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    Subject[PATCH 205/270] Staging: android: binder: Allow using highmem for binder buffers
    Date
    3.5.7u1 -stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: =?UTF-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= <arve@android.com>

    commit 585650dcec88e704a19bb226a34b6a7166111623 upstream.

    The default kernel mapping for the pages allocated for the binder
    buffers is never used. Set the __GFP_HIGHMEM flag when allocating
    these pages so we don't needlessly use low memory pages that may
    be required elsewhere.

    Signed-off-by: Arve Hjønnevåg <arve@android.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com>
    ---
    drivers/staging/android/binder.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/drivers/staging/android/binder.c b/drivers/staging/android/binder.c
    index 80acd0e..223639a 100644
    --- a/drivers/staging/android/binder.c
    +++ b/drivers/staging/android/binder.c
    @@ -655,7 +655,7 @@ static int binder_update_page_range(struct binder_proc *proc, int allocate,
    page = &proc->pages[(page_addr - proc->buffer) / PAGE_SIZE];

    BUG_ON(*page);
    - *page = alloc_page(GFP_KERNEL | __GFP_ZERO);
    + *page = alloc_page(GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO);
    if (*page == NULL) {
    printk(KERN_ERR "binder: %d: binder_alloc_buf failed "
    "for page at %p\n", proc->pid, page_addr);
    --
    1.7.9.5
    --
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