1. 10 May, 2007 2 commits
    • Kumar Gala's avatar
      [POWERPC] User rheap from arch/powerpc/lib · b99ab6a8
      Kumar Gala authored
      Removed rheap in arch/ppc/lib and changed build system to use the
      one in arch/powerpc/lib.
      Signed-off-by: default avatarKumar Gala <galak@kernel.crashing.org>
      b99ab6a8
    • Timur Tabi's avatar
      [POWERPC] Change rheap functions to use ulongs instead of pointers · 4c35630c
      Timur Tabi authored
      The rheap allocation functions return a pointer, but the actual value is based
      on how the heap was initialized, and so it can be anything, e.g. an offset
      into a buffer.  A ulong is a better representation of the value returned by
      the allocation functions.
      
      This patch changes all of the relevant rheap functions to use a unsigned long
      integers instead of a pointer.  In case of an error, the value returned is
      a negative error code that has been cast to an unsigned long.  The caller can
      use the IS_ERR_VALUE() macro to check for this.
      
      All code which calls the rheap functions is updated accordingly.  Macros
      IS_MURAM_ERR() and IS_DPERR(), have been deleted in favor of IS_ERR_VALUE().
      
      Also added error checking to rh_attach_region().
      Signed-off-by: default avatarTimur Tabi <timur@freescale.com>
      Signed-off-by: default avatarKumar Gala <galak@kernel.crashing.org>
      4c35630c
  2. 26 Apr, 2007 1 commit
  3. 08 Feb, 2007 1 commit
  4. 30 Jun, 2006 1 commit
  5. 28 Mar, 2006 2 commits
  6. 10 Feb, 2006 1 commit
  7. 17 Oct, 2005 1 commit
  8. 15 Sep, 2005 1 commit
    • David S. Miller's avatar
      [LIB]: Consolidate _atomic_dec_and_lock() · 4db2ce01
      David S. Miller authored
      Several implementations were essentialy a common piece of C code using
      the cmpxchg() macro.  Put the implementation in one spot that everyone
      can share, and convert sparc64 over to using this.
      
      Alpha is the lone arch-specific implementation, which codes up a
      special fast path for the common case in order to avoid GP reloading
      which a pure C version would require.
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      4db2ce01
  9. 10 Sep, 2005 1 commit
    • Ingo Molnar's avatar
      [PATCH] spinlock consolidation · fb1c8f93
      Ingo Molnar authored
      This patch (written by me and also containing many suggestions of Arjan van
      de Ven) does a major cleanup of the spinlock code.  It does the following
      things:
      
       - consolidates and enhances the spinlock/rwlock debugging code
      
       - simplifies the asm/spinlock.h files
      
       - encapsulates the raw spinlock type and moves generic spinlock
         features (such as ->break_lock) into the generic code.
      
       - cleans up the spinlock code hierarchy to get rid of the spaghetti.
      
      Most notably there's now only a single variant of the debugging code,
      located in lib/spinlock_debug.c.  (previously we had one SMP debugging
      variant per architecture, plus a separate generic one for UP builds)
      
      Also, i've enhanced the rwlock debugging facility, it will now track
      write-owners.  There is new spinlock-owner/CPU-tracking on SMP builds too.
      All locks have lockup detection now, which will work for both soft and hard
      spin/rwlock lockups.
      
      The arch-level include files now only contain the minimally necessary
      subset of the spinlock code - all the rest that can be generalized now
      lives in the generic headers:
      
       include/asm-i386/spinlock_types.h       |   16
       include/asm-x86_64/spinlock_types.h     |   16
      
      I have also split up the various spinlock variants into separate files,
      making it easier to see which does what. The new layout is:
      
         SMP                         |  UP
         ----------------------------|-----------------------------------
         asm/spinlock_types_smp.h    |  linux/spinlock_types_up.h
         linux/spinlock_types.h      |  linux/spinlock_types.h
         asm/spinlock_smp.h          |  linux/spinlock_up.h
         linux/spinlock_api_smp.h    |  linux/spinlock_api_up.h
         linux/spinlock.h            |  linux/spinlock.h
      
