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authorMartin Habets <errandir_news@mph.eclipse.co.uk>2007-05-29 04:11:57 -0400
committerDavid S. Miller <davem@sunset.davemloft.net>2007-05-29 05:51:24 -0400
commit5f81941c9d47f783e834028dcfb8548809da5a53 (patch)
tree8d528138012db5f8436a6822c79aea82977a8e90 /arch/sparc
parent6197fe4d720ea3e2ee94cdc7ef32d6c0151199de (diff)
[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>
Diffstat (limited to 'arch/sparc')
-rw-r--r--arch/sparc/Kconfig7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index bd992c0048f0..fbcc00c6c06e 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -178,6 +178,13 @@ config ARCH_HAS_ILOG2_U64
178 bool 178 bool
179 default n 179 default n
180 180
181config EMULATED_CMPXCHG
182 bool
183 default y
184 help
185 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
186 is emulated, and therefore it is not completely atomic.
187
181config SUN_PM 188config SUN_PM
182 bool 189 bool
183 default y 190 default y