Re: [PATCH 3/3] Add NOWARN and NOERR compile conditions

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On 08/01/2015 02:45 PM, Christopher Li wrote:
On Sat, Aug 1, 2015 at 4:09 AM, Tony Camuso <tcamuso@xxxxxxxxxx> wrote:

I've since submitted a runtime patch (3/3 V3) with a switch as a
response to this patch, but it basically does the same thing here.

Consider the case where the source contains something like this...

         struct foo {
                 union {
                         int number;
                         int *pointer;
                 };
         };

There being no ident for the union within the struct, we get the warning,
"missing identifier in declaration" etc.


I can't reproduce the warning with the chrisl repo master branch.

That being said, if there is indeed a bug in sparse, it should be a
separate patch. It changes the parsing behavior.

Thanks

Chris


Here's one that might be a sparse bug.

/work/linux/fs/bio.i:5368:26: error: Expected ) at end of cast operator
/work/linux/fs/bio.i:5368:26: error: got __int128

Here is the kernel source in include/linux/math64.h that causes the error.

static inline __attribute__((no_instrument_function)) u64 mul_u64_u32_shr(u64 a, u32 mul, unsigned int shift)
{
 return (u64)(((unsigned __int128)a * mul) >> shift);
}

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