[PATCH] powerpc: Include <asm/pte-walk.h> header file to fix a warning

[Mathieu Malaterre]

Make sure to include <asm/pte-walk.h> to provide the following prototype:
__find_linux_pte.

Remove the following warning treated as error (W=1):

  arch/powerpc/mm/pgtable.c:316:8: error: no previous prototype for '__find_linux_pte' [-Werror=missing-prototypes]

Fixes: 0caed4de502c ("powerpc/mm: move __find_linux_pte() out of hugetlbpage.c")
Cc: Christophe Leroy <christophe.leroy@xxxxxx>
Signed-off-by: Mathieu Malaterre <malat@xxxxxxxxxx>
---
 arch/powerpc/mm/pgtable.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/mm/pgtable.c b/arch/powerpc/mm/pgtable.c
index db4a6253df92..2aa042193ace 100644
--- a/arch/powerpc/mm/pgtable.c
+++ b/arch/powerpc/mm/pgtable.c
@@ -31,6 +31,7 @@
 #include <asm/tlbflush.h>
 #include <asm/tlb.h>
 #include <asm/hugetlb.h>
+#include <asm/pte-walk.h>
 
 static inline int is_exec_fault(void)
 {
-- 
2.20.1