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Import from:
git://git.kernel.org/pub/scm/utils/dtc/dtc.git
commit 2cd89f862cdb04d91c5d59c5b39647f7d5d5b3b8
Author: David Gibson <david@gibson.dropbear.id.au>
Date: Mon Nov 21 14:18:44 2022 +1100
dtc: Warning rather than error on possible truncation of cell values
We always evaluate integer values in cell arrays as 64-bit quantities, then
truncate to the size of the array cells (32-bit by default). However to
detect accidental truncation of meaningful values, we give an error if the
truncated portion isn't either all 0 or all 1 bits. However, this can
still give counterintuitive errors. For if the user is thinking in 2's
complement 32-bit arithmetic (which would be quite natural), then they'd
expect the expression (-0xffffffff-2) to evaluate to -1 (0xffffffff).
However in 64-bit it evaluates to 0xfffffffeffffffff which does truncate
to the expected value but trips this error message.
Because of this reduce the error to only a warnings, with a somewhat more
helpful message.
Fixes: https://github.com/dgibson/dtc/issues/74
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Commands to generate update patches:
git format-patch 2cd89f862cdb04d91c5d59c5b39647f7d5d5b3b8 -- libfdt/fdt_addresses.c libfdt/fdt.c libfdt/fdt_empty_tree.c libfdt/fdt.h libfdt/fdt_ro.c libfdt/fdt_rw.c libfdt/fdt_strerror.c libfdt/fdt_sw.c libfdt/fdt_wip.c libfdt/libfdt_env.h libfdt/libfdt.h libfdt/libfdt_internal.h libfdt/TODO
sed -i 's%/libfdt/fdt.h%/cpukit/include/fdt.h%g' 00*
sed -i 's%/libfdt/libfdt.h%/cpukit/include/libfdt.h%g' 00*
sed -i 's%/libfdt/libfdt_env.h%/cpukit/include/libfdt_env.h%g' 00*
sed -i 's%/libfdt/%/cpukit/dtc/libfdt/%g' 00*
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