• Chris Metcalf's avatar
    asm-generic/stat.h: support 64-bit file time_t for stat() · 2c7387ef
    Chris Metcalf authored
    The existing asm-generic/stat.h specifies st_mtime, etc., as a 32-value,
    and works well for 32-bit architectures (currently microblaze, score,
    and 32-bit tile).  However, for 64-bit architectures it isn't sufficient
    to return 32 bits of time_t; this isn't good insurance against the 2037
    rollover.  (It also makes glibc support less convenient, since we can't
    use glibc's handy STAT_IS_KERNEL_STAT mode.)
    
    This change extends the two "timespec" fields for each of the three atime,
    mtime, and ctime fields from "int" to "long".  As a result, on 32-bit
    platforms nothing changes, and 64-bit platforms will now work as expected.
    
    The only wrinkle is 32-bit userspace under 64-bit kernels taking advantage
    of COMPAT mode.  For these, we leave the "struct stat64" definitions with
    the "int" versions of the time_t and nsec fields, so that architectures
    can implement compat_sys_stat64() and friends with sys_stat64(), etc.,
    and get the expected 32-bit structure layou...
    2c7387ef
unistd.h 1.48 KB