On 03/07/18 12:25, James Hogan wrote:

On Wed, Mar 07, 2018 at 12:11:41PM -0800, Frank Rowand wrote:

quoted

I initially misread the patch description (and imagined an entirely
different problem).


On 03/07/18 06:06, James Hogan wrote:

quoted

On dtb files which contain hyphens, the dt_S_dtb command to build the> dtb.S files (which allow DTB files to be built into the kernel) results> in errors like the following:> > bcm3368-netgear-cvg834g.dtb.S: Assembler messages:> bcm3368-netgear-cvg834g.dtb.S:5: Error: : no such section> bcm3368-netgear-cvg834g.dtb.S:5: Error: junk at end of line, first unrecognized character is `-'> bcm3368-netgear-cvg834g.dtb.S:6: Error: unrecognized opcode `__dtb_bcm3368-netgear-cvg834g_begin:'> bcm3368-netgear-cvg834g.dtb.S:8: Error: unrecognized opcode `__dtb_bcm3368-netgear-cvg834g_end:'> bcm3368-netgear-cvg834g.dtb.S:9: Error: : no such section> bcm3368-netgear-cvg834g.dtb.S:9: Error: junk at end of line, first unrecognized character is `-'

Please replace the following section:

quoted

This is due to the hyphen being used in symbol names. Replace all
hyphens 
with underscores in the dt_S_dtb command to avoid this problem.

Quite a lot of dts files have hyphens, but its only a problem on MIPS
where such files can be built into the kernel. For example when
CONFIG_DT_NETGEAR_CVG834G=y, or on BMIPS kernels when the dtbs target is
used (in the latter case it admitedly shouldn't really build all the
dtb.o files, but thats a separate issue).

with:

   cmd_dt_S_dtb constructs the assembly source to incorporate a devicetree
   FDT (that is, the .dtb file) as binary data in the kernel image.
   This assembly source contains labels before and after the binary data.
   The label names incorporate the file name of the corresponding .dtb
   file.  Hyphens are not legal characters in labels, so transform all
   hyphens from the file name to underscores when constructing the labels.

Thanks, that is clearer.

I'll keep the paragraph about MIPS and the example configuration though,
as I think its important information to reproduce the problem, and to
justify why it wouldn't be appropriate to just rename the files (which
was my first reaction).

Other than the part that says "its only a problem on MIPS".  That is
pedantically correct because no other architecture (that I am aware
of, not that I searched) currently has a devicetree source file name
with a hyphen in it, where that file is compiled into the kernel as
an asm file.  But it is potentially a problem on any architecture
to it is misleading to label it as MIPS only.

quoted

Reviewed-by: Frank Rowand <redacted>

Thanks
James