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 <ma...@denx.de> >>>> Cc: Michal Simek <michal.si...@xilinx.com> >>>> Cc: Tom Rini <tr...@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 ? -- Best regards, Marek Vasut _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
