| Date | Tue, 07 Dec 2010 16:45:00 -0800 | From | Greg KH <> | Subject | [114/127] x86, mm: Fix CONFIG_VMSPLIT_1G and 2G_OPT trampoline |
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2.6.32-stable review patch. If anyone has any objections, please let us know.
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From: Hugh Dickins <hughd@google.com>
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> Cc: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- arch/x86/kernel/trampoline.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
--- a/arch/x86/kernel/trampoline.c +++ b/arch/x86/kernel/trampoline.c @@ -47,8 +47,7 @@ void __init setup_trampoline_page_table( /* Copy kernel address range */ clone_pgd_range(trampoline_pg_dir + KERNEL_PGD_BOUNDARY, swapper_pg_dir + KERNEL_PGD_BOUNDARY, - min_t(unsigned long, KERNEL_PGD_PTRS, - KERNEL_PGD_BOUNDARY)); + KERNEL_PGD_PTRS); /* Initialize low mappings */ clone_pgd_range(trampoline_pg_dir,
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