On 5/28/19 4:42 AM, Tom Rini wrote:
On Tue, May 28, 2019 at 04:07:44AM +0200, Marek Vasut wrote:
On 5/28/19 4:06 AM, Tom Rini wrote:
On Tue, May 28, 2019 at 03:49:13AM +0200, Marek Vasut wrote:
If the source and destination buffer address is identical, there is no need to memcpy() the content. Skip the memcpy() in such a case.
Signed-off-by: Marek Vasut marex@denx.de Cc: Michal Simek michal.simek@xilinx.com Cc: Tom Rini trini@konsulko.com
Shouldn't memcpy catch that itself?
memcpy(3) says The memcpy() function copies n bytes from memory area src to memory area dest. The memory areas must not overlap. Use memmove(3) if the memory areas do overlap.
OK, and shouldn't memcpy optimize that case? Does it usually?
As the manpage says "The memory areas must not overlap." , I would expect it does not have to ?