gpu: drm: dead code elimination
Pan Zhang authored

this set adds support for removal of gpu drm dead code.

patch3 is similar with patch 1:
`num` is a data of u8 type and ATOM_MAX_HW_I2C_READ == 255,

so there is a impossible condition '(num > 255) => (0-255 > 255)'.
Signed-off-by: default avatarPan Zhang <zhangpan26@huawei.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
d012ea92
Linux kernel
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