HARDENED_USERCOPY is checked within a function so even if disabled, the
function overhead still exists. Move the static check inline.
This is at best a micro-optimisation and any difference in performance
was within noise but it is relatively consistent with the init_on_*
implementations.
Suggested-by: Kees Cook <kees@kernel.org>
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Link: https://lore.kernel.org/r/20250123221115.19722-4-mgorman@techsingularity.net
Signed-off-by: Kees Cook <kees@kernel.org>
The object size sanity checking macros that uaccess.h and uio.h use
have been living in thread_info.h for historical reasons. Needing to
use jump labels for these checks, however, introduces a header include
loop under certain conditions. The dependencies for the object checking
macros are very limited, but they are used by separate header files,
so introduce a new header that can be used directly by uaccess.h and
uio.h. As a result, this also means thread_info.h (which is rather large)
and be removed from those headers.
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202502281153.TG2XK5SI-lkp@intel.com/
Signed-off-by: Kees Cook <kees@kernel.org>
Mel Gorman