1. 04 Oct, 2014 4 commits
  2. 08 Aug, 2014 1 commit
  3. 06 Aug, 2014 2 commits
  4. 17 Jul, 2014 1 commit
    • Davidlohr Bueso's avatar
      arch, locking: Ciao arch_mutex_cpu_relax() · 3a6bfbc9
      Davidlohr Bueso authored
      The arch_mutex_cpu_relax() function, introduced by 34b133f8
      
      , is
      hacky and ugly. It was added a few years ago to address the fact
      that common cpu_relax() calls include yielding on s390, and thus
      impact the optimistic spinning functionality of mutexes. Nowadays
      we use this function well beyond mutexes: rwsem, qrwlock, mcs and
      lockref. Since the macro that defines the call is in the mutex header,
      any users must include mutex.h and the naming is misleading as well.
      
      This patch (i) renames the call to cpu_relax_lowlatency  ("relax, but
      only if you can do it with very low latency") and (ii) defines it in
      each arch's asm/processor.h local header, just like for regular cpu_relax
      functions. On all archs, except s390, cpu_relax_lowlatency is simply cpu_relax,
      and thus we can take it out of mutex.h. While this can seem redundant,
      I believe it is a good choice as it allows us to move out arch specific
      logic from generic locking primitives and enables future(?) archs to
      transparently define it, similarly to System Z.
      Signed-off-by: default avatarDavidlohr Bueso <davidlohr@hp.com>
      Signed-off-by: default avatarPeter Zijlstra <peterz@infradead.org>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: Anton Blanchard <anton@samba.org>
      Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Bharat Bhushan <r65777@freescale.com>
      Cc: Catalin Marinas <catalin.marinas@arm.com>
      Cc: Chen Liqin <liqin.linux@gmail.com>
      Cc: Chris Metcalf <cmetcalf@tilera.com>
      Cc: Christian Borntraeger <borntraeger@de.ibm.com>
      Cc: Chris Zankel <chris@zankel.net>
      Cc: David Howells <dhowells@redhat.com>
      Cc: David S. Miller <davem@davemloft.net>
      Cc: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
      Cc: Dominik Dingel <dingel@linux.vnet.ibm.com>
      Cc: Fenghua Yu <fenghua.yu@intel.com>
      Cc: Geert Uytterhoeven <geert@linux-m68k.org>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
      Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
      Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
      Cc: Helge Deller <deller@gmx.de>
      Cc: Hirokazu Takata <takata@linux-m32r.org>
      Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
      Cc: James E.J. Bottomley <jejb@parisc-linux.org>
      Cc: James Hogan <james.hogan@imgtec.com>
      Cc: Jason Wang <jasowang@redhat.com>
      Cc: Jesper Nilsson <jesper.nilsson@axis.com>
      Cc: Joe Perches <joe@perches.com>
      Cc: Jonas Bonn <jonas@southpole.se>
      Cc: Joseph Myers <joseph@codesourcery.com>
      Cc: Kees Cook <keescook@chromium.org>
      Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
      Cc: Lennox Wu <lennox.wu@gmail.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Mark Salter <msalter@redhat.com>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Cc: Matt Turner <mattst88@gmail.com>
      Cc: Max Filippov <jcmvbkbc@gmail.com>
      Cc: Michael Neuling <mikey@neuling.org>
      Cc: Michal Simek <monstr@monstr.eu>
      Cc: Mikael Starvik <starvik@axis.com>
      Cc: Nicolas Pitre <nico@linaro.org>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: Paul Burton <paul.burton@imgtec.com>
      Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
      Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Qais Yousef <qais.yousef@imgtec.com>
      Cc: Qiaowei Ren <qiaowei.ren@intel.com>
      Cc: Rafael Wysocki <rafael.j.wysocki@intel.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Richard Henderson <rth@twiddle.net>
      Cc: Richard Kuo <rkuo@codeaurora.org>
      Cc: Russell King <linux@arm.linux.org.uk>
      Cc: Steven Miao <realmz6@gmail.com>
      Cc: Steven Rostedt <srostedt@redhat.com>
      Cc: Stratos Karafotis <stratosk@semaphore.gr>
      Cc: Tim Chen <tim.c.chen@linux.intel.com>
      Cc: Tony Luck <tony.luck@intel.com>
      Cc: Vasily Kulikov <segoon@openwall.com>
      Cc: Vineet Gupta <vgupta@synopsys.com>
      Cc: Vineet Gupta <Vineet.Gupta1@synopsys.com>
      Cc: Waiman Long <Waiman.Long@hp.com>
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: Wolfram Sang <wsa@the-dreams.de>
      Cc: adi-buildroot-devel@lists.sourceforge.net
      Cc: linux390@de.ibm.com
      Cc: linux-alpha@vger.kernel.org
      Cc: linux-am33-list@redhat.com
      Cc: linux-arm-kernel@lists.infradead.org
      Cc: linux-c6x-dev@linux-c6x.org
      Cc: linux-cris-kernel@axis.com
      Cc: linux-hexagon@vger.kernel.org
      Cc: linux-ia64@vger.kernel.org
      Cc: linux@lists.openrisc.net
      Cc: linux-m32r-ja@ml.linux-m32r.org
      Cc: linux-m32r@ml.linux-m32r.org
      Cc: linux-m68k@lists.linux-m68k.org
      Cc: linux-metag@vger.kernel.org
      Cc: linux-mips@linux-mips.org
      Cc: linux-parisc@vger.kernel.org
      Cc: linuxppc-dev@lists.ozlabs.org
      Cc: linux-s390@vger.kernel.org
      Cc: linux-sh@vger.kernel.org
      Cc: linux-xtensa@linux-xtensa.org
      Cc: sparclinux@vger.kernel.org
      Link: http://lkml.kernel.org/r/1404079773.2619.4.camel@buesod1.americas.hpqcorp.net
      
