[PATCH -next] res_counter: Add missing #include <linux/errno.h>

[Geert Uytterhoeven]

Commit 9259826ccb8165f797e4c2c9d17925b41af5f6ae ("res_counter: remove
include of cgroup.h from res_counter.h") removed the indirect inclusion of
<linux/errno.h>, breaking the build on m68k and sparc:

In file included from mm/memcontrol.c:29:
include/linux/res_counter.h: In function âres_counter_set_limitâ:
include/linux/res_counter.h:203: error: âEBUSYâ undeclared (first use in this function)
include/linux/res_counter.h:203: error: (Each undeclared identifier is reported only once
include/linux/res_counter.h:203: error: for each function it appears in.)

Signed-off-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
---
http://kisskb.ellerman.id.au/kisskb/buildresult/8342952/
http://kisskb.ellerman.id.au/kisskb/buildresult/8342757/
http://kisskb.ellerman.id.au/kisskb/buildresult/8342767/

 include/linux/res_counter.h |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/include/linux/res_counter.h b/include/linux/res_counter.h
index a83a849..f9822dc 100644
--- a/include/linux/res_counter.h
+++ b/include/linux/res_counter.h
@@ -13,6 +13,7 @@
  * info about what this counter is.
  */
 
+#include <linux/errno.h>
 #include <linux/spinlock.h>
 
 /*
-- 
1.7.0.4

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