        nvme-rdma: fix error flow during mapping request data
        nvme: add bio remapping tracepoint
        nvme: fix NULL pointer dereference in nvme_init_subsystem
        blk-mq: reinit q->tag_set_list entry only after grace period
      265c5596
    • Linus Torvalds's avatar
      Merge tag 'docs-broken-links' of git://linuxtv.org/mchehab/experimental · 5e7b9212
      Linus Torvalds authored
      Pull documentation fixes from Mauro Carvalho Chehab:
       "This solves a series of broken links for files under Documentation,
        and improves a script meant to detect such broken links (see
        scripts/documentation-file-ref-check).
      
        The changes on this series are:
      
         - can.rst: fix a footnote reference;
      
         - crypto_engine.rst: Fix two parsing warnings;
      
         - Fix a lot of broken references to Documentation/*;
      
         - improve the scripts/documentation-file-ref-check script, in order
           to help detecting/fixing broken references, preventing
           false-positives.
      
        After this patch series, only 33 broken references to doc files are
        detected by scripts/documentation-file-ref-check"
      
      * tag 'docs-broken-links' of git://linuxtv.org/mchehab/experimental: (26 commits)
        fix a series of Documentation/ broken file name references
        Documentation: rstFlatTable.py: fix a broken reference
        ABI: sysfs-devices-system-cpu: remove a broken reference
        devicetree: fix a series of wrong file references
        devicetree: fix name of pinctrl-bindings.txt
        devicetree: fix some bindings file names
        MAINTAINERS: fix location of DT npcm files
        MAINTAINERS: fix location of some display DT bindings
        kernel-parameters.txt: fix pointers to sound parameters
        bindings: nvmem/zii: Fix location of nvmem.txt
        docs: Fix more broken references
        scripts/documentation-file-ref-check: check tools/*/Documentation
        scripts/documentation-file-ref-check: get rid of false-positives
        scripts/documentation-file-ref-check: hint: dash or underline
        scripts/documentation-file-ref-check: add a fix logic for DT
        scripts/documentation-file-ref-check: accept more wildcards at filenames
        scripts/documentation-file-ref-check: fix help message
        media: max2175: fix location of driver's companion documentation
        media: v4l: fix broken video4linux docs locations
        media: dvb: point to the location of the old README.dvb-usb file
        ...
      5e7b9212
    • Linus Torvalds's avatar
      Merge tag 'fsnotify_for_v4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs · dbb2816f
      Linus Torvalds authored
      Pull fsnotify updates from Jan Kara:
       "fsnotify cleanups unifying handling of different watch types.
      
        This is the shortened fsnotify series from Amir with the last five
        patches pulled out. Amir has modified those patches to not change
        struct inode but obviously it's too late for those to go into this
        merge window"
      
      * tag 'fsnotify_for_v4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
        fsnotify: add fsnotify_add_inode_mark() wrappers
        fanotify: generalize fanotify_should_send_event()
        fsnotify: generalize send_to_group()
        fsnotify: generalize iteration of marks by object type
        fsnotify: introduce marks iteration helpers
        fsnotify: remove redundant arguments to handle_event()
        fsnotify: use type id to identify connector object type
      dbb2816f
    • Linus Torvalds's avatar
      Merge tag 'fbdev-v4.18' of git://github.com/bzolnier/linux · 644f2639
      Linus Torvalds authored
      Pull fbdev updates from Bartlomiej Zolnierkiewicz:
       "There is nothing really major here, few small fixes, some cleanups and
        dead drivers removal:
      
         - mark omapfb drivers as orphans in MAINTAINERS file (Tomi Valkeinen)
      
         - add missing module license tags to omap/omapfb driver (Arnd
           Bergmann)
      
         - add missing GPIOLIB dependendy to omap2/omapfb driver (Arnd
           Bergmann)
      
         - convert savagefb, aty128fb & radeonfb drivers to use msleep & co.
           (Jia-Ju Bai)
      
         - allow COMPILE_TEST build for viafb driver (media part was reviewed
           by media subsystem Maintainer)
      