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      3a6bfbc9
  5. 18 Apr, 2014 1 commit
  6. 03 Apr, 2014 1 commit
  7. 13 Mar, 2014 1 commit
  8. 09 Feb, 2014 2 commits
    • Tim Chen's avatar
      locking/mcs: Allow architecture specific asm files to be used for contended case · ddf1d169
      Tim Chen authored
      
      
      This patch allows each architecture to add its specific assembly optimized
      arch_mcs_spin_lock_contended and arch_mcs_spinlock_uncontended for
      MCS lock and unlock functions.
      Signed-off-by: default avatarTim Chen <tim.c.chen@linux.intel.com>
      Cc: Scott J Norton <scott.norton@hp.com>
      Cc: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
      Cc: AswinChandramouleeswaran <aswin@hp.com>
      Cc: George Spelvin <linux@horizon.com>
      Cc: Rik vanRiel <riel@redhat.com>
      Cc: Andrea Arcangeli <aarcange@redhat.com>
      Cc: MichelLespinasse <walken@google.com>
      Cc: Peter Hurley <peter@hurleysoftware.com>
      Cc: Andi Kleen <andi@firstfloor.org>
      Cc: Alex Shi <alex.shi@linaro.org>
      Cc: Dave Hansen <dave.hansen@intel.com>
      Cc: Tim Chen <tim.c.chen@linux.intel.com>
      Cc: Arnd Bergmann <arnd@arndb.de>
      Cc: "Figo.zhang" <figo1802@gmail.com>
      Cc: "Paul E.McKenney" <paulmck@linux.vnet.ibm.com>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Davidlohr Bueso <davidlohr.bueso@hp.com>
      Cc: Waiman Long <waiman.long@hp.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Matthew R Wilcox <matthew.r.wilcox@intel.com>
      Signed-off-by: default avatarPeter Zijlstra <peterz@infradead.org>
      Link: http://lkml.kernel.org/r/1390347382.3138.67.camel@schen9-DESK
      
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      ddf1d169
    • Tim Chen's avatar
      locking/mcs: Order the header files in Kbuild of each architecture in alphabetical order · b119fa61
      Tim Chen authored
      
      
      We perform a clean up of the Kbuid files in each architecture.
      We order the files in each Kbuild in alphabetical order
      by running the below script.
      
