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authorJeremy Fitzhardinge2009-10-12 16:32:43 -0700
committerIngo Molnar2009-10-13 09:22:01 +0200
commit71999d9862e667f1fd14f8fbfa0cce6d855bad3f (patch)
treeb228a66c29154a446dc3adaf6f0dae8ee4b908d3 /Documentation
parentd1705c558c95418378b11a0be963fe1b3e2fa381 (diff)
x86/paravirt: Use normal calling sequences for irq enable/disable
Bastian Blank reported a boot crash with stackprotector enabled, and debugged it back to edx register corruption. For historical reasons irq enable/disable/save/restore had special calling sequences to make them more efficient. With the more recent introduction of higher-level and more general optimisations this is no longer necessary so we can just use the normal PVOP_ macros. This fixes some residual bugs in the old implementations which left edx liable to inadvertent clobbering. Also, fix some bugs in __PVOP_VCALLEESAVE which were revealed by actual use. Reported-by: Bastian Blank <bastian@waldi.eu.org> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Stable Kernel <stable@kernel.org> Cc: Xen-devel <xen-devel@lists.xensource.com> LKML-Reference: <4AD3BC9B.7040501@goop.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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