[PATCH] ramoops: add HAS_IOMEM dependency

[Heiko Carstens]

From: Heiko Carstens <heiko.carstens@xxxxxxxxxx>

The driver fails to compile on s390:

drivers/char/ramoops.c: In function 'ramoops_init':
drivers/char/ramoops.c:122: error: implicit declaration of function 'ioremap'

Since we won't make use of the driver anyway on s390 just let it
depend on HAS_IOMEM.

Signed-off-by: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Cc: Marco Stornelli <marco.stornelli@xxxxxxxxx>
---
 drivers/char/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -1123,6 +1123,7 @@ source "drivers/s390/char/Kconfig"
 
 config RAMOOPS
 	tristate "Log panic/oops to a RAM buffer"
+	depends on HAS_IOMEM
 	default n
 	help
 	  This enables panic and oops messages to be logged to a circular
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