2.6.15-rc5-rt2 and Kconfig

[Esben Nielsen <simlo@phys.au.dk>]

For some strange reason I couldn't get 2.6.15-rc5-rt2 to compile. Kconfig
keeped setting CONFIG_RWSEM_XCHGADD_ALGORITHM=y in my .config even though
I had CONFIG_PREEMPT_RT=y.
I don't know much about Kconfig but to me it is odd that  the
RWSEM_XCHGADD_ALGORITHM option is both in arch/i386/Kconfig and
arch/i386/Kconfig.cpu with different dependencies. 
When I removed it from Kconfig.cpu my problem disappeared and I could
compile. But I have no clue what else this change does to the config
system....

Esben



--- linux-2.6-rt/arch/i386/Kconfig.orig 2005-12-16 22:38:26.000000000 +0100
+++ linux-2.6-rt/arch/i386/Kconfig      2005-12-20 02:11:41.000000000 +0100
@@ -245,7 +245,7 @@
 
 config RWSEM_XCHGADD_ALGORITHM
        bool
-       depends on !RWSEM_GENERIC_SPINLOCK && !PREEMPT_RT
+       depends on !RWSEM_GENERIC_SPINLOCK && !PREEMPT_RT && !M386
        default y
 
 config X86_UP_APIC
--- linux-2.6-rt/arch/i386/Kconfig.cpu.orig 2005-12-1300:02:19.000000000 +0100
+++ linux-2.6-rt/arch/i386/Kconfig.cpu  2005-12-20 02:11:47.000000000 +0100
@@ -229,11 +229,6 @@
        depends on M386
        default y
 
-config RWSEM_XCHGADD_ALGORITHM
-       bool
-       depends on !M386
-       default y
-
 config GENERIC_CALIBRATE_DELAY
        bool
        default y


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