      /*
       * here's the role of the various spinlock/rwlock related include files:
       *
       * on SMP builds:
       *
       *  asm/spinlock_types.h: contains the raw_spinlock_t/raw_rwlock_t and the
       *                        initializers
       *
       *  linux/spinlock_types.h:
       *                        defines the generic type and initializers
       *
       *  asm/spinlock.h:       contains the __raw_spin_*()/etc. lowlevel
       *                        implementations, mostly inline assembly code
       *
       *   (also included on UP-debug builds:)
       *
       *  linux/spinlock_api_smp.h:
       *                        contains the prototypes for the _spin_*() APIs.
       *
       *  linux/spinlock.h:     builds the final spin_*() APIs.
       *
       * on UP builds:
       *
       *  linux/spinlock_type_up.h:
       *                        contains the generic, simplified UP spinlock type.
       *                        (which is an empty structure on non-debug builds)
       *
       *  linux/spinlock_types.h:
       *                        defines the generic type and initializers
       *
       *  linux/spinlock_up.h:
       *                        contains the __raw_spin_*()/etc. version of UP
       *                        builds. (which are NOPs on non-debug, non-preempt
       *                        builds)
       *
       *   (included on UP-non-debug builds:)
       *
       *  linux/spinlock_api_up.h:
       *                        builds the _spin_*() APIs.
       *
       *  linux/spinlock.h:     builds the final spin_*() APIs.
       */
      
      All SMP and UP architectures are converted by this patch.
      
      arm, i386, ia64, ppc, ppc64, s390/s390x, x64 was build-tested via
      crosscompilers.  m32r, mips, sh, sparc, have not been tested yet, but should
      be mostly fine.
      
      From: Grant Grundler <grundler@parisc-linux.org>
      
        Booted and lightly tested on a500-44 (64-bit, SMP kernel, dual CPU).
        Builds 32-bit SMP kernel (not booted or tested).  I did not try to build
        non-SMP kernels.  That should be trivial to fix up later if necessary.
      
        I converted bit ops atomic_hash lock to raw_spinlock_t.  Doing so avoids
        some ugly nesting of linux/*.h and asm/*.h files.  Those particular locks
        are well tested and contained entirely inside arch specific code.  I do NOT
        expect any new issues to arise with them.
      
       If someone does ever need to use debug/metrics with them, then they will
        need to unravel this hairball between spinlocks, atomic ops, and bit ops
        that exist only because parisc has exactly one atomic instruction: LDCW
        (load and clear word).
      
      From: "Luck, Tony" <tony.luck@intel.com>
      
         ia64 fix
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      Signed-off-by: default avatarArjan van de Ven <arjanv@infradead.org>
      Signed-off-by: default avatarGrant Grundler <grundler@parisc-linux.org>
      Cc: Matthew Wilcox <willy@debian.org>
      Signed-off-by: default avatarHirokazu Takata <takata@linux-m32r.org>
      Signed-off-by: default avatarMikael Pettersson <mikpe@csd.uu.se>
      Signed-off-by: default avatarBenoit Boissinot <benoit.boissinot@ens-lyon.org>
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      fb1c8f93
  10. 22 Jun, 2005 1 commit
    • Ingo Molnar's avatar
      [PATCH] smp_processor_id() cleanup · 39c715b7
      Ingo Molnar authored
      This patch implements a number of smp_processor_id() cleanup ideas that
      Arjan van de Ven and I came up with.
      
      The previous __smp_processor_id/_smp_processor_id/smp_processor_id API
      spaghetti was hard to follow both on the implementational and on the
      usage side.
      
      Some of the complexity arose from picking wrong names, some of the
      complexity comes from the fact that not all architectures defined
      __smp_processor_id.
      
      In the new code, there are two externally visible symbols:
      
       - smp_processor_id(): debug variant.
      
       - raw_smp_processor_id(): nondebug variant. Replaces all existing
         uses of _smp_processor_id() and __smp_processor_id(). Defined
         by every SMP architecture in include/asm-*/smp.h.
      
      There is one new internal symbol, dependent on DEBUG_PREEMPT:
      
       - debug_smp_processor_id(): internal debug variant, mapped to
                                   smp_processor_id().
      
      Also, i moved debug_smp_processor_id() from lib/kernel_lock.c into a new
      lib/smp_processor_id.c file.  All related comments got updated and/or
      clarified.
      
      I have build/boot tested the following 8 .config combinations on x86:
      
       {SMP,UP} x {PREEMPT,!PREEMPT} x {DEBUG_PREEMPT,!DEBUG_PREEMPT}
      
      I have also build/boot tested x64 on UP/PREEMPT/DEBUG_PREEMPT.  (Other
      architectures are untested, but should work just fine.)
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      Signed-off-by: default avatarArjan van de Ven <arjan@infradead.org>
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      39c715b7
  11. 20 May, 2005 1 commit
  12. 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