[PATCH v2] SUNRPC: Add missing definition of ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE

[Christophe Leroy]

Even if that's only a warning, not including asm/cacheflush.h
leads to svc_flush_bvec() being empty allthough powerpc defines
ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE.

  CC      net/sunrpc/svcsock.o
net/sunrpc/svcsock.c:227:5: warning: "ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE" is not defined [-Wundef]
 #if ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE
     ^

Include linux/highmem.h so that asm/cacheflush.h will be included.

Reported-by: Christophe Leroy <christophe.leroy at csgroup.eu>
Reported-by: kernel test robot <lkp at intel.com>
Cc: Chuck Lever <chuck.lever at oracle.com>
Fixes: ca07eda33e01 ("SUNRPC: Refactor svc_recvfrom()")
Signed-off-by: Christophe Leroy <christophe.leroy at csgroup.eu>
---
v2: Use linux/highmem.h instead of asm/cacheflush.sh
Signed-off-by: Christophe Leroy <christophe.leroy at csgroup.eu>
---
 net/sunrpc/svcsock.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 5c4ec9386f81..c537272f9c7e 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -44,6 +44,7 @@
 #include <net/tcp.h>
 #include <net/tcp_states.h>
 #include <linux/uaccess.h>
+#include <linux/highmem.h>
 #include <asm/ioctls.h>
 
 #include <linux/sunrpc/types.h>
-- 
2.25.0