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

[Rob Herring]

On Thu, Aug 31, 2017 at 12:01 PM, Rob Herring <robh+dt at kernel.org> wrote:
> On Thu, Aug 31, 2017 at 11:16 AM, Russell King - ARM Linux
> <linux at armlinux.org.uk> wrote:
>> On Thu, Aug 31, 2017 at 10:58:12AM -0500, Rob Herring wrote:
>>> On Tue, Aug 8, 2017 at 11:06 PM, David Gibson
>>> <david at gibson.dropbear.id.au> wrote:
>>> > On Tue, Aug 08, 2017 at 12:28:19PM +0100, Russell King - ARM Linux wrote:
>>> >> On Wed, Jul 26, 2017 at 11:30:04AM +1000, David Gibson wrote:
>>> >> > On Tue, Jul 25, 2017 at 05:20:09PM +0100, Russell King wrote:
>>> >> > > 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 <rmk+kernel at armlinux.org.uk>
>>> >> >
>>> >> > 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.

Well, your fix went in before I got the cherry-pick sent to Linus.
Still, let me know if there's any issue with the upstream fix because
when I sync dtc this fix is going to be overwritten with upstream.

Rob