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    Subject[rfc 04/10] Pageflags: Use proper page flag functions in Xen
    Xen uses bitops to manipulate page flags. Make it use proper page flag
    functions.

    Signed-off-by: Christoph Lameter <clameter@sgi.com>

    ---
    arch/x86/xen/mmu.c | 4 ++--
    include/linux/page-flags.h | 2 +-
    2 files changed, 3 insertions(+), 3 deletions(-)

    Index: linux-2.6/arch/x86/xen/mmu.c
    ===================================================================
    --- linux-2.6.orig/arch/x86/xen/mmu.c 2008-03-03 15:45:09.207335791 -0800
    +++ linux-2.6/arch/x86/xen/mmu.c 2008-03-03 15:48:09.469801962 -0800
    @@ -425,7 +425,7 @@ static void xen_do_pin(unsigned level, u

    static int pin_page(struct page *page, enum pt_level level)
    {
    - unsigned pgfl = test_and_set_bit(PG_pinned, &page->flags);
    + unsigned pgfl = TestSetPagePinned(page);
    int flush;

    if (pgfl)
    @@ -506,7 +506,7 @@ void __init xen_mark_init_mm_pinned(void

    static int unpin_page(struct page *page, enum pt_level level)
    {
    - unsigned pgfl = test_and_clear_bit(PG_pinned, &page->flags);
    + unsigned pgfl = TestClearPagePinned(page);

    if (pgfl && !PageHighMem(page)) {
    void *pt = lowmem_page_address(page);
    Index: linux-2.6/include/linux/page-flags.h
    ===================================================================
    --- linux-2.6.orig/include/linux/page-flags.h 2008-03-03 15:46:15.848254180 -0800
    +++ linux-2.6/include/linux/page-flags.h 2008-03-03 15:48:09.469801962 -0800
    @@ -155,7 +155,7 @@ PAGEFLAG(LRU, lru) __CLEARPAGEFLAG(LRU,
    PAGEFLAG(Active, active) __CLEARPAGEFLAG(Active, active)
    __PAGEFLAG(Slab, slab)
    PAGEFLAG(Checked, checked) /* Used by some filesystems */
    -PAGEFLAG(Pinned, pinned) /* Xen pinned pagetable */
    +PAGEFLAG(Pinned, pinned) TESTSCFLAG(Pinned, pinned) /* Xen pagetable */
    PAGEFLAG(Reserved, reserved) __CLEARPAGEFLAG(Reserved, reserved)
    PAGEFLAG(Private, private) __CLEARPAGEFLAG(Private, private)
    __SETPAGEFLAG(Private, private)
    --


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