On Fri, 21 Aug 2020 08:39:45 +0000 David Laight <david.lai...@aculab.com> wrote:
> From: Yue Hu > > Sent: 21 August 2020 03:44 > > > > From: Yue Hu <huy...@yulong.com> > > > > We observed warning about kzalloc() when register thermal cooling device > > in backlight_device_register(). backlight display can be a cooling device > > since reducing screen brightness will can help reduce temperature. > > > > However, ->get_max_state of backlight will assign max brightness of 1024 > > to states. The memory size can be getting 1MB+ due to states * states. > > That is so large to trigger kmalloc() warning. > > I can't help feeling that there is an 'adequate' implementation > that doesn't require anywhere near 1MB of memory. However, it should be a potential issue due to what i described above, rt? Thx. > > David > > - > Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 > 1PT, UK > Registration No: 1397386 (Wales) >