Re: [PATCH] scripts/dtc: fix '%zx' warning

On Thu, Aug 31, 2017 at 11:16 AM, Russell King - ARM Linux
[off-list ref] wrote:

On Thu, Aug 31, 2017 at 10:58:12AM -0500, Rob Herring wrote:

quoted

On Tue, Aug 8, 2017 at 11:06 PM, David Gibson
[off-list ref] wrote:

quoted

On Tue, Aug 08, 2017 at 12:28:19PM +0100, Russell King - ARM Linux wrote:

quoted

On Wed, Jul 26, 2017 at 11:30:04AM +1000, David Gibson wrote:

quoted

On Tue, Jul 25, 2017 at 05:20:09PM +0100, Russell King wrote:

quoted

dtc uses an incorrect format specifier for printing a uint64_t value.
uint64_t may be either 'unsigned long' or 'unsigned long long' depending
on the host architecture.

Fix this by using %llx and casting to unsigned long long, which ensures
that we always have a wide enough variable to print 64 bits of hex.

  HOSTCC  scripts/dtc/checks.o
scripts/dtc/checks.c: In function 'check_simple_bus_reg':
scripts/dtc/checks.c:876:2: warning: format '%zx' expects argument of type 'size_t', but argument 4 has type 'uint64_t' [-Wformat=]
  snprintf(unit_addr, sizeof(unit_addr), "%zx", reg);
  ^
scripts/dtc/checks.c:876:2: warning: format '%zx' expects argument of type 'size_t', but argument 4 has type 'uint64_t' [-Wformat=]

Fixes: 828d4cdd012c ("dtc: check.c fix compile error")
Signed-off-by: Russell King <redacted>

This (embarrassing) error is already fixed in upstream dtc.

It remains unfixed in 4.13-rc4.  How do we get this fixed in the
kernel's dtc?  From what I can see, sending a patch to fix stuff
doesn't work.

Sorry, didn't see this until Andrew M picked it up.

How do we know whether whatever is in upstream dtc fixes the problem
that I'm seeing?

Build upstream dtc or here's a branch[1] with the cherry-picked fix.

Rob

[1] git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git dt/testing
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