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Subject[PATCH -next] i2c: uses/select RT_MUTEXES
From: Randy Dunlap <randy.dunlap@oracle.com>

i2c-core uses rt mutexes, so it needs to select that
kconfig symbol since there is no prompt for it.

ERROR: "rt_mutex_lock" [drivers/i2c/i2c-core.ko] undefined!
ERROR: "__rt_mutex_init" [drivers/i2c/i2c-core.ko] undefined!
ERROR: "rt_mutex_trylock" [drivers/i2c/i2c-core.ko] undefined!
ERROR: "rt_mutex_unlock" [drivers/i2c/i2c-core.ko] undefined!

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
---
drivers/i2c/Kconfig | 1 +
1 file changed, 1 insertion(+)
--- linux-next-20090925.orig/drivers/i2c/Kconfig
+++ linux-next-20090925/drivers/i2c/Kconfig
@@ -5,6 +5,7 @@
menuconfig I2C
tristate "I2C support"
depends on HAS_IOMEM
+ select RT_MUTEXES
---help---
I2C (pronounce: I-square-C) is a slow serial bus protocol used in
many micro controller applications and developed by Philips. SMBus,

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