1. 16 Sep, 2015 1 commit
    • Thomas Gleixner's avatar
      genirq: Remove irq argument from irq flow handlers · bd0b9ac4
      Thomas Gleixner authored
      Most interrupt flow handlers do not use the irq argument. Those few
      which use it can retrieve the irq number from the irq descriptor.
      
      Remove the argument.
      
      Search and replace was done with coccinelle and some extra helper
      scripts around it. Thanks to Julia for her help!
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Cc: Julia Lawall <Julia.Lawall@lip6.fr>
      Cc: Jiang Liu <jiang.liu@linux.intel.com>
      bd0b9ac4
  2. 27 Jul, 2015 1 commit
  3. 26 May, 2015 1 commit
  4. 07 Apr, 2013 1 commit
    • Will Deacon's avatar
      alpha: irq: run all handlers with interrupts disabled · e20800fd
      Will Deacon authored
      Linux has expected that interrupt handlers are executed with local
      interrupts disabled for a while now, so ensure that this is the case on
      Alpha even for non-device interrupts such as IPIs.
      
      Without this patch, secondary boot results in the following backtrace:
      
        warning: at kernel/softirq.c:139 __local_bh_enable+0xb8/0xd0()
        trace:
          __local_bh_enable+0xb8/0xd0
          irq_enter+0x74/0xa0
          scheduler_ipi+0x50/0x100
          handle_ipi+0x84/0x260
          do_entint+0x1ac/0x2e0
          irq_exit+0x60/0xa0
          handle_irq+0x98/0x100
          do_entint+0x2c8/0x2e0
          ret_from_sys_call+0x0/0x10
          load_balance+0x3e4/0x870
          cpu_idle+0x24/0x80
          rcu_eqs_enter_common.isra.38+0x0/0x120
          cpu_idle+0x40/0x80
          rest_init+0xc0/0xe0
          _stext+0x1c/0x20
      
      A similar dump occurs if you try to reboot using magic-sysrq.
      
      Cc: Richard Henderson <rth@twiddle.net>
      Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
      Cc: Matt Turner <mattst88@gmail.com>
      Reviewed-by: Matt Turner's avatarMatt Turner <mattst88@gmail.com>
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      Signed-off-by: default avatarMichael Cree <mcree@orcon.net.nz>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      e20800fd
  5. 28 Mar, 2012 1 commit
  6. 29 Mar, 2011 2 commits
  7. 02 Mar, 2011 2 commits
  8. 17 Jan, 2011 4 commits
  9. 10 Aug, 2010 1 commit
    • Michael Cree's avatar
      alpha: add performance monitor interrupt counter · 65d92064
      Michael Cree authored
      The following patches implement hardware performance events for the Alpha
      EV67 and later CPUs.  I have had this running on a Compaq XP1000 (EV67,
      single CPU) for a few days now.  Pretty cool -- discovered that the glibc
      exp2() library routine uses on average 985 cycles to execute 777 CPU
      instructions whereas Compaq's CPML library version of exp2() uses on
      average 32 cycles to execute 47 CPU instructions to achieve the same
      thing!
      
      This patch:
      
      Add performance monitor interrupt counternd and export the count to user
      space via /proc/interrupts.
      Signed-off-by: default avatarMichael Cree <mcree@orcon.net.nz>
      Cc: Richard Henderson <rth@twiddle.net>
      Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
      Cc: Matt Turner <mattst88@gmail.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Jay Estabrook <jay.estabrook@hp.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      65d92064
  10. 30 Mar, 2010 1 commit
    • Tejun Heo's avatar
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking... · 5a0e3ad6
      Tejun Heo authored
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
      
      percpu.h is included by sched.h and module.h and thus ends up being
      included when building most .c files.  percpu.h includes slab.h which
      in turn includes gfp.h making everything defined by the two files
      universally available and complicating inclusion dependencies.
      
      percpu.h -> slab.h dependency is about to be removed.  Prepare for
      this change by updating users of gfp and slab facilities include those
      headers directly instead of assuming availability.  As this conversion
      needs to touch large number of source files, the following script is
      used as the basis of conversion.
      
        http://userweb.kernel.org/~tj/misc/slabh-sweep.py
      
      The script does the followings.
      
