ramoops: fix compile failure on parisc

[James Bottomley]

drivers/char/ramoops.c: In function 'ramoops_init':
drivers/char/ramoops.c:221: error: implicit declaration of function 'IS_ERR'
drivers/char/ramoops.c:222: error: implicit declaration of function 'PTR_ERR'

If it actually builds on other platforms, it's probably getting
linux/err.h via some other #include.

Signed-off-by: James Bottomley <JBottomley@xxxxxxxxxxxxx>

---

diff --git a/drivers/char/ramoops.c b/drivers/char/ramoops.c
index bd9b94b..fca0c51 100644
--- a/drivers/char/ramoops.c
+++ b/drivers/char/ramoops.c
@@ -22,6 +22,7 @@
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
 #include <linux/kernel.h>
+#include <linux/err.h>
 #include <linux/module.h>
 #include <linux/kmsg_dump.h>
 #include <linux/time.h>


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