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    Subject[PATCH v3 03/10] DMA reservations: use the new mmap locking API
    From
    This use is converted manually ahead of the next patch in the series,
    as it requires including a new header which the automated conversion
    would miss.

    Signed-off-by: Michel Lespinasse <walken@google.com>
    ---
    drivers/dma-buf/dma-resv.c | 5 +++--
    1 file changed, 3 insertions(+), 2 deletions(-)

    diff --git a/drivers/dma-buf/dma-resv.c b/drivers/dma-buf/dma-resv.c
    index 4264e64788c4..b45f8514dc82 100644
    --- a/drivers/dma-buf/dma-resv.c
    +++ b/drivers/dma-buf/dma-resv.c
    @@ -34,6 +34,7 @@

    #include <linux/dma-resv.h>
    #include <linux/export.h>
    +#include <linux/mm.h>
    #include <linux/sched/mm.h>

    /**
    @@ -109,7 +110,7 @@ static int __init dma_resv_lockdep(void)

    dma_resv_init(&obj);

    - down_read(&mm->mmap_sem);
    + mmap_read_lock(mm);
    ww_acquire_init(&ctx, &reservation_ww_class);
    ret = dma_resv_lock(&obj, &ctx);
    if (ret == -EDEADLK)
    @@ -118,7 +119,7 @@ static int __init dma_resv_lockdep(void)
    fs_reclaim_release(GFP_KERNEL);
    ww_mutex_unlock(&obj.lock);
    ww_acquire_fini(&ctx);
    - up_read(&mm->mmap_sem);
    + mmap_read_unlock(mm);

    mmput(mm);

    --
    2.26.0.rc2.310.g2932bb562d-goog
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