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Commit 02edeb58 authored by Jeff Dike's avatar Jeff Dike Committed by Linus Torvalds
Browse files

[PATCH] uml: mark SMP on UML/x86_64 as broken 



Noticed by Al Viro <viro@parcelfarce.linux.theplanet.co.uk> - SMP on x86_64 is
fundamentally broken due to UML's reuse of the host arch's percpu stuff.  This
is OK on x86, but the x86_64 pda stuff just won't work for UML.

Signed-off-by: default avatarJeff Dike <jdike@addtoit.com>
Cc: Paolo Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 13abf813

arch/um/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -196,7 +196,7 @@ config HOST_2G_2G 
config SMP

	bool "Symmetric multi-processing support (EXPERIMENTAL)"

	default n

	depends on MODE_TT && EXPERIMENTAL

	depends on (MODE_TT && EXPERIMENTAL && !SMP_BROKEN) || (BROKEN && SMP_BROKEN)

	help

	This option enables UML SMP support.

	It is NOT related to having a real SMP box. Not directly, at least.

arch/um/Kconfig.x86_64

+4 −0
Original line number Diff line number Diff line
@@ -37,3 +37,7 @@ config ARCH_HAS_SC_SIGNALS 
config ARCH_REUSE_HOST_VSYSCALL_AREA

	bool

	default n



config SMP_BROKEN

	bool

	default y