On Mon, Jan 27, 2020 at 12:10:31PM -0500, Tom Rini wrote:
In upstream libfdt, 6dcb8ba4 "libfdt: Add helpers for accessing unaligned words" introduced changes to support unaligned reads for ARM platforms and 11738cf01f15 "libfdt: Don't use memcpy to handle unaligned reads on ARM" improved the performance of these helpers.
In practice however, this only occurs when the user has forced the device tree to be placed in memory in a non-aligned way, which in turn violates both our rules and the Linux Kernel rules for how things must reside in memory to function.
This "in practice" part is important as handling these other cases adds visible (1 second or more) delay to boot in what would be considered the fast path of the code.
Cc: Patrice CHOTARD patrice.chotard@st.com Cc: Patrick DELAUNAY patrick.delaunay@st.com Link: https://www.spinics.net/lists/devicetree-compiler/msg02972.html Signed-off-by: Tom Rini trini@konsulko.com Tested-by: Patrice Chotard patrice.chotard@st.com
Applied to u-boot/master, thanks!