[tip: core/headers] vmw_balloon: Explicitly include linux/io.h for virt_to_phys()

[tip-bot2 for Sean Christopherson]

The following commit has been merged into the core/headers branch of tip:

Commit-ID:     97976e01d3586e488b6c4c84881806d5d2960e6c
Gitweb:        https://git.kernel.org/tip/97976e01d3586e488b6c4c84881806d5d2960e6c
Author:        Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
AuthorDate:    Tue, 26 Nov 2019 08:54:13 -08:00
Committer:     Ingo Molnar <mingo@xxxxxxxxxx>
CommitterDate: Tue, 10 Dec 2019 10:15:48 +01:00

vmw_balloon: Explicitly include linux/io.h for virt_to_phys()

Through a labyrinthian sequence of includes, usage of virt_to_phys() is
dependent on the include of asm/io.h in x86's asm/realmode.h, which is
included in x86's asm/acpi.h and thus by linux/acpi.h.  Explicitly
include linux/io.h to break the dependency on realmode.h so that a
future patch can remove the realmode.h include from acpi.h without
breaking the build.

Signed-off-by: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
Link: https://lkml.kernel.org/r/20191126165417.22423-9-sean.j.christopherson@xxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 drivers/misc/vmw_balloon.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/misc/vmw_balloon.c b/drivers/misc/vmw_balloon.c
index 5e6be15..b837e7e 100644
--- a/drivers/misc/vmw_balloon.c
+++ b/drivers/misc/vmw_balloon.c
@@ -17,6 +17,7 @@
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
 #include <linux/types.h>
+#include <linux/io.h>
 #include <linux/kernel.h>
 #include <linux/mm.h>
 #include <linux/vmalloc.h>