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    Subject[11/14] vcompound: Fallbacks for order 1 stack allocations on IA64 and x86
    This allows fallback for order 1 stack allocations. In the fallback
    scenario the stacks will be virtually mapped.

    Signed-off-by: Christoph Lameter <clameter@sgi.com>
    ---
    include/asm-ia64/thread_info.h | 5 +++--
    include/asm-x86/thread_info_32.h | 6 +++---
    include/asm-x86/thread_info_64.h | 4 ++--
    3 files changed, 8 insertions(+), 7 deletions(-)

    Index: linux-2.6.25-rc5-mm1/include/asm-ia64/thread_info.h
    ===================================================================
    --- linux-2.6.25-rc5-mm1.orig/include/asm-ia64/thread_info.h 2008-03-20 20:03:47.165885870 -0700
    +++ linux-2.6.25-rc5-mm1/include/asm-ia64/thread_info.h 2008-03-20 20:04:51.302135777 -0700
    @@ -82,8 +82,9 @@ struct thread_info {
    #define end_of_stack(p) (unsigned long *)((void *)(p) + IA64_RBS_OFFSET)

    #define __HAVE_ARCH_TASK_STRUCT_ALLOCATOR
    -#define alloc_task_struct() ((struct task_struct *)__get_free_pages(GFP_KERNEL | __GFP_COMP, KERNEL_STACK_SIZE_ORDER))
    -#define free_task_struct(tsk) free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER)
    +#define alloc_task_struct() ((struct task_struct *)__alloc_vcompound( \
    + GFP_KERNEL, KERNEL_STACK_SIZE_ORDER))
    +#define free_task_struct(tsk) __free_vcompound(tsk)

    #define tsk_set_notify_resume(tsk) \
    set_ti_thread_flag(task_thread_info(tsk), TIF_NOTIFY_RESUME)
    Index: linux-2.6.25-rc5-mm1/include/asm-x86/thread_info_32.h
    ===================================================================
    --- linux-2.6.25-rc5-mm1.orig/include/asm-x86/thread_info_32.h 2008-03-20 20:03:47.173885951 -0700
    +++ linux-2.6.25-rc5-mm1/include/asm-x86/thread_info_32.h 2008-03-20 20:04:51.306136067 -0700
    @@ -96,13 +96,13 @@ static inline struct thread_info *curren
    /* thread information allocation */
    #ifdef CONFIG_DEBUG_STACK_USAGE
    #define alloc_thread_info(tsk) ((struct thread_info *) \
    - __get_free_pages(GFP_KERNEL| __GFP_ZERO, get_order(THREAD_SIZE)))
    + __alloc_vcompound(GFP_KERNEL| __GFP_ZERO, get_order(THREAD_SIZE)))
    #else
    #define alloc_thread_info(tsk) ((struct thread_info *) \
    - __get_free_pages(GFP_KERNEL, get_order(THREAD_SIZE)))
    + __alloc_vcompound(GFP_KERNEL, get_order(THREAD_SIZE)))
    #endif

    -#define free_thread_info(info) free_pages((unsigned long)(info), get_order(THREAD_SIZE))
    +#define free_thread_info(info) __free_vcompound(info)

    #else /* !__ASSEMBLY__ */

    Index: linux-2.6.25-rc5-mm1/include/asm-x86/thread_info_64.h
    ===================================================================
    --- linux-2.6.25-rc5-mm1.orig/include/asm-x86/thread_info_64.h 2008-03-20 20:03:47.189886138 -0700
    +++ linux-2.6.25-rc5-mm1/include/asm-x86/thread_info_64.h 2008-03-20 20:04:51.306136067 -0700
    @@ -83,9 +83,9 @@ static inline struct thread_info *stack_
    #endif

    #define alloc_thread_info(tsk) \
    - ((struct thread_info *) __get_free_pages(THREAD_FLAGS, THREAD_ORDER))
    + ((struct thread_info *) __alloc_vcompound(THREAD_FLAGS, THREAD_ORDER))

    -#define free_thread_info(ti) free_pages((unsigned long) (ti), THREAD_ORDER)
    +#define free_thread_info(ti) __free_vcompound(ti)

    #else /* !__ASSEMBLY__ */

    --


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