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authorZachary Amsden <zach@vmware.com>2007-03-05 00:30:38 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-03-05 07:57:52 -0800
commiteda08b1befaabcdfea1a9216ae13f9065e69baa7 (patch)
treed70d13c90e540357962ae5d15a7aecc5c8b0f3fa /include/asm-i386/paravirt.h
parent9a1c13e91f100c12dcad3a1be1b12890bf32f6ff (diff)
downloadop-kernel-dev-eda08b1befaabcdfea1a9216ae13f9065e69baa7.zip
op-kernel-dev-eda08b1befaabcdfea1a9216ae13f9065e69baa7.tar.gz
[PATCH] vmi: paravirt drop udelay op
Not respecting udelay causes problems with any virtual hardware that is passed through to real hardware. This can be noticed by any device that interacts with the real world in real time - like AP startup, which takes real time. Or keyboard LEDs, which should blink in real-time. Or floppy drives, but only when passed through to a real floppy controller on OSes which can't sufficiently buffer the floppy commands to emulate a zero latency floppy. Or IDE drives, when connecting to a physical CDROM. This was mostly a hack to get the kernel to boot faster, but it introduced a number of misvirtualization bugs, and Alan and Pavel argued pretty strongly against it. We were the only client, and now want to clean up this cruft. Signed-off-by: Zachary Amsden <zach@vmware.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-i386/paravirt.h')
-rw-r--r--include/asm-i386/paravirt.h1
1 files changed, 0 insertions, 1 deletions
diff --git a/include/asm-i386/paravirt.h b/include/asm-i386/paravirt.h
index e01d895..1e4226a 100644
--- a/include/asm-i386/paravirt.h
+++ b/include/asm-i386/paravirt.h
@@ -117,7 +117,6 @@ struct paravirt_ops
void (*set_iopl_mask)(unsigned mask);
void (*io_delay)(void);
- void (*const_udelay)(unsigned long loops);
#ifdef CONFIG_X86_LOCAL_APIC
void (*apic_write)(unsigned long reg, unsigned long v);
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