[PATCH] x86-64: Make x86_64 udelay() round up instead of down.
authorPaolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Thu, 7 Dec 2006 01:14:07 +0000 (02:14 +0100)
committerAndi Kleen <andi@basil.nowhere.org>
Thu, 7 Dec 2006 01:14:07 +0000 (02:14 +0100)
commitb9a8d94a47f8a41766f6f7944adfb1d641349903
tree906fa09322f59c60132ff898e212f49a7d9a555e
parentbff6547bb6a4e82c399d74e7fba78b12d2f162ed
[PATCH] x86-64: Make x86_64 udelay() round up instead of down.

Port two patches from i386 to x86_64 delay.c to make sure all rounding is done
upward instead of downward.

There is no sign in commit messages that the mismatch was done on purpose, and
"delay() guarantees sleeping at least for the specified time" is still a valid
rule IMHO.

The original x86 patches are both from pre-GIT era, i.e.:

"[PATCH] round up  in __udelay()" in commit
54c7e1f5cc6771ff644d7bc21a2b829308bd126f

"[PATCH] add 1 in __const_udelay()" in commit
42c77a9801b8877d8b90f65f75db758822a0bccc

(both commits are from converted BK repository to x86_64).

AK: fixed gcc warning

linux/arch/x86_64/lib/delay.c:43: warning: suggest parentheses around + or - inside shift
(did this actually work?)

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andi Kleen <ak@suse.de>
arch/x86_64/lib/delay.c
include/asm-x86_64/delay.h