[PATCH] overlayfs: include linux/pagemap.h for PAGE_CACHE_SIZE

[Arnd Bergmann]

The overlayfs has started enforcing a maximum file size, but is missing
the header file that defines the PAGE_CACHE_SIZE constant in some
configurations.

fs/overlayfs/super.c: In function 'ovl_fill_super':
fs/overlayfs/super.c:939:29: error: 'PAGE_CACHE_SIZE' undeclared (first use in this function)

Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Fixes: 7b1746cac878 ("ovl: setattr: check permissions before copy-up")
Cc: <stable@xxxxxxxxxxxxxxx>
---
The patch that introduced this was marked for stable, so I'm marking this
the same way.

diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index ea94e50a3473..a4cbdf9824c7 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -9,6 +9,7 @@
 
 #include <linux/fs.h>
 #include <linux/namei.h>
+#include <linux/pagemap.h>
 #include <linux/xattr.h>
 #include <linux/security.h>
 #include <linux/mount.h>

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