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In linux/input.h each section's (e.g. ABS) FOO_MAX is the maximum FOO value. Recent kernels define FOO_CNT as the maximum number of FOO there will ever be. Hence using FOO_MAX to size the bit vectors representing the capabilities of an evdev device is off by one. Define FOO_CNT values for use with Linux kernels which lack them. Use FOO_CNT whenever we need to know the number of bits needed -- usually to calculate the number of longs needed. When iterating over the values FOO_MAX still seems appropriate however the loop test should include FOO_MAX rather than skip it. Signed-off-by: Matt Helsley <matt.helsley@gmail.com> Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>