xen: fold xen_sysexit into xen_iret

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xen_sysexit and xen_iret were doing essentially the same thing.  Rather
than having a separate implementation for xen_sysexit, we can just strip
the stack back to an iret frame and jump into xen_iret.  This removes
a lot of code and complexity - specifically, another critical region.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

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Jeremy Fitzhardinge 2008-04-02 10:54:11 -07:00 • committed by Ingo Molnar

parent 2bd50036b5

commit b77797fb2b

2 changed files with 15 additions and 64 deletions

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9

arch/x86/kernel/entry_32.S

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70

arch/x86/xen/xen-asm.S

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