1. 08 May, 2012 1 commit
  2. 28 Mar, 2012 2 commits
  3. 23 Mar, 2012 1 commit
  4. 06 Mar, 2012 6 commits
  5. 26 Feb, 2012 1 commit
    • Grant Likely's avatar
      irq_domain: Centralize definition of irq_dispose_mapping() · d593f25f
      Grant Likely authored
      
      
      Several architectures define their own empty irq_dispose_mapping().  Since
      the irq_domain code is centralized now, there is little need to do so.  This
      patch removes them and creates a new empty copy when !CONFIG_IRQ_DOMAIN is
      selected.
      
      The patch also means that IRQ_DOMAIN becomes selectable on all architectures.
      Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
      Cc: Rob Herring <rob.herring@calxeda.com>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: Jonas Bonn <jonas@southpole.se>
      Cc: sparclinux@vger.kernel.org
      Cc: linux@lists.openrisc.net
      d593f25f
  6. 17 Feb, 2012 10 commits
  7. 14 Jan, 2012 1 commit
    • Stephen Warren's avatar
      Kbuild: Use dtc's -d (dependency) option · 7c431851
      Stephen Warren authored
      
      
      This hooks dtc into Kbuild's dependency system.
      
      Thus, for example, "make dtbs" will rebuild tegra-harmony.dtb if only
      tegra20.dtsi has changed yet tegra-harmony.dts has not. The previous
      lack of this feature recently caused me to have very confusing "git
      bisect" results.
      
      For ARM, it's obvious what to add to $(targets). I'm not familiar enough
      with other architectures to know what to add there. Powerpc appears to
      already add various .dtb files into $(targets), but the other archs may
      need something added to $(targets) to work.
      Signed-off-by: default avatarStephen Warren <swarren@nvidia.com>
      Acked-by: default avatarShawn Guo <shawn.guo@linaro.org>
      [mmarek: Dropped arch/c6x part to avoid merging commits from the middle
      of the merge window]
      Signed-off-by: default avatarMichal Marek <mmarek@suse.cz>
      7c431851
  8. 11 Jan, 2012 1 commit
  9. 11 Dec, 2011 3 commits
    • Frederic Weisbecker's avatar
      nohz: Remove tick_nohz_idle_enter_norcu() / tick_nohz_idle_exit_norcu() · 1268fbc7
      Frederic Weisbecker authored
      
      
      Those two APIs were provided to optimize the calls of
      tick_nohz_idle_enter() and rcu_idle_enter() into a single
      irq disabled section. This way no interrupt happening in-between would
      needlessly process any RCU job.
      
      Now we are talking about an optimization for which benefits
      have yet to be measured. Let's start simple and completely decouple
      idle rcu and dyntick idle logics to simplify.
      Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Reviewed-by: default avatarJosh Triplett <josh@joshtriplett.org>
      Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
      1268fbc7
    • Frederic Weisbecker's avatar
      nohz: Allow rcu extended quiescent state handling seperately from tick stop · 2bbb6817
      Frederic Weisbecker authored
      
      
      It is assumed that rcu won't be used once we switch to tickless
      mode and until we restart the tick. However this is not always
      true, as in x86-64 where we dereference the idle notifiers after
      the tick is stopped.
      
      To prepare for fixing this, add two new APIs:
      tick_nohz_idle_enter_norcu() and tick_nohz_idle_exit_norcu().
      
      If no use of RCU is made in the idle loop between
      tick_nohz_enter_idle() and tick_nohz_exit_idle() calls, the arch
      must instead call the new *_norcu() version such that the arch doesn't
      need to call rcu_idle_enter() and rcu_idle_exit().
      