      * Scan files for gfp and slab usages and update includes such that
        only the necessary includes are there.  ie. if only gfp is used,
        gfp.h, if slab is used, slab.h.
      
      * When the script inserts a new include, it looks at the include
        blocks and try to put the new include such that its order conforms
        to its surrounding.  It's put in the include block which contains
        core kernel includes, in the same order that the rest are ordered -
        alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
        doesn't seem to be any matching order.
      
      * If the script can't find a place to put a new include (mostly
        because the file doesn't have fitting include block), it prints out
        an error message indicating which .h file needs to be added to the
        file.
      
      The conversion was done in the following steps.
      
      1. The initial automatic conversion of all .c files updated slightly
         over 4000 files, deleting around 700 includes and adding ~480 gfp.h
         and ~3000 slab.h inclusions.  The script emitted errors for ~400
         files.
      
      2. Each error was manually checked.  Some didn't need the inclusion,
         some needed manual addition while adding it to implementation .h or
         embedding .c file was more appropriate for others.  This step added
         inclusions to around 150 files.
      
      3. The script was run again and the output was compared to the edits
         from #2 to make sure no file was left behind.
      
      4. Several build tests were done and a couple of problems were fixed.
         e.g. lib/decompress_*.c used malloc/free() wrappers around slab
         APIs requiring slab.h to be added manually.
      
      5. The script was run on all .h files but without automatically
         editing them as sprinkling gfp.h and slab.h inclusions around .h
         files could easily lead to inclusion dependency hell.  Most gfp.h
         inclusion directives were ignored as stuff from gfp.h was usually
         wildly available and often used in preprocessor macros.  Each
         slab.h inclusion directive was examined and added manually as
         necessary.
      
      6. percpu.h was updated not to include slab.h.
      
      7. Build test were done on the following configurations and failures
         were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
         distributed build env didn't work with gcov compiles) and a few
         more options had to be turned off depending on archs to make things
         build (like ipr on powerpc/64 which failed due to missing writeq).
      
         * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
         * powerpc and powerpc64 SMP allmodconfig
         * sparc and sparc64 SMP allmodconfig
         * ia64 SMP allmodconfig
         * s390 SMP allmodconfig
         * alpha SMP allmodconfig
         * um on x86_64 SMP allmodconfig
      
      8. percpu.h modifications were reverted so that it could be applied as
         a separate patch and serve as bisection point.
      
      Given the fact that I had only a couple of failures from tests on step
      6, I'm fairly confident about the coverage of this conversion patch.
      If there is a breakage, it's likely to be something in one of the arch
      headers which should be easily discoverable easily on most builds of
      the specific arch.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Guess-its-ok-by: default avatarChristoph Lameter <cl@linux-foundation.org>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
      5a0e3ad6
  11. 14 Dec, 2009 1 commit
  12. 01 Dec, 2009 1 commit
  13. 30 Jan, 2009 1 commit
  14. 12 Jan, 2009 2 commits
  15. 31 Dec, 2008 1 commit
  16. 13 Dec, 2008 1 commit
  17. 05 Jun, 2008 1 commit
    • Max Krasnyansky's avatar
      genirq: Expose default irq affinity mask (take 3) · 18404756
      Max Krasnyansky authored
      Current IRQ affinity interface does not provide a way to set affinity
      for the IRQs that will be allocated/activated in the future.
      This patch creates /proc/irq/default_smp_affinity that lets users set
      default affinity mask for the newly allocated IRQs. Changing the default
      does not affect affinity masks for the currently active IRQs, they
      have to be changed explicitly.
      
