x86, mm: Fix CONFIG_VMSPLIT_1G and 2G_OPT trampoline
authorHugh Dickins <hughd@google.com>
Wed, 25 Aug 2010 05:44:12 +0000 (22:44 -0700)
committerH. Peter Anvin <hpa@zytor.com>
Wed, 25 Aug 2010 06:05:17 +0000 (23:05 -0700)
commitb7d460897739e02f186425b7276e3fdb1595cea7
treed8ecc51119e21a5ef285c234bf1bf554112fb56b
parent51e3c1b558b31b11bf5fc66d3c6f5adacf3573f7
x86, mm: Fix CONFIG_VMSPLIT_1G and 2G_OPT trampoline

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>
arch/x86/kernel/trampoline.c