y2038: stat: avoid 'time_t' in 'struct stat'

The time_t definition may differ between user space and kernel space,
so replace time_t with an unambiguous 'long' for the mips and sparc.

The same structures also contain 'off_t', which has the same problem,
so replace that as well on those two architectures and powerpc.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/mips/include/uapi/asm/stat.h

@@ -26,17 +26,17 @@ struct stat {
 	gid_t		st_gid;
 	unsigned	st_rdev;
 	long		st_pad2[2];
-	off_t		st_size;
+	long		st_size;
 	long		st_pad3;
 	/*
 	 * Actually this should be timestruc_t st_atime, st_mtime and st_ctime
 	 * but we don't have it under Linux.
 	 */
-	time_t		st_atime;
+	long		st_atime;
 	long		st_atime_nsec;
-	time_t		st_mtime;
+	long		st_mtime;
 	long		st_mtime_nsec;
-	time_t		st_ctime;
+	long		st_ctime;
 	long		st_ctime_nsec;
 	long		st_blksize;
 	long		st_blocks;
@@ -70,13 +70,13 @@ struct stat64 {
 	 * Actually this should be timestruc_t st_atime, st_mtime and st_ctime
 	 * but we don't have it under Linux.
 	 */
-	time_t		st_atime;
+	long		st_atime;
 	unsigned long	st_atime_nsec;	/* Reserved for st_atime expansion  */
 
-	time_t		st_mtime;
+	long		st_mtime;
 	unsigned long	st_mtime_nsec;	/* Reserved for st_mtime expansion  */
 
-	time_t		st_ctime;
+	long		st_ctime;
 	unsigned long	st_ctime_nsec;	/* Reserved for st_ctime expansion  */
 
 	unsigned long	st_blksize;
@@ -105,7 +105,7 @@ struct stat {
 	unsigned int		st_rdev;
 	unsigned int		st_pad1[3]; /* Reserved for st_rdev expansion */
 
-	off_t			st_size;
+	long			st_size;
 
 	/*
 	 * Actually this should be timestruc_t st_atime, st_mtime and st_ctime

arch/powerpc/include/uapi/asm/stat.h

@@ -40,7 +40,7 @@ struct stat {
 	uid_t		st_uid;
 	gid_t		st_gid;
 	unsigned long	st_rdev;
-	off_t		st_size;
+	long		st_size;
 	unsigned long	st_blksize;
 	unsigned long	st_blocks;
 	unsigned long	st_atime;

arch/sparc/include/uapi/asm/stat.h

@@ -14,12 +14,12 @@ struct stat {
 	uid_t   st_uid;
 	gid_t   st_gid;
 	unsigned int st_rdev;
-	off_t   st_size;
-	time_t  st_atime;
-	time_t  st_mtime;
-	time_t  st_ctime;
-	off_t   st_blksize;
-	off_t   st_blocks;
+	long    st_size;
+	long    st_atime;
+	long    st_mtime;
+	long    st_ctime;
+	long    st_blksize;
+	long    st_blocks;
 	unsigned long  __unused4[2];
 };
 
@@ -57,15 +57,15 @@ struct stat {
 	unsigned short	st_uid;
 	unsigned short	st_gid;
 	unsigned short	st_rdev;
-	off_t		st_size;
-	time_t		st_atime;
+	long		st_size;
+	long		st_atime;
 	unsigned long	st_atime_nsec;
-	time_t		st_mtime;
+	long		st_mtime;
 	unsigned long	st_mtime_nsec;
-	time_t		st_ctime;
+	long		st_ctime;
 	unsigned long	st_ctime_nsec;
-	off_t		st_blksize;
-	off_t		st_blocks;
+	long		st_blksize;
+	long		st_blocks;
 	unsigned long	__unused4[2];
 };