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    Subject[PATCH] drm: tegra: shut up harmless warning on NOMMU
    Date
    The tegra DRM driver is almost ok without an MMU, but there
    is one small warning that I get:

    drivers/gpu/drm/tegra/gem.c: In function 'tegra_drm_mmap':
    drivers/gpu/drm/tegra/gem.c:508:12: unused variable 'prot'

    This marks the variable as __maybe_unused instead.

    Signed-off-by: Arnd Bergmann <arnd@arndb.de>
    ---
    drivers/gpu/drm/tegra/gem.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/drivers/gpu/drm/tegra/gem.c b/drivers/gpu/drm/tegra/gem.c
    index 7d853e6b5ff0..63f14b7a59a0 100644
    --- a/drivers/gpu/drm/tegra/gem.c
    +++ b/drivers/gpu/drm/tegra/gem.c
    @@ -505,7 +505,7 @@ int tegra_drm_mmap(struct file *file, struct vm_area_struct *vma)

    vma->vm_pgoff = vm_pgoff;
    } else {
    - pgprot_t prot = vm_get_page_prot(vma->vm_flags);
    + pgprot_t prot __maybe_unused = vm_get_page_prot(vma->vm_flags);

    vma->vm_flags |= VM_MIXEDMAP;
    vma->vm_flags &= ~VM_PFNMAP;
    --
    2.9.0
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