Eric Lee / smarc-fsl-linux-kernel

07 Dec, 2007

1 commit

18 Oct, 2007

1 commit

  • efb80e7e0   [PARISC] import necessary bits of libgcc.a ... Browse Code »

    Currently we're hacking libs-y to include libgcc.a, but this has
    unforeseen consequences since the userspace libgcc is linked with fpregs
    enabled. We need the kernel to stop using fpregs in an uncontrolled manner
    to implement lazy fpu state saves.

    Signed-off-by: Kyle McMartin

    Kyle McMartin
     

11 Sep, 2005

1 commit

  • fb1c8f93d   [PATCH] spinlock consolidation ... Browse Code »

    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

    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"

    ia64 fix

    Signed-off-by: Ingo Molnar
    Signed-off-by: Arjan van de Ven
    Signed-off-by: Grant Grundler
    Cc: Matthew Wilcox
    Signed-off-by: Hirokazu Takata
    Signed-off-by: Mikael Pettersson
    Signed-off-by: Benoit Boissinot
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Ingo Molnar
     

17 Apr, 2005

1 commit

  • 1da177e4c   Linux-2.6.12-rc2 ... Browse Code »

    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!

    Linus Torvalds