      Otherwise the arch must call tick_nohz_enter_idle() and
      tick_nohz_exit_idle() and also call explicitly:
      
      - rcu_idle_enter() after its last use of RCU before the CPU is put
      to sleep.
      - rcu_idle_exit() before the first use of RCU after the CPU is woken
      up.
      Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Mike Frysinger <vapier@gentoo.org>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Cc: David Miller <davem@davemloft.net>
      Cc: Chris Metcalf <cmetcalf@tilera.com>
      Cc: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Russell King <linux@arm.linux.org.uk>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
      Cc: Paul Mundt <lethal@linux-sh.org>
      Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
      2bbb6817
    • Frederic Weisbecker's avatar
      nohz: Separate out irq exit and idle loop dyntick logic · 280f0677
      Frederic Weisbecker authored
      
      
      The tick_nohz_stop_sched_tick() function, which tries to delay
      the next timer tick as long as possible, can be called from two
      places:
      
      - From the idle loop to start the dytick idle mode
      - From interrupt exit if we have interrupted the dyntick
      idle mode, so that we reprogram the next tick event in
      case the irq changed some internal state that requires this
      action.
      
      There are only few minor differences between both that
      are handled by that function, driven by the ts->inidle
      cpu variable and the inidle parameter. The whole guarantees
      that we only update the dyntick mode on irq exit if we actually
      interrupted the dyntick idle mode, and that we enter in RCU extended
      quiescent state from idle loop entry only.
      
      Split this function into:
      
      - tick_nohz_idle_enter(), which sets ts->inidle to 1, enters
      dynticks idle mode unconditionally if it can, and enters into RCU
      extended quiescent state.
      
      - tick_nohz_irq_exit() which only updates the dynticks idle mode
      when ts->inidle is set (ie: if tick_nohz_idle_enter() has been called).
      
      To maintain symmetry, tick_nohz_restart_sched_tick() has been renamed
      into tick_nohz_idle_exit().
      
      This simplifies the code and micro-optimize the irq exit path (no need
      for local_irq_save there). This also prepares for the split between
      dynticks and rcu extended quiescent state logics. We'll need this split to
      further fix illegal uses of RCU in extended quiescent states in the idle
      loop.
      Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Mike Frysinger <vapier@gentoo.org>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Cc: David Miller <davem@davemloft.net>
      Cc: Chris Metcalf <cmetcalf@tilera.com>
      Cc: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Russell King <linux@arm.linux.org.uk>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
      Cc: Paul Mundt <lethal@linux-sh.org>
      Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
      Reviewed-by: default avatarJosh Triplett <josh@joshtriplett.org>
      280f0677
  10. 08 Dec, 2011 3 commits
    • Tejun Heo's avatar
      memblock: s/memblock_analyze()/memblock_allow_resize()/ and update users · 1aadc056
      Tejun Heo authored
      
      
      The only function of memblock_analyze() is now allowing resize of
      memblock region arrays.  Rename it to memblock_allow_resize() and
      update its users.
      
      * The following users remain the same other than renaming.
      
        arm/mm/init.c::arm_memblock_init()
        microblaze/kernel/prom.c::early_init_devtree()
        powerpc/kernel/prom.c::early_init_devtree()
        openrisc/kernel/prom.c::early_init_devtree()
        sh/mm/init.c::paging_init()
        sparc/mm/init_64.c::paging_init()
        unicore32/mm/init.c::uc32_memblock_init()
      
      * In the following users, analyze was used to update total size which
        is no longer necessary.
      
        powerpc/kernel/machine_kexec.c::reserve_crashkernel()
        powerpc/kernel/prom.c::early_init_devtree()
        powerpc/mm/init_32.c::MMU_init()
        powerpc/mm/tlb_nohash.c::__early_init_mmu()  
        powerpc/platforms/ps3/mm.c::ps3_mm_add_memory()
        powerpc/platforms/embedded6xx/wii.c::wii_memory_fixups()
        sh/kernel/machine_kexec.c::reserve_crashkernel()
      
      * x86/kernel/e820.c::memblock_x86_fill() was directly setting
        memblock_can_resize before populating memblock and calling analyze
        afterwards.  Call memblock_allow_resize() before start populating.
      
      memblock_can_resize is now static inside memblock.c.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Yinghai Lu <yinghai@kernel.org>
      Cc: Russell King <linux@arm.linux.org.uk>
      Cc: Michal Simek <monstr@monstr.eu>
      Cc: Paul Mundt <lethal@linux-sh.org>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      1aadc056
    • Tejun Heo's avatar
      memblock: Kill memblock_init() · fe091c20
      Tejun Heo authored
      
      
      memblock_init() initializes arrays for regions and memblock itself;
      however, all these can be done with struct initializers and
      memblock_init() can be removed.  This patch kills memblock_init() and
      initializes memblock with struct initializer.
      