      Updated based on Paul J's comments and added some more documentation.
      Signed-off-by: default avatarMax Krasnyansky <maxk@qualcomm.com>
      Cc: pj@sgi.com
      Cc: a.p.zijlstra@chello.nl
      Cc: tglx@linutronix.de
      Cc: rdunlap@xenotime.net
      Cc: mingo@elte.hu
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      18404756
  18. 08 Oct, 2006 1 commit
  19. 07 Oct, 2006 1 commit
  20. 02 Jul, 2006 1 commit
  21. 30 Jun, 2006 1 commit
  22. 29 Jun, 2006 2 commits
    • Ingo Molnar's avatar
      [PATCH] genirq: cleanup: merge irq_affinity[] into irq_desc[] · a53da52f
      Ingo Molnar authored
      Consolidation: remove the irq_affinity[NR_IRQS] array and move it into the
      irq_desc[NR_IRQS].affinity field.
      
      [akpm@osdl.org: sparc64 build fix]
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      a53da52f
    • Ingo Molnar's avatar
      [PATCH] genirq: rename desc->handler to desc->chip · d1bef4ed
      Ingo Molnar authored
      This patch-queue improves the generic IRQ layer to be truly generic, by adding
      various abstractions and features to it, without impacting existing
      functionality.
      
      While the queue can be best described as "fix and improve everything in the
      generic IRQ layer that we could think of", and thus it consists of many
      smaller features and lots of cleanups, the one feature that stands out most is
      the new 'irq chip' abstraction.
      
      The irq-chip abstraction is about describing and coding and IRQ controller
      driver by mapping its raw hardware capabilities [and quirks, if needed] in a
      straightforward way, without having to think about "IRQ flow"
      (level/edge/etc.) type of details.
      
      This stands in contrast with the current 'irq-type' model of genirq
      architectures, which 'mixes' raw hardware capabilities with 'flow' details.
      The patchset supports both types of irq controller designs at once, and
      converts i386 and x86_64 to the new irq-chip design.
      
      As a bonus side-effect of the irq-chip approach, chained interrupt controllers
      (master/slave PIC constructs, etc.) are now supported by design as well.
      
      The end result of this patchset intends to be simpler architecture-level code
      and more consolidation between architectures.
      
      We reused many bits of code and many concepts from Russell King's ARM IRQ
      layer, the merging of which was one of the motivations for this patchset.
      
      This patch:
      
      rename desc->handler to desc->chip.
      
      Originally i did not want to do this, because it's a big patch.  But having
      both "desc->handler", "desc->handle_irq" and "action->handler" caused a
      large degree of confusion and made the code appear alot less clean than it
      truly is.
      
      I have also attempted a dual approach as well by introducing a
      desc->chip alias - but that just wasnt robust enough and broke
      frequently.
      
      So lets get over with this quickly.  The conversion was done automatically
      via scripts and converts all the code in the kernel.
      
      This renaming patch is the first one amongst the patches, so that the
      remaining patches can stay flexible and can be merged and split up
      without having some big monolithic patch act as a merge barrier.
      
      [akpm@osdl.org: build fix]
      [akpm@osdl.org: another build fix]
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      d1bef4ed
  23. 10 Mar, 2006 1 commit
  24. 01 Feb, 2006 1 commit
  25. 06 Jan, 2006 1 commit
  26. 16 Apr, 2005 1 commit
    • Linus Torvalds's avatar
      Linux-2.6.12-rc2 · 1da177e4
      Linus Torvalds authored
      Initial git repository build. I'm not bothering with the full history,
      even though we have it. We can create a separate "historical" git
      archive of that later if we want to, and in the meantime it's about
      3.2GB when imported into git - space that would just make the early
      git days unnecessarily complicated, when we don't have a lot of good
      infrastructure for it.
      
      Let it rip!
      1da177e4