Eric Lee / smarc-fsl-linux-kernel

03 Feb, 2008

1 commit

01 Feb, 2008

1 commit

  • e30ec4525   [MIPS] Split the micro-assembler from tlbex.c. ... Browse Code »

    This patch moves the micro-assembler in a separate implementation, as
    it is useful for further run-time optimizations. The only change in
    behaviour is cutting down printk noise at kernel startup time.

    Checkpatch complains about macro parameters which aren't protected by
    parentheses. I believe this is a flaw in checkpatch, the paste operator
    used in those macros won't work with parenthesised parameters.

    Signed-off-by: Thiemo Seufer
    Signed-off-by: Ralf Baechle

    Thiemo Seufer
     

29 Jan, 2008

11 commits

12 Jan, 2008

1 commit

27 Nov, 2007

1 commit

  • cce335ae4   [MIPS] 64-bit Sibyte kernels need DMA32. ... Browse Code »

    Sibyte SOCs only have 32-bit PCI. Due to the sparse use of the address
    space only the first 1GB of memory is mapped at physical addresses
    below 1GB. If a system has more than 1GB of memory 32-bit DMA will
    not be able to reach all of it.

    For now this patch is good enough to keep Sibyte users happy but it seems
    eventually something like swiotlb will be needed for Sibyte.

    Signed-off-by: Ralf Baechle

    Ralf Baechle
     

16 Nov, 2007

3 commits

30 Oct, 2007

3 commits

  • a76ab5c10   [MIPS] MT: Fix bug in multithreaded kernels. ... Browse Code »

    When GDB writes a breakpoint into address area of inferior process the
    kernel needs to invalidate the modified memory in the inferior which
    is done by calling flush_cache_page which in turns calls
    r4k_flush_cache_page and local_r4k_flush_cache_page for VSMP or SMTC
    kernel via r4k_on_each_cpu().

    As the VSMP and SMTC SMP kernels for 34K are running on a single shared
    caches it is possible to get away without interprocessor function calls.
    This optimization is implemented in r4k_on_each_cpu, so
    local_r4k_flush_cache_page is only ever called on the local CPU.

    This is where the following code in local_r4k_flush_cache_page() strikes:

    /*
    * If ownes no valid ASID yet, cannot possibly have gotten
    * this page into the cache.
    */
    if (cpu_context(smp_processor_id(), mm) == 0)
    return;

    On VSMP and SMTC had a function of cpu_context() for each CPU(TC).

    So in case another CPU than the CPU executing local_r4k_cache_flush_page
    has not accessed the mm but one of the other CPUs has there may be data
    to be flushed in the cache yet local_r4k_cache_flush_page will falsely
    return leaving the I-cache inconsistent for the breakpoint.

    While the issue was discovered with GDB it also exists in
    local_r4k_flush_cache_range() and local_r4k_flush_cache().

    Fixed by introducing a new function has_valid_asid which on MT kernels
    returns true if a mm is active on any processor in the system.

    This is relativly expensive since for memory acccesses in that loop
    cache misses have to be assumed but it seems the most viable solution
    for 2.6.23 and older -stable kernels.

    Signed-off-by: Ralf Baechle

    Ralf Baechle
     
  • 21b2aecaa   [MIPS] c-r3k: Implement flush_cache_range() ... Browse Code »

    Contrary to the belief of some, the R3000 and related processors did have
    caches, both a data and an instruction cache. Here is an implementation
    of r3k_flush_cache_page(), which is the processor-specific back-end for
    flush_cache_range(), done according to the spec in
    Documentation/cachetlb.txt.

    While at it, remove an unused local function: get_phys_page(), do some
    trivial formatting fixes and modernise debugging facilities.

    Signed-off-by: Maciej W. Rozycki
    Signed-off-by: Ralf Baechle

    Maciej W. Rozycki
     
  • 6e86b0bf0   [MIPS] Cleanup random difference between the lmo and kernel.org tree. ... Browse Code »

    Signed-off-by: Ralf Baechle

    Ralf Baechle
     

23 Oct, 2007

2 commits

20 Oct, 2007

1 commit

  • b460cbc58   pid namespaces: define is_global_init() and is_container_init() ... Browse Code »

    is_init() is an ambiguous name for the pid==1 check. Split it into
    is_global_init() and is_container_init().

    A cgroup init has it's tsk->pid == 1.

    A global init also has it's tsk->pid == 1 and it's active pid namespace
    is the init_pid_ns. But rather than check the active pid namespace,
    compare the task structure with 'init_pid_ns.child_reaper', which is
    initialized during boot to the /sbin/init process and never changes.

    Changelog:

    2.6.22-rc4-mm2-pidns1:
    - Use 'init_pid_ns.child_reaper' to determine if a given task is the
    global init (/sbin/init) process. This would improve performance
    and remove dependence on the task_pid().

    2.6.21-mm2-pidns2:

    - [Sukadev Bhattiprolu] Changed is_container_init() calls in {powerpc,
    ppc,avr32}/traps.c for the _exception() call to is_global_init().
    This way, we kill only the cgroup if the cgroup's init has a
    bug rather than force a kernel panic.

