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authorPaolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>2007-04-02 02:49:37 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-04-02 13:06:08 -0400
commit10fa1155a2c3282f421a74fedfad1957e8bdc86c (patch)
tree21ec69d27c0d5e239f9c0eed531dbcdc0f602af2 /arch/um/sys-i386
parent05565b65a5309e3e5c86db1975b57f75661bee8f (diff)
[PATCH] uml: fix unreasonably long udelay
Currently we have a confused udelay implementation. * __const_udelay does not accept usecs but xloops in i386 and x86_64 * our implementation requires usecs as arg * it gets a xloops count when called by asm/arch/delay.h Bugs related to this (extremely long shutdown times) where reported by some x86_64 users, especially using Device Mapper. To hit this bug, a compile-time constant time parameter must be passed - that's why UML seems to work most times. Fix this with a simple udelay implementation. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Acked-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/um/sys-i386')
-rw-r--r--arch/um/sys-i386/delay.c11
1 files changed, 0 insertions, 11 deletions
diff --git a/arch/um/sys-i386/delay.c b/arch/um/sys-i386/delay.c
index 2c11b9770e8b..d623e074f41d 100644
--- a/arch/um/sys-i386/delay.c
+++ b/arch/um/sys-i386/delay.c
@@ -27,14 +27,3 @@ void __udelay(unsigned long usecs)
27} 27}
28 28
29EXPORT_SYMBOL(__udelay); 29EXPORT_SYMBOL(__udelay);
30
31void __const_udelay(unsigned long usecs)
32{
33 int i, n;
34
35 n = (loops_per_jiffy * HZ * usecs) / MILLION;
36 for(i=0;i<n;i++)
37 cpu_relax();
38}
39
40EXPORT_SYMBOL(__const_udelay);