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    drm/ttm: optimize bo_kmap_type values · a0724fcf
    Pekka Paalanen 提交于
    A micro-optimization on the function ttm_kmap_obj_virtual().
    
    By defining the values of enum ttm_bo_kmap_obj::bo_kmap_type to have a
    bit indicating iomem, size of the function ttm_kmap_obj_virtual() will be
    reduced by 16 bytes on x86_64 (gcc 4.1.2).
    
    ttm_kmap_obj_virtual() may be heavily used, when buffer objects are
    accessed via wrappers, that work for both kinds of memory addresses:
    iomem cookies and kernel virtual.
    Signed-off-by: NPekka Paalanen <pq@iki.fi>
    Signed-off-by: NDave Airlie <airlied@redhat.com>
    a0724fcf
ttm_bo_api.h 19.8 KB