    [akpm@linux-foundation.org: fix comment]
    [sukadev@us.ibm.com: Use is_global_init() in arch/m32r/mm/fault.c]
    [bunk@stusta.de: kernel/pid.c: remove unused exports]
    [sukadev@us.ibm.com: Fix capability.c to work with threaded init]
    Signed-off-by: Serge E. Hallyn
    Signed-off-by: Sukadev Bhattiprolu
    Acked-by: Pavel Emelianov
    Cc: Eric W. Biederman
    Cc: Cedric Le Goater
    Cc: Dave Hansen
    Cc: Herbert Poetzel
    Cc: Kirill Korotaev
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Serge E. Hallyn
     

17 Oct, 2007

5 commits

  • 622a9edd9   Remove dma_cache_(wback|inv|wback_inv) functions ... Browse Code »

    dma_cache_(wback|inv|wback_inv) were the earliest attempt on a generalized
    cache managment API for I/O purposes. Originally it was basically the raw
    MIPS low level cache API exported to the entire world. The API has
    suffered from a lack of documentation, was not very widely used unlike it's
    more modern brothers and can easily be replaced by dma_cache_sync. So
    remove it rsp. turn the surviving bits back into an arch private API, as
    discussed on linux-arch.

    Signed-off-by: Ralf Baechle
    Acked-by: Paul Mundt
    Acked-by: Paul Mackerras
    Acked-by: David S. Miller
    Acked-by: Kyle McMartin
    Acked-by: Haavard Skinnemoen
    Cc:
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Ralf Baechle
     
  • ebc283118   Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus ... Browse Code »

    * 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
    [MIPS] Increase cp0 compare clockevent min_delta_ns from 0x30 to 0x300.
    [MIPS] Cache: Provide more information on cache policy on bootup.
    [MIPS] Fix aliasing bug in copy_user_highpage, take 2.
    [MIPS] VPE loader: convert from struct class_ device to struct device
    [MIPS] MIPSsim: Fix booting from NFS root
    [MIPS] Alchemy: Get rid of au1xxx_irq_map_t.
    [MIPS] Alchemy: Get rid of au_ffz().
    [MIPS] Alchemy: Get rid of au_ffs().
    [MIPS] Alchemy: cleanup interrupt code.
    [MIPS] Lasat: Fix build by conversion to irq_cpu.c.
    [MIPS] Lasat: Add #ifndef ... #endif include warpper to lasatint.h.
    [MIPS] IP22: Enable -Werror.
    [MIPS] IP22: Fix warning.
    [MIPS] IP22: Complain if requesting the front panel irq failed.
    [MIPS] vmlinux.lds.S: Handle KPROBES_TEXT.
    [MIPS] vmlinux.lds.S: Fix handling of .notes in final link.
    [MIPS] vmlinux.lds.S: Remove duplicate comment.
    [MIPS] MSP71XX: Add workarounds file.
    [MIPS] IP32: Fix build by conversion to irq_cpu.c.

    Linus Torvalds
     
  • 64bfca5cd   [MIPS] Cache: Provide more information on cache policy on bootup. ... Browse Code »

    This should help making bug reports for the gadzillion of cores with all
    their configuration and synthesis options more useful.

    Signed-off-by: Ralf Baechle

    Ralf Baechle
     
  • 985c30ef4   [MIPS] Fix aliasing bug in copy_user_highpage, take 2. ... Browse Code »

    Turns out b868868ae0f7272228c95cc760338ffe35bb739d wasn't quite right.
    When called for a page that isn't marked dirty it would artificially
    create an alias instead of doing the obvious thing and access the page
    via KSEG0.

    The same issue also exists in copy_to_user_page and copy_from_user_page
    which was causing the machine to die under rare circumstances for example
    when running ps if the BUG_ON() assertion added by the earlier fix was
    getting triggered.

    Signed-off-by: Ralf Baechle

    Ralf Baechle
     
  • dcca2bde4   During VM oom condition, kill all threads in process group ... Browse Code »

    We have had complaints where a threaded application is left in a bad state
    after one of it's threads is killed when we hit a VM: out_of_memory
    condition.

    Killing just one of the process threads can leave the application in a bad
    state, whereas killing the entire process group would allow for the
    application to restart, or be otherwise handled, and makes it very obvious
    that something has gone wrong.

    This change allows the entire process group to be taken down, rather
    than just the one thread.

    Signed-off-by: Will Schmidt
    Cc: Richard Henderson
    Cc: Ivan Kokshaysky
    Cc: Russell King
    Cc: Ian Molton
    Cc: Haavard Skinnemoen
    Cc: Mikael Starvik
    Cc: David Howells
    Cc: Andi Kleen
    Cc: "Luck, Tony"
    Cc: Hirokazu Takata
    Cc: Geert Uytterhoeven
    Cc: Roman Zippel
    Cc: Ralf Baechle
    Cc: Kyle McMartin
    Cc: Matthew Wilcox
    Cc: Paul Mackerras
    Cc: Benjamin Herrenschmidt
    Cc: Heiko Carstens
    Cc: Martin Schwidefsky
    Cc: Paul Mundt
    Cc: Kazumoto Kojima
    Cc: Richard Curnow
    Cc: William Lee Irwin III
    Cc: "David S. Miller"
    Cc: Chris Zankel
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Will Schmidt
     

13 Oct, 2007

1 commit

12 Oct, 2007

9 commits

03 Oct, 2007

1 commit