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[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>
hifive-unleashed-5.1
Martin Habets 2007-05-29 01:11:57 -07:00 committed by David S. Miller
parent 6197fe4d72
commit 5f81941c9d
2 changed files with 8 additions and 1 deletions
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7
arch/sparc/Kconfig
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@ -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

2
drivers/char/drm/Kconfig
View File

@ -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