x86/paravirt: selectively save/restore regs around pvops calls

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Impact: Optimization

Each asm paravirt-ops call says what registers are available for
clobbering.  This patch makes use of this to selectively save/restore
registers around each pvops call.  In many cases this significantly
shrinks code size.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

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Jeremy Fitzhardinge 2009-01-28 14:35:04 -08:00 • committed by H. Peter Anvin

parent b8aa287f77

commit 9104a18dcd

1 changed files with 65 additions and 35 deletions

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arch/x86/include/asm/paravirt.h

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