tree b66baaf076be8f830cc07fb02ad22e2b3a9dd3e2
parent 150cdf6ec0ede8d9f102f1817212447727dcf08c
author Eric Paris <eparis@redhat.com> 1304020552 -0400
committer Eric Paris <eparis@redhat.com> 1304020567 -0400

flex_array: allow 0 length elements

flex_arrays are supposed to be a replacement for:
kmalloc(num_elements * sizeof(element))

If kmalloc is given 0 num_elements or a 0 size element it will happily return
ZERO_SIZE_PTR.  Which looks like a valid allocation, but which will explode if
something actually try to use it.  The current flex_array code will return an
equivalent result if num_elements is 0, but will fail to work if
sizeof(element) is 0.  This patch allows allocation to work even for 0 size
elements.  It will cause flex_arrays to explode though if they are used.
Imitating the kmalloc behavior.

Based-on-patch-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by: Dave Hansen <dave@linux.vnet.ibm.com>