      for i in arch/*/include/asm/Kbuild
      do
              cat $i | gawk '/^generic-y/ {
                      i = 3;
                      do {
                              for (; i <= NF; i++) {
                                      if ($i == "\\") {
                                              getline;
                                              i = 1;
                                              continue;
                                      }
                                      if ($i != "")
                                              hdr[$i] = $i;
                              }
                              break;
                      } while (1);
                      next;
              }
              // {
                      print $0;
              }
              END {
                      n = asort(hdr);
                      for (i = 1; i <= n; i++)
                              print "generic-y += " hdr[i];
              }' > ${i}.sorted;
              mv ${i}.sorted $i;
      done
      Signed-off-by: default avatarTim Chen <tim.c.chen@linux.intel.com>
      Cc: Arnd Bergmann <arnd@arndb.de>
      Cc: Matthew R Wilcox <matthew.r.wilcox@intel.com>
      Cc: AswinChandramouleeswaran <aswin@hp.com>
      Cc: Dave Hansen <dave.hansen@intel.com>
      Cc: "Paul E.McKenney" <paulmck@linux.vnet.ibm.com>
      Cc: Scott J Norton <scott.norton@hp.com>
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: "Figo.zhang" <figo1802@gmail.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Waiman Long <waiman.long@hp.com>
      Cc: Peter Hurley <peter@hurleysoftware.com>
      Cc: Andrea Arcangeli <aarcange@redhat.com>
      Cc: Tim Chen <tim.c.chen@linux.intel.com>
      Cc: Alex Shi <alex.shi@linaro.org>
      Cc: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
      Cc: Andi Kleen <andi@firstfloor.org>
      Cc: George Spelvin <linux@horizon.com>
      Cc: MichelLespinasse <walken@google.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Davidlohr Bueso <davidlohr.bueso@hp.com>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarPeter Zijlstra <peterz@infradead.org>
      [ Fixed build bug. ]
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      b119fa61
  9. 21 Jan, 2014 1 commit
  10. 13 Jan, 2014 2 commits
  11. 12 Jan, 2014 1 commit
  12. 17 Dec, 2013 1 commit
  13. 10 Dec, 2013 1 commit
  14. 14 Nov, 2013 1 commit
  15. 13 Nov, 2013 1 commit
  16. 25 Sep, 2013 4 commits
  17. 13 Sep, 2013 1 commit
  18. 12 Sep, 2013 2 commits
    • Johannes Weiner's avatar
      arch: mm: pass userspace fault flag to generic fault handler · 759496ba
      Johannes Weiner authored
      
      
      Unlike global OOM handling, memory cgroup code will invoke the OOM killer
      in any OOM situation because it has no way of telling faults occuring in
      kernel context - which could be handled more gracefully - from
      user-triggered faults.
      
      Pass a flag that identifies faults originating in user space from the
      architecture-specific fault handlers to generic code so that memcg OOM
      handling can be improved.
      Signed-off-by: default avatarJohannes Weiner <hannes@cmpxchg.org>
      Reviewed-by: default avatarMichal Hocko <mhocko@suse.cz>
      Cc: David Rientjes <rientjes@google.com>
      Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
      Cc: azurIt <azurit@pobox.sk>
      Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      759496ba
    • Johannes Weiner's avatar
      arch: mm: remove obsolete init OOM protection · 94bce453
      Johannes Weiner authored
      The memcg code can trap tasks in the context of the failing allocation
      until an OOM situation is resolved.  They can hold all kinds of locks
      (fs, mm) at this point, which makes it prone to deadlocking.
      
      This series converts memcg OOM handling into a two step process that is
      started in the charge context, but any waiting is done after the fault
      stack is fully unwound.
      
      Patches 1-4 prepare architecture handlers to support the new memcg
      requirements, but in doing so they also remove old cruft and unify
      out-of-memory behavior across architectures.
      
      Patch 5 disables the memcg OOM handling for syscalls, readahead, kernel
      faults, because they can gracefully unwind the stack with -ENOMEM.  OOM
      handling is restricted to user triggered faults that have no other
      option.
      