         - remove unused MERAM support from sh_mobile_lcdcfb and shmob-drm
           drivers (drm parts were acked by shmob-drm driver Maintainer)
      
         - remove unused auo_k190xfb drivers
      
         - misc cleanups (Souptick Joarder, Wolfram Sang, Markus Elfring, Andy
           Shevchenko, Colin Ian King)"
      
      * tag 'fbdev-v4.18' of git://github.com/bzolnier/linux: (26 commits)
        fb_omap2: add gpiolib dependency
        video/omap: add module license tags
        MAINTAINERS: make omapfb orphan
        video: fbdev: pxafb: match_string() conversion fixup
        video: fbdev: nvidia: fix spelling mistake: "scaleing" -> "scaling"
        video: fbdev: fix spelling mistake: "frambuffer" -> "framebuffer"
        video: fbdev: pxafb: Convert to use match_string() helper
        video: fbdev: via: allow COMPILE_TEST build
        video: fbdev: remove unused sh_mobile_meram driver
        drm: shmobile: remove unused MERAM support
        video: fbdev: sh_mobile_lcdcfb: remove unused MERAM support
        video: fbdev: remove unused auo_k190xfb drivers
        video: omap: Improve a size determination in omapfb_do_probe()
        video: sm501fb: Improve a size determination in sm501fb_probe()
        video: fbdev-MMP: Improve a size determination in path_init()
        video: fbdev-MMP: Delete an error message for a failed memory allocation in two functions
        video: auo_k190x: Delete an error message for a failed memory allocation in auok190x_common_probe()
        video: sh_mobile_lcdcfb: Delete an error message for a failed memory allocation in two functions
        video: sh_mobile_meram: Delete an error message for a failed memory allocation in sh_mobile_meram_probe()
        video: fbdev: sh_mobile_meram: Drop SUPERH platform dependency
        ...
      644f2639
    • Linus Torvalds's avatar
      Merge branch 'afs-proc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 35773c93
      Linus Torvalds authored
      Pull AFS updates from Al Viro:
       "Assorted AFS stuff - ended up in vfs.git since most of that consists
        of David's AFS-related followups to Christoph's procfs series"
      
      * 'afs-proc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        afs: Optimise callback breaking by not repeating volume lookup
        afs: Display manually added cells in dynamic root mount
        afs: Enable IPv6 DNS lookups
        afs: Show all of a server's addresses in /proc/fs/afs/servers
        afs: Handle CONFIG_PROC_FS=n
        proc: Make inline name size calculation automatic
        afs: Implement network namespacing
        afs: Mark afs_net::ws_cell as __rcu and set using rcu functions
        afs: Fix a Sparse warning in xdr_decode_AFSFetchStatus()
        proc: Add a way to make network proc files writable
        afs: Rearrange fs/afs/proc.c to remove remaining predeclarations.
        afs: Rearrange fs/afs/proc.c to move the show routines up
        afs: Rearrange fs/afs/proc.c by moving fops and open functions down
        afs: Move /proc management functions to the end of the file
      35773c93
    • Linus Torvalds's avatar
      Merge branch 'work.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 29d6849d
      Linus Torvalds authored
      Pull compat updates from Al Viro:
       "Some biarch patches - getting rid of assorted (mis)uses of
        compat_alloc_user_space().
      
        Not much in that area this cycle..."
      
      * 'work.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        orangefs: simplify compat ioctl handling
        signalfd: lift sigmask copyin and size checks to callers of do_signalfd4()
        vmsplice(): lift importing iovec into vmsplice(2) and compat counterpart
      29d6849d
    • Linus Torvalds's avatar
      Merge branch 'work.aio' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · a5b729ea
      Linus Torvalds authored
      Pull aio fixes from Al Viro:
       "Assorted AIO followups and fixes"
      
      * 'work.aio' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        eventpoll: switch to ->poll_mask
        aio: only return events requested in poll_mask() for IOCB_CMD_POLL
        eventfd: only return events requested in poll_mask()
        aio: mark __aio_sigset::sigmask const
      a5b729ea
  4. 15 Jun, 2018 23 commits