mirror of
https://github.com/torvalds/linux.git
synced 2026-10-07 05:31:08 -04:00
Russell King
57ca654bef
We have recently had an example of someone wanting to use a 90kHz timer for the software delay loop. udelay() needs to have at least microsecond resolution to allow drivers access to a delay mechanism with a reasonable chance of delaying the period they requested within at least a 50% marging of error, especially for small delays. Discussion about the udelay() accuracy can be found at: https://lkml.org/lkml/2011/1/9/37 Reject timers which are unable to supply this level of resolution. Acked-by: Nicolas Pitre <[email protected]> Signed-off-by: Russell King <[email protected]>