[PATCH] vfio-ccw: Fix a build error due to missing include of linux/slab.h

[Sean Christopherson]

Include linux/slab.h to fix a build error due to kfree() being undefined.

Fixes: 3f02cb2fd9d2d ("vfio-ccw: Wire up the CRW irq and CRW region")
Signed-off-by: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
---

Encountered this when cross-compiling with a pretty minimal config, didn't
bother digging into why the error only showed up in my environment.

 drivers/s390/cio/vfio_ccw_chp.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/s390/cio/vfio_ccw_chp.c b/drivers/s390/cio/vfio_ccw_chp.c
index a646fc81c872..13b26a1c7988 100644
--- a/drivers/s390/cio/vfio_ccw_chp.c
+++ b/drivers/s390/cio/vfio_ccw_chp.c
@@ -8,6 +8,7 @@
  *            Eric Farman <farman@xxxxxxxxxxxxx>
  */
 
+#include <linux/slab.h>
 #include <linux/vfio.h>
 #include "vfio_ccw_private.h"
 
-- 
2.26.0