      Patch 6 reworks memcg's hierarchical OOM locking to make it a little
      more obvious wth is going on in there: reduce locked regions, rename
      locking functions, reorder and document.
      
      Patch 7 implements the two-part OOM handling such that tasks are never
      trapped with the full charge stack in an OOM situation.
      
      This patch:
      
      Back before smart OOM killing, when faulting tasks were killed directly on
      allocation failures, the arch-specific fault handlers needed special
      protection for the init process.
      
      Now that all fault handlers call into the generic OOM killer (see commit
      609838cf
      
      : "mm: invoke oom-killer from remaining unconverted page
      fault handlers"), which already provides init protection, the
      arch-specific leftovers can be removed.
      Signed-off-by: default avatarJohannes Weiner <hannes@cmpxchg.org>
      Reviewed-by: default avatarMichal Hocko <mhocko@suse.cz>
      Acked-by: default avatarKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
      Cc: David Rientjes <rientjes@google.com>
      Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
      Cc: azurIt <azurit@pobox.sk>
      Acked-by: Vineet Gupta <vgupta@synopsys.com>	[arch/arc bits]
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      94bce453
  19. 13 Aug, 2013 1 commit
    • Chen Gang's avatar
      arch: *: Kconfig: add "kernel/Kconfig.freezer" to "arch/*/Kconfig" · 57a1a197
      Chen Gang authored
      
      
      All architectures include "kernel/Kconfig.freezer" except three left, so
      let them include it too, or 'allmodconfig' will report error.
      
      The related errors: (with allmodconfig for openrisc):
      
          CC      kernel/cgroup_freezer.o
        kernel/cgroup_freezer.c: In function 'freezer_css_online':
        kernel/cgroup_freezer.c:133:15: error: 'system_freezing_cnt' undeclared (first use in this function)
        kernel/cgroup_freezer.c:133:15: note: each undeclared identifier is reported only once for each function it appears in
        kernel/cgroup_freezer.c: In function 'freezer_css_offline':
        kernel/cgroup_freezer.c:157:15: error: 'system_freezing_cnt' undeclared (first use in this function)
        kernel/cgroup_freezer.c: In function 'freezer_attach':
        kernel/cgroup_freezer.c:200:4: error: implicit declaration of function 'freeze_task'
        kernel/cgroup_freezer.c: In function 'freezer_apply_state':
        kernel/cgroup_freezer.c:371:16: error: 'system_freezing_cnt' undeclared (first use in this function)
      Signed-off-by: default avatarChen Gang <gang.chen@asianux.com>
      Cc: Richard Kuo <rkuo@codeaurora.org>
      Cc: Jonas Bonn <jonas@southpole.se>
      Cc: Chen Liqin <liqin.chen@sunplusct.com>
      Cc: Lennox Wu <lennox.wu@gmail.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      57a1a197
  20. 14 Jul, 2013 1 commit
    • Paul Gortmaker's avatar
      score: delete __cpuinit usage from all score files · 70e2a7bf
      Paul Gortmaker authored
      The __cpuinit type of throwaway sections might have made sense
      some time ago when RAM was more constrained, but now the savings
      do not offset the cost and complications.  For example, the fix in
      commit 5e427ec2 ("x86: Fix bit corruption at CPU resume time")
      is a good example of the nasty type of bugs that can be created
      with improper use of the various __init prefixes.
      
      After a discussion on LKML[1] it was decided that cpuinit should go
      the way of devinit and be phased out.  Once all the users are gone,
      we can then finally remove the macros themselves from linux/init.h.
      
      Note that some harmless section mismatch warnings may result, since
      notify_cpu_starting() and cpu_up() are arch independent (kernel/cpu.c)
      are flagged as __cpuinit  -- so if we remove the __cpuinit from
      arch specific callers, we will also get section mismatch warnings.
      As an intermediate step, we intend to turn the linux/init.h cpuinit
      content into no-ops as early as possible, since that will get rid
      of these warnings.  In any case, they are temporary and harmless.
      
