On 02/28/2012 01:44 PM, Dan Carpenter wrote:
On Tue, Feb 28, 2012 at 01:33:59PM +0400, Dmitry Antipov wrote:- Fix vmap() to return ZERO_SIZE_PTR if 0 pages are requested; - fix __vmalloc_node_range() to return ZERO_SIZE_PTR if 0 bytes are requested; - fix __vunmap() to check passed pointer with ZERO_OR_NULL_PTR.Why?
1) it was requested by the subsystem (co?)maintainer, see http://lkml.org/lkml/2012/1/27/475; 2) this looks to be a convenient way to trace/debug zero-size allocation errors (although I don't advocate it as a best way). Dmitry -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>