Commit 5f81941c authored May 29, 2007 by Martin Habets Committed by David S. Miller May 29, 2007

[SPARC]: Mark as emulating cmpxchg, add appropriate depends for DRM.



The DRM code depends on an atomic version of cmpxchg(), which is not
available on sparc32. Since other platforms besides sparc32 have this
issue a KCONFIG option is added for it.

Signed-off-by: Martin Habets <errandir_news@mph.eclipse.co.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 6197fe4d

arch/sparc/Kconfig

+7 −0

Original line number	Diff line number	Diff line
		@@ -178,6 +178,13 @@ config ARCH_HAS_ILOG2_U64
		bool
		default n

		config EMULATED_CMPXCHG
		bool
		default y
		help
		Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
		is emulated, and therefore it is not completely atomic.

		config SUN_PM
		bool
		default y

drivers/char/drm/Kconfig

+1 −1

Original line number	Diff line number	Diff line
		@@ -6,7 +6,7 @@
		#
		config DRM
		tristate "Direct Rendering Manager (XFree86 4.1.0 and higher DRI support)"
		depends on (AGP \|\| AGP=n) && PCI
		depends on (AGP \|\| AGP=n) && PCI && !EMULATED_CMPXCHG
		help
		Kernel-level support for the Direct Rendering Infrastructure (DRI)
		introduced in XFree86 4.0. If you say Y here, you need to select