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authorHugh Dickins <hugh@veritas.com>2008-07-02 22:48:03 +0100
committerIngo Molnar <mingo@elte.hu>2008-07-03 08:19:18 +0200
commit216705d2720dedf630b55d641737f430ead0c228 (patch)
tree7de026a8524bb63f11e35713e69568ede674a49e /block
parentefac41894df57d32b483ac622d03541b5b2692c0 (diff)
x86: fix Intel Mac booting with EFI
Fedora reports that mem_init()'s zap_low_mappings(), extended to SMP in 61165d7a035f6571c7576e7f51e7230157724c8d x86: fix app crashes after SMP resume causes 32-bit Intel Mac machines to reboot very early when booting with EFI. The EFI code appears to manage low mappings for itself when needed; but like many before it, confuses PSE with PAE. So it has only been mapping half the space it needed when PSE but not PAE. This remained unnoticed until we moved the SMP zap_low_mappings() before efi_enter_virtual_mode(). Presumably could have been noticed years ago if anyone ran a UP kernel on such machines? Reported-by: Peter Jones <pjones@redhat.com> Signed-off-by: Hugh Dickins <hugh@veritas.com> Cc: Peter Jones <pjones@redhat.com> Cc: Glauber Costa <gcosta@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Tested-by: Peter Jones <pjones@redhat.com>
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