tree de17c0d0a0ba4d6e06c0e65553707bcc19174db0
parent d60006764d95743bef99c4ade25096548efdfb67
author Xi Wang <xi.wang@gmail.com> 1338506764 -0700
committer chrmhoffmann <chrmhoffmann@gmail.com> 1502393825 +0200

introduce SIZE_MAX

commit a3860c1c5dd1137db23d7786d284939c5761d517 upstream.

ULONG_MAX is often used to check for integer overflow when calculating
allocation size.  While ULONG_MAX happens to work on most systems, there
is no guarantee that `size_t' must be the same size as `long'.

This patch introduces SIZE_MAX, the maximum value of `size_t', to improve
portability and readability for allocation size validation.

Change-Id: Id9e6f4b7b80e0dca383394da26e2378e7296d8a6
Signed-off-by: Xi Wang <xi.wang@gmail.com>
Acked-by: Alex Elder <elder@dreamhost.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Qiang Huang <h.huangqiang@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>