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ARM: udelay: prevent math rounding resulting in short udelays
authorRussell King <rmk+kernel@arm.linux.org.uk>
Mon, 10 Jan 2011 23:55:59 +0000 (23:55 +0000)
committerRussell King <rmk+kernel@arm.linux.org.uk>
Mon, 10 Jan 2011 23:55:59 +0000 (23:55 +0000)
commit56949d414acd30353fdba4b64876a0a7953a7b77
tree7fb58dd19c6ab12480cb82f8b8a2b9141da1d905tree | snapshot (tar.gz zip)
parent9e9bc9736756f25d6c47b4eba0ebf25b20a6f153commit | diff
ARM: udelay: prevent math rounding resulting in short udelays

We perform the microseconds to loops calculation using a number of
multiplies and shift rights.  Each shift right rounds down the
resulting value, which can result in delays shorter than requested.
Ensure that we always round up.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
arch/arm/lib/delay.S diff | blob | blame | history