Messages in this thread | | | Date | Thu, 28 Jan 2010 20:12:06 -0800 (PST) | Subject | Re: linux-next: sparc tree build warning | From | David Miller <> |
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From: Stephen Rothwell <sfr@canb.auug.org.au> Date: Fri, 29 Jan 2010 10:25:43 +1100
> Hi Dave, > > On Thu, 28 Jan 2010 05:24:32 -0800 (PST) David Miller <davem@davemloft.net> wrote: >> >> From: Stephen Rothwell <sfr@canb.auug.org.au> >> Date: Thu, 28 Jan 2010 18:44:23 +1100 >> >> > I am still seeing these. Is it my compiler version (gcc4.4.0)? >> >> You can't turn on DEBUG_STRICT_USER_COPY_CHECKS and >> expect a successful build. It's for developers to >> look at the errors that are generated and audit those >> cases in detail. > > These are defconfig builds and CONFIG_DEBUG_STRICT_USER_COPY_CHECKS is > not set in either case.
Simply ignore the warning then, I thought you were reporting a build failure.
> I only do an i386 defconfig build and I don't get these warnings.
Looking at the specific case of net/core/pktgen.c:867
"len" is variable in the net/core/pktgen.c line that emits the warning
Even though it is limited to "sizeof(name) - 1" via strn_len()'s third argument, that's a lot to expect the compiler to dig into and be able to conclude invariants from.
Please just ignore the warnings.
Thanks.
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