[PATCH] i386: PARAVIRT: Use patch site IDs computed from offset in paravirt_ops structure

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Use patch type identifiers derived from the offset of the operation in
the paravirt_ops structure.  This avoids having to maintain a separate
enum for patch site types.

Also, since the identifier is derived from the offset into
paravirt_ops, the offset can be derived from the identifier.  This is
used to remove replicated information in the various callsite macros,
which has been a source of bugs in the past.

This patch also drops the fused save_fl+cli operation, which doesn't
really add much and makes things more complex - specifically because
it breaks the 1:1 relationship between identifiers and offsets.  If
this operation turns out to be particularly beneficial, then the right
answer is to define a new entrypoint for it.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Zachary Amsden <zach@vmware.com>

...

This commit is contained in:

Jeremy Fitzhardinge 2007-05-02 19:27:14 +02:00 • committed by Andi Kleen

parent 98de032b68

commit d582203578

3 changed files with 104 additions and 126 deletions

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14

arch/i386/kernel/paravirt.c

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39

arch/i386/kernel/vmi.c

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171

include/asm-i386/paravirt.h

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