pstore: Fix return type of pstore_is_mounted()

This patch changes return type of pstore_is_mounted from int to bool.
Signed-off-by: Geliang Tang <geliangtang@163.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>

fs/pstore/inode.c

@@ -288,7 +288,7 @@ static const struct super_operations pstore_ops = {
 
 static struct super_block *pstore_sb;
 
-int pstore_is_mounted(void)
+bool pstore_is_mounted(void)
 {
 	return pstore_sb != NULL;
 }

fs/pstore/internal.h

@@ -63,6 +63,6 @@ extern int	pstore_mkfile(enum pstore_type_id, char *psname, u64 id,
 			      int count, char *data, bool compressed,
 			      size_t size, struct timespec time,
 			      struct pstore_info *psi);
-extern int	pstore_is_mounted(void);
+extern bool	pstore_is_mounted(void);
 
 #endif