x86, mm: Fix CONFIG_VMSPLIT_1G and 2G_OPT trampoline
commit39f477027fc8ed0115b2c73ec2a3d53f33e0d35e
authorHugh Dickins <hughd@google.com>
Wed, 25 Aug 2010 05:44:12 +0000 (24 22:44 -0700)
committerGreg Kroah-Hartman <gregkh@suse.de>
Fri, 29 Oct 2010 04:51:45 +0000 (28 21:51 -0700)
tree7bc680d92af50e035e3c016047a0895424a80833
parentd521d5c586bf14422927a3574d921b0f4af19023
x86, mm: Fix CONFIG_VMSPLIT_1G and 2G_OPT trampoline

commit b7d460897739e02f186425b7276e3fdb1595cea7 upstream.

rc2 kernel crashes when booting second cpu on this CONFIG_VMSPLIT_2G_OPT
laptop: whereas cloning from kernel to low mappings pgd range does need
to limit by both KERNEL_PGD_PTRS and KERNEL_PGD_BOUNDARY, cloning kernel
pgd range itself must not be limited by the smaller KERNEL_PGD_BOUNDARY.

Signed-off-by: Hugh Dickins <hughd@google.com>
LKML-Reference: <alpine.LSU.2.00.1008242235120.2515@sister.anvils>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
arch/x86/kernel/trampoline.c