      This removes all the arch/score uses of the __cpuinit macros from
      all C files.  Currently score does not have any __CPUINIT used in
      assembly files.
      
      [1] https://lkml.org/lkml/2013/5/20/589
      
      
      
      Cc: Chen Liqin <liqin.chen@sunplusct.com>
      Cc: Lennox Wu <lennox.wu@gmail.com>
      Signed-off-by: default avatarPaul Gortmaker <paul.gortmaker@windriver.com>
      70e2a7bf
  21. 09 Jul, 2013 1 commit
    • Johannes Weiner's avatar
      mm: invoke oom-killer from remaining unconverted page fault handlers · 609838cf
      Johannes Weiner authored
      A few remaining architectures directly kill the page faulting task in an
      out of memory situation.  This is usually not a good idea since that
      task might not even use a significant amount of memory and so may not be
      the optimal victim to resolve the situation.
      
      Since 2.6.29's 1c0fe6e3
      
       ("mm: invoke oom-killer from page fault") there
      is a hook that architecture page fault handlers are supposed to call to
      invoke the OOM killer and let it pick the right task to kill.  Convert
      the remaining architectures over to this hook.
      
      To have the previous behavior of simply taking out the faulting task the
      vm.oom_kill_allocating_task sysctl can be set to 1.
      Signed-off-by: default avatarJohannes Weiner <hannes@cmpxchg.org>
      Reviewed-by: default avatarMichal Hocko <mhocko@suse.cz>
      Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
      Acked-by: default avatarDavid Rientjes <rientjes@google.com>
      Acked-by: Vineet Gupta <vgupta@synopsys.com>   [arch/arc bits]
      Cc: James Hogan <james.hogan@imgtec.com>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Jonas Bonn <jonas@southpole.se>
      Cc: Chen Liqin <liqin.chen@sunplusct.com>
      Cc: Lennox Wu <lennox.wu@gmail.com>
      Cc: Chris Metcalf <cmetcalf@tilera.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      609838cf
  22. 03 Jul, 2013 4 commits
    • Jiang Liu's avatar
      mm/score: prepare for removing num_physpages and simplify mem_init() · ad941989
      Jiang Liu authored
      
      
      Prepare for removing num_physpages and simplify mem_init().
      Signed-off-by: default avatarJiang Liu <jiang.liu@huawei.com>
      Cc: Chen Liqin <liqin.chen@sunplusct.com>
      Cc: Lennox Wu <lennox.wu@gmail.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      ad941989
    • Jiang Liu's avatar
      score: normalize global variables exported by vmlinux.lds · ae49b83d
      Jiang Liu authored
      
      
      Generate mandatory global variables _sdata in file vmlinux.lds.
      Signed-off-by: default avatarJiang Liu <jiang.liu@huawei.com>
      Cc: Chen Liqin <liqin.chen@sunplusct.com>
      Cc: Lennox Wu <lennox.wu@gmail.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      ae49b83d
    • Jiang Liu's avatar
      mm: concentrate modification of totalram_pages into the mm core · 0c988534
      Jiang Liu authored
      
      
      Concentrate code to modify totalram_pages into the mm core, so the arch
      memory initialized code doesn't need to take care of it.  With these
      changes applied, only following functions from mm core modify global
      variable totalram_pages: free_bootmem_late(), free_all_bootmem(),
      free_all_bootmem_node(), adjust_managed_page_count().
      