      The only difference is that the first dummy entries don't have .nid
      set to MAX_NUMNODES initially.  This doesn't cause any behavior
      difference.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Yinghai Lu <yinghai@kernel.org>
      Cc: Russell King <linux@arm.linux.org.uk>
      Cc: Michal Simek <monstr@monstr.eu>
      Cc: Paul Mundt <lethal@linux-sh.org>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      fe091c20
    • Tejun Heo's avatar
      memblock: Fix include breakages caused by 24aa0788 · 1c16d242
      Tejun Heo authored
      24aa0788
      
       (memblock, x86: Replace memblock_x86_reserve/free_range()
      with generic ones) removed arch/x86/include/asm/memblock.h and dropped
      its inclusion from include/linux/memblock.h which breaks other
      architectures which depended on the generic memblock.h pulling in the
      arch specific one.
      
      However, the proper fix isn't adding back the asm inclusion.  memblock
      doesn't have any arch dependent part and doesn't need arch specific
      header file and asm/memblock.h files are either practically empty or
      contain mostly unrelated arch specific stuff.
      
      * In microblaze, sh, powerpc, sparc and openrisc, asm/memblock.h is
        either empty or just contains unused MEMBLOCK_DBG() macro.  Remove
        them.
      
      * In arm and unicore32, asm/memblock.h contains arch specific stuff.
        Include it directly from its users.  It might be a good idea to
        rename the header file to avoid confusion.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Reported-by: default avatar"H. Peter Anvin" <hpa@zytor.com>
      Cc: Yinghai Lu <yinghai@kernel.org>
      Cc: Russell King <linux@arm.linux.org.uk>
      Cc: Michal Simek <monstr@monstr.eu>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Paul Mundt <lethal@linux-sh.org>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      1c16d242
  11. 24 Nov, 2011 1 commit
  12. 31 Oct, 2011 1 commit
  13. 27 Sep, 2011 1 commit
    • Paul Bolle's avatar
      doc: fix broken references · 395cf969
      Paul Bolle authored
      
      
      There are numerous broken references to Documentation files (in other
      Documentation files, in comments, etc.). These broken references are
      caused by typo's in the references, and by renames or removals of the
      Documentation files. Some broken references are simply odd.
      
      Fix these broken references, sometimes by dropping the irrelevant text
      they were part of.
      Signed-off-by: default avatarPaul Bolle <pebolle@tiscali.nl>
      Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
      395cf969
  14. 11 Sep, 2011 1 commit
    • Jonas Bonn's avatar
      Add missing DMA ops · 707b38a0
      Jonas Bonn authored
      
      
      For the initial architecture submission, not all of the DMA ops were
      implemented.  This patch adds the *map_page and *map_sg variants of the
      DMA mapping ops.
      
      This patch is currently of interest mainly to some drivers that haven't
      been submitted upstream yet.
      Signed-off-by: default avatarJonas Bonn <jonas@southpole.se>
      707b38a0
  15. 05 Sep, 2011 1 commit
    • Jonas Bonn's avatar
      openrisc: don't use pt_regs in struct sigcontext · d7cb6667
      Jonas Bonn authored
      
      
      As it was decided not to export struct pt_regs to userspace, struct
      sigcontext shouldn't be using it either.  The pt_regs struct for OpenRISC
      is kernel internal and the layout of the registers may change in the
      future.  The struct user_regs_struct is what is guaranteed to remain
      stable, so struct sigcontext may use that instead.
      
      This patch removes the usage of struct pt_regs in struct sigcontext and
      makes according changes in signal.c to get the register layout right.
      
      The usp field is removed from the sigcontext structure as this information
      is already contained in the user_regs_struct.
      Signed-off-by: default avatarJonas Bonn <jonas@southpole.se>
      Reviewed-by: default avatarEmilio Cota <cota@braap.org>
      d7cb6667
  16. 22 Jul, 2011 6 commits