      With this patch applied, it will be much more easier for us to keep
      totalram_pages and zone->managed_pages in consistence.
      Signed-off-by: default avatarJiang Liu <jiang.liu@huawei.com>
      Acked-by: default avatarDavid Howells <dhowells@redhat.com>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: "Michael S. Tsirkin" <mst@redhat.com>
      Cc: <sworddragon2@aol.com>
      Cc: Arnd Bergmann <arnd@arndb.de>
      Cc: Catalin Marinas <catalin.marinas@arm.com>
      Cc: Chris Metcalf <cmetcalf@tilera.com>
      Cc: Geert Uytterhoeven <geert@linux-m68k.org>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Jeremy Fitzhardinge <jeremy@goop.org>
      Cc: Jianguo Wu <wujianguo@huawei.com>
      Cc: Joonsoo Kim <js1304@gmail.com>
      Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
      Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      Cc: Marek Szyprowski <m.szyprowski@samsung.com>
      Cc: Mel Gorman <mel@csn.ul.ie>
      Cc: Michel Lespinasse <walken@google.com>
      Cc: Minchan Kim <minchan@kernel.org>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Rusty Russell <rusty@rustcorp.com.au>
      Cc: Tang Chen <tangchen@cn.fujitsu.com>
      Cc: Tejun Heo <tj@kernel.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Wen Congyang <wency@cn.fujitsu.com>
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
      Cc: Yinghai Lu <yinghai@kernel.org>
      Cc: Russell King <rmk@arm.linux.org.uk>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      0c988534
    • Jiang Liu's avatar
      mm: change signature of free_reserved_area() to fix building warnings · 11199692
      Jiang Liu authored
      
      
      Change signature of free_reserved_area() according to Russell King's
      suggestion to fix following build warnings:
      
        arch/arm/mm/init.c: In function 'mem_init':
        arch/arm/mm/init.c:603:2: warning: passing argument 1 of 'free_reserved_area' makes integer from pointer without a cast [enabled by default]
          free_reserved_area(__va(PHYS_PFN_OFFSET), swapper_pg_dir, 0, NULL);
          ^
        In file included from include/linux/mman.h:4:0,
                         from arch/arm/mm/init.c:15:
        include/linux/mm.h:1301:22: note: expected 'long unsigned int' but argument is of type 'void *'
         extern unsigned long free_reserved_area(unsigned long start, unsigned long end,
      
         mm/page_alloc.c: In function 'free_reserved_area':
      >> mm/page_alloc.c:5134:3: warning: passing argument 1 of 'virt_to_phys' makes pointer from integer without a cast [enabled by default]
         In file included from arch/mips/include/asm/page.h:49:0,
                          from include/linux/mmzone.h:20,
                          from include/linux/gfp.h:4,
                          from include/linux/mm.h:8,
                          from mm/page_alloc.c:18:
         arch/mips/include/asm/io.h:119:29: note: expected 'const volatile void *' but argument is of type 'long unsigned int'
         mm/page_alloc.c: In function 'free_area_init_nodes':
         mm/page_alloc.c:5030:34: warning: array subscript is below array bounds [-Warray-bounds]
      
      Also address some minor code review comments.
      Signed-off-by: default avatarJiang Liu <jiang.liu@huawei.com>
      Reported-by: default avatarArnd Bergmann <arnd@arndb.de>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: "Michael S. Tsirkin" <mst@redhat.com>
      Cc: <sworddragon2@aol.com>
      Cc: Catalin Marinas <catalin.marinas@arm.com>
      Cc: Chris Metcalf <cmetcalf@tilera.com>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Geert Uytterhoeven <geert@linux-m68k.org>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Jeremy Fitzhardinge <jeremy@goop.org>
      Cc: Jianguo Wu <wujianguo@huawei.com>
      Cc: Joonsoo Kim <js1304@gmail.com>
      Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
      Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      Cc: Marek Szyprowski <m.szyprowski@samsung.com>
      Cc: Mel Gorman <mel@csn.ul.ie>
      Cc: Michel Lespinasse <walken@google.com>
      Cc: Minchan Kim <minchan@kernel.org>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Rusty Russell <rusty@rustcorp.com.au>
      Cc: Tang Chen <tangchen@cn.fujitsu.com>
      Cc: Tejun Heo <tj@kernel.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Wen Congyang <wency@cn.fujitsu.com>
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
      Cc: Yinghai Lu <yinghai@kernel.org>
      Cc: Russell King <rmk@arm.linux.org.uk>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      11199692
  23. 29 Jun, 2013 1 commit
  24. 23 Jun, 2013 2 commits
  25. 25 May, 2013 1 commit
  26. 30 Apr, 2013 1 commit
    • Tejun Heo's avatar
      dump_stack: unify debug information printed by show_regs() · a43cb95d
      Tejun Heo authored
      
      
      show_regs() is inherently arch-dependent but it does make sense to print
      generic debug information and some archs already do albeit in slightly
      different forms.  This patch introduces a generic function to print debug
      information from show_regs() so that different archs print out the same
      information and it's much easier to modify what's printed.
      
      show_regs_print_info() prints out the same debug info as dump_stack()
      does plus task and thread_info pointers.
      
      * Archs which didn't print debug info now do.
      
        alpha, arc, blackfin, c6x, cris, frv, h8300, hexagon, ia64, m32r,
        metag, microblaze, mn10300, openrisc, parisc, score, sh64, sparc,
        um, xtensa
      
      * Already prints debug info.  Replaced with show_regs_print_info().
        The printed information is superset of what used to be there.
      
        arm, arm64, avr32, mips, powerpc, sh32, tile, unicore32, x86
      
      * s390 is special in that it used to print arch-specific information
        along with generic debug info.  Heiko and Martin think that the
        arch-specific extra isn't worth keeping s390 specfic implementation.
        Converted to use the generic version.
      
      Note that now all archs print the debug info before actual register
      dumps.
      
      An example BUG() dump follows.
      
       kernel BUG at /work/os/work/kernel/workqueue.c:4841!
       invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
       Modules linked in:
       CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.9.0-rc1-work+ #7
       Hardware name: empty empty/S3992, BIOS 080011  10/26/2007
       task: ffff88007c85e040 ti: ffff88007c860000 task.ti: ffff88007c860000
       RIP: 0010:[<ffffffff8234a07e>]  [<ffffffff8234a07e>] init_workqueues+0x4/0x6
       RSP: 0000:ffff88007c861ec8  EFLAGS: 00010246
       RAX: ffff88007c861fd8 RBX: ffffffff824466a8 RCX: 0000000000000001
       RDX: 0000000000000046 RSI: 0000000000000001 RDI: ffffffff8234a07a
       RBP: ffff88007c861ec8 R08: 0000000000000000 R09: 0000000000000000
       R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8234a07a
       R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
       FS:  0000000000000000(0000) GS:ffff88007dc00000(0000) knlGS:0000000000000000
       CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
       CR2: ffff88015f7ff000 CR3: 00000000021f1000 CR4: 00000000000007f0
       DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
       DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
       Stack:
        ffff88007c861ef8 ffffffff81000312 ffffffff824466a8 ffff88007c85e650
        0000000000000003 0000000000000000 ffff88007c861f38 ffffffff82335e5d
        ffff88007c862080 ffffffff8223d8c0 ffff88007c862080 ffffffff81c47760
       Call Trace:
        [<ffffffff81000312>] do_one_initcall+0x122/0x170
        [<ffffffff82335e5d>] kernel_init_freeable+0x9b/0x1c8
        [<ffffffff81c47760>] ? rest_init+0x140/0x140
        [<ffffffff81c4776e>] kernel_init+0xe/0xf0
        [<ffffffff81c6be9c>] ret_from_fork+0x7c/0xb0
        [<ffffffff81c47760>] ? rest_init+0x140/0x140
        ...
      
      v2: Typo fix in x86-32.
      
      v3: CPU number dropped from show_regs_print_info() as
          dump_stack_print_info() has been updated to print it.  s390
          specific implementation dropped as requested by s390 maintainers.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Acked-by: default avatarDavid S. Miller <davem@davemloft.net>
      Acked-by: default avatarJesper Nilsson <jesper.nilsson@axis.com>
      Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Cc: Bjorn Helgaas <bhelgaas@google.com>
      Cc: Fengguang Wu <fengguang.wu@intel.com>
      Cc: Mike Frysinger <vapier@gentoo.org>
      Cc: Vineet Gupta <vgupta@synopsys.com>
      Cc: Sam Ravnborg <sam@ravnborg.org>
      Acked-by: Chris Metcalf <cmetcalf@tilera.com>		[tile bits]
      Acked-by: Richard Kuo <rkuo@codeaurora.org>		[hexagon bits]
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